JPH0437658A - Combined material and its production - Google Patents

Abstract

PURPOSE:To join a heat resistant member of an intermetallic compd. or a high m.p. metal and a functional member such as a superconducting member with high quality at a low cost by joining first and second members with an insert forming an intermetallic compd. in-between. CONSTITUTION:When first and second members are joined to each other with an insert in-between to produce a combined material, a mixture contg. plural kinds of elements mixed in such a ratio as to enable the formation of an intermetallic compd. is used as the material of the insert. This insert is positioned between the members and they are heat-treated at a temp. at which the intermetallic compd. is formed. The members are joined to each other with heat generated during the formation of the intermetallic compd.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a composite material using an intermetallic compound as an insert material and a method for manufacturing the same.

[Conventional technology] Intermetallic compounds have excellent properties such as excellent heat resistance, oxidation resistance, wear resistance, etc., can be constructed lightweight, and have functionality such as superconductivity, so they are used in various applications. It is seen as an extremely promising material.

Examples of intermetallic compounds include Ti-Al system, Ni-Al
system.

N1-Tl system, Co-Tl system, Pc-Al system, N
o-Al system.

2 such as No-8j series, 1-b-^1 series, Ti-3t series, etc.
elemental system, Fe-A I-3i system, Al-Ga-As
Multidimensional systems such as the system are known. Specifically, Ti^l, Tii At are used as structural materials.

^L Ti, Co3 Ti, Nii^l, Ni^
l, Fe^3803 A18.

MO3I2, Nb3Al, Ti, S]3, etc. are known. In addition, T1Ni, which has a shape memory effect, C
uZn etc., Nba Sn, V3 as a superconducting material
Ga, Nbi Ga, Nbx Ge, etc., as magnetic materials Fe, (Al5i), 5IIICo,
, 1nsb as semiconductor and other functional materials,
GaAs.

There are many others, such as B1□Te+ and Zn5e.

Examples of products that utilize intermetallic compounds include external wall materials that are used at high temperatures, turbine components, engine parts such as pistons and valve systems, elastic components, and superconductors that exhibit the unique properties of various intermetallic compounds. Functional parts that take advantage of this can be considered.

[Problems to be solved by the invention] Although intermetallic compounds have excellent properties as described above,
Difficult to join. For example, when joining is performed by electron beam welding, crystal grains may become coarse in the welded portion, or defects may occur that are too large to be ignored in practical terms. Bonding using brazing or adhesives is also possible, but
The heat resistance, mechanical properties, and inherent functionality of the joint are inferior to those of the base material.

It is also conceivable to join at a high temperature by heating the joint while applying pressure, or if the joint is heated to a temperature at which it softens, it becomes difficult to maintain a predetermined shape.

Therefore, the object of the present invention is to combine members having heat resistance such as intermetallic compounds and high melting point metals or! ! Control of structure, defects, etc. of the joint so that functional parts such as 3-conductors can be joined at high quality and at low cost, the heating temperature during joining can be relatively low, and the joint can perform as well as the base material. The object of the present invention is to provide a composite material and a manufacturing method thereof.

[Means for Solving the Problems] The composite material of the present invention developed to achieve the above objectives is as follows:
A composite material in which a first member and a second member having heat resistance and functionality, such as intermetallic compounds, alloys, high melting point metals, semiconductors, and ceramics, are joined to each other via an insert material, An intermetallic compound is used for the insert material.

The method of the present invention for obtaining the above-mentioned composite material is characterized in that when a first member and a second member are joined to each other via an insert material, the material of the insert material has a specific composition ratio that allows the formation of an intermetallic compound. Forming an intermetallic compound by positioning the insert material across the first member and the second member and heat-treating it at a temperature at which the intermetallic compound is formed. The first member and the second member are bonded to each other by heat generated at the time.

FIG. 1 shows an outline of the composite material manufacturing process according to the method of the present invention.

In the above heat treatment, it may be advantageous to apply pressure by an appropriate method such as HP or HIP. At this time, it is possible to create a flow accompanied by shear stress in the insert material during the formation of the intermetallic compound by applying pressure to the joint from a specific direction using a partial press or a two-wheel press, etc. to a degree that is greater than the weight of the member itself, resulting in even more favorable results. may be obtained.

The raw material of the mixture used for the insert material needs to be at least partially composed of a metal material before the formation of an intermetallic compound, but it may partially contain an intermetallic compound. In addition, the purpose of improving various properties of composite materials after joining,
Alternatively, appropriate elements and compounds such as oxides, nitrides, and carbides may be included for the purpose of facilitating molding into a desired part shape. The raw material does not need to be a pure metal lump, and may be a solid solution or a composite made by plating or the like. Examples of the form of the raw materials before mixing are powder 1 flake, wire, foil, etc.

The method of mixing or pressing the raw materials constituting the above mixture is j5; If the raw materials are in the form of powder or flakes,
Extrude the mixture using a mold mixer, ball mill, mixer, etc., or press with a mold press, hot press, or C.
Pressure bonding is performed by AP (cold isostatic pressing) or HIP. Alternatively, instead of filling the metal vibrator with the mixed force/mixture, the metal vibrator may be forged using a swaging machine until it has a predetermined outer diameter.

In the case of linear raw materials, the raw material wires are bundled or twisted together, and then the wires are crimped together using a wire drawing machine, swaging machine, extruder, or the like. In the case of foil-like raw materials, the foils are laminated in the thickness direction or rolled up after being laminated and then pressed together using a rolling device, swaging machine, or extruder.

The molding process of the above-mentioned mixed press-bonded body may be performed coldly or warmly in order to reduce the deformation resistance during molding. In the case of warm forming, it is preferable that the temperature is below the temperature at which intermetallic compounds are formed, or if forming is completed in a short enough time to form intermetallic compounds in a part of the structure, intermetallic compounds will not be formed. The molding may also be carried out at a temperature higher than the temperature.

In addition, the above-mentioned molding process may be performed in the air or vacuum, inert gas, redox atmosphere gas, etc. by an appropriate method.
Alternatively, a combination of these atmospheres may be used.

Note that the above-mentioned mixture may be applied to the joint portion of either the first member or the second member by thermal spraying, vapor deposition, or the like. Alternatively, coatings of different raw materials constituting the mixture are formed on the joint portions of both the first member and the second member, and by bringing them into close contact with each other, the mixture is substantially removed. Alternatively, an insert material may be created.

[Operation] The insert material, which has been processed into a desired shape and has not yet formed an intermetallic compound, is provided across the first member and the second member, and heated to a temperature at which the intermetallic compound is formed. This heat treatment causes diffusion or self-combustion sintering to form an intermetallic compound, and at the same time, the first member and the second member are joined due to the heat generated during the formation of the intermetallic compound or the heat of the self-combustion reaction. Ru. The temperature due to self-heating becomes higher than the heating temperature. In addition, in order to reduce deformation during heat treatment, it is preferable to set the heating temperature to a temperature range below the common phase line of the intermetallic compound. It may be necessary to maintain the temperature for a certain period of time to terminate the formation of intermetallic compounds. The lower the temperature, the longer it takes.

The bonding mechanism using the insert material according to the present invention is that the self-heating generated during the formation of an intermetallic compound removes and diffuses impurities, destroys the oxide film at the interface of the bond, or softens or partially softens the interface of the bond. This is thought to be due to the intermolecular force or metallic bonding force due to the melting of the two, crushing the fine irregularities at the interface, and the complete contact between the two, and diffusion.

Therefore, it becomes easy to control the structure and defects of the joint, such as preventing or reducing the formation of melted/solidified structures at the joint.

[Example] Examples of the present invention will be described below with reference to FIGS. 2 to 5. An example of composite material A shown in FIG.
[Members]] and similarly intermetallic compounds (Ti formula 1+Ti,
and the second member 12 made of intermetallic compound (AI).
They are joined using Inosato material 13 made of TiAl+Ti3^1).

An example of the manufacturing process shown in FIG. 2 includes a step 20 of mixing raw materials for the mixed press-bonded body, which is the material of the insert material 13, and a step 20 of mixing the raw materials of the mixed press-bonded body, which is performed as necessary to press the mixed raw materials to give a shape. Mixing pressure tube manufacturing process 21 and pre-forming heat treatment process 2
2, a molding step 23, a step 25 of manufacturing the first member 11, a step 26 of manufacturing the second member 12, and temporarily fixing the insert material 13 to the first member 11 and the second member 12. a heat treatment step 31 of heating to the formation temperature of the intermetallic compound, a processing step 32 after the heat treatment performed as necessary, a heat treatment step 33 after the formation of the intermetallic compound, and a finishing step 34. There is.

In the step 20 of mixing raw materials for the insert material 13, for example, 350
Ti: Al-G49 by weight fraction of AI powder with a mesh size of F or more and sponge T1 powder with a mesh size of more than 350 mesh F
o: 3B96, A is mixed using a gas-substituted dry ball mill. This mixed pressed body undergoes heat treatment step 3 to be described later, and becomes an intermetallic compound of TiAl+Ti, +^1.

Note that Ti: Al-37,179 was added to this mixed crimped body.
o: When using a mixture at a ratio of 62.83%, Al3T can be
An insert material made of the intermetallic compound of j] 3 is obtained.

In addition, Ti: AI”=68.4 for this mixed crimped body
26: When using a mixture at a ratio of 31.6%, the TiA
An insert material 13 made of an intermetallic compound of l+Tii Al is obtained.

In the manufacturing process 21 of the mixed pressed body, which is carried out as necessary, a mold press is used to obtain a mixed pressed body (in this case, a green compact) having a desired shape. In addition, instead of a mold press,
The mixed raw material may be packed into a pipe and pressed into various shapes by rotary swaging or the like.

After the above step 21 is completed, if necessary, a pre-forming heat treatment step 22 such as annealing performed in a vacuum is performed to remove the processing strain when the mixed pressed body is manufactured in the above step 21, Reduce deformation resistance. Further, the pressure bonding surface of the mixed pressure bonded body is made stronger by diffusion, and the strength is improved.

The pre-forming heat treatment step 22 also has the effect of diffusing or removing impurity components in the mixture or mixed pressed body. This heat treatment step 22 may be carried out in the air or vacuum, in an inert gas, a redox field, etc., or a combination of these atmospheres. The processing temperature is generally below the temperature at which intermetallic compounds are formed, or, if the heating is short enough to form an intermetallic compound on a part of the bonded surface, it is above the temperature at which an intermetallic compound is formed. It doesn't matter. In particular, in the case of Ti-Al system, the temperature range is preferably from 200°C to 600°C.

The mixed pressed body obtained in step 21 may be forged or machined in forming step 23.

However, if the desired shape can be obtained by the step 21, the heat treatment step 22 and the molding step 23 may be omitted.

In the manufacturing process 25 of the first member 11, for example, an A of 350 mesh or less produced by a gas atomization method is used.
1 powder and sponge Ti powder of 350 mesh or less,
Mold plate fraction Ti: AI-68,4%: 31.6
Mixing is performed at a ratio of 0° using a dry ball mill purged with Ar gas. Thereafter, a pressed mixed body having a desired shape is obtained without performing swaging processing by filling it into a mold press or pipe. Note that this mixed crimped body is used as insert material 1
The molding may be performed using the same steps as in case 3. The first member 11 made of an intermetallic compound (TiAl + T13Al) is obtained by heat-treating this mixed pressed body.

In the manufacturing process 26 of the second member 12 as well, by going through the same process as the manufacturing process 25 of the first member 11, a second
A member 12 is obtained.

In addition to the above-mentioned methods, the manufacturing method in manufacturing steps 25 and 26 may be powder sintering, casting, forging and machining, or a combination thereof, and the manufacturing method is not limited.

An insert material (mixed crimped body) 13 before the formation of the intermetallic compound was placed between the first member 11 and the second member 12 made of the intermetallic compound obtained through the above steps, and brought into close contact with each other. In some cases, it may be better to temporarily fix it. Temporary + h
Methods of attachment include tying with wire, concave-convex fitting, pressure welding, friction welding, adhesives, brazing, and bolting.

The members 11, 12 and the insert material 13 are heated, for example, in a vacuum atmosphere to a temperature at which an intermetallic compound is formed by a heating device (not shown), and are pressurized, for example, at a pressure of 700 kgr/cm2 in the direction of the arrow in the figure.

In this heat treatment step 31, the pressed mixed body as the insert material 13 forms an intermetallic compound by self-combustion sintering and generates heat at the same time, causing diffusion at the bonding interface between the first member 1 and the second member 2. To become one by combining.

In the heat treatment step 31, the insert material 13 is made of Ti-A.
In the case of 1 type, it is preferable to pressurize to 50 kgf/'cm 2 or more. If the pressure is lower than this, the strength of the composite material will be extremely reduced. In order to obtain a composite material with even higher strength, 2
It is preferable to pressurize to 00 kgf/cm2 or more.

In the case of Ti-Al system, the heat treatment temperature in the heat treatment step 3] may be 400° C. or higher. If the temperature is below 400°C, the processing time will be longer. In addition, the atmosphere in the case of Tj-Al system is
For high-strength composite materials, it is especially good to carry out the process in a vacuum. If done in the atmosphere, oxidation may progress and strength may decrease.

The standard heat of formation of TiAl is ΔH298 = 75KJ/
mol, and if the amount of heat generated during the formation of the intermetallic compound does not escape to the outside, the temperature of the composite will be equal to or higher than the melting point of TiAl, and sufficient heat generation can be obtained. Note that the effect is great when ΔH298 is -40 KJ/mol or less.

Moreover, in the case of Ti-Al system, it is preferable that the temperature increase speed to the above-mentioned heat treatment temperature is 10° C./min or more. At this temperature increase speed, a rapid reaction occurs, so the temperature increase of the composite is sufficient.

Although the whole may be heated using a furnace, it is easier to locally heat the joint portion, and it is also advantageous in suppressing deformation of the members 11 and 12.

Local heating methods include methods using an external heat source such as combustion gas or a heater, and methods in which the member itself generates heat, such as by heating, electric resistance heating, high-frequency induction heating, and frictional heating. Since the mixture forming the intermetallic compound may undergo self-combustion sintering as its end portions are heated, it is also possible to utilize the self-heating generated at that time.

This heat treatment step 31 may be performed in the air, or more preferable results may be obtained if it is performed in an inert gas, vacuum atmosphere, redox atmosphere, or other gas. Furthermore, these atmospheres may be combined. Particularly when heating locally, atmosphere control used in normal welding such as gas arc 1 metal coating arc welding is effective. Also,
Solvents, fluxes, etc. used for brazing may be used.

Note that depending on the material, this heat treatment step 31 may be performed without applying pressure.

When pressure is applied in the heat treatment step 31, the contact area of the joint of composite material A is desirably 0.001 mm2 or more in order to maintain the shape of the composite material and obtain good joint strength, and more preferably 0.001 mm2 or more. .01 mm2 or more is desirable. Moreover, the upper limit of this contact area is not limited by performing the heat treatment step 3 continuously from the ends of the members 11 and 12.

If necessary, f'
It may be possible to improve defects and segregation between the f-shape and the joint, and to disperse impurities.

Further, after the intermetallic compound is formed and bonded in the heat treatment step 31, the composite material A is held at, for example, 1100° C. while maintaining the pressure and vacuum atmosphere as necessary, and the heat treatment step 33 is performed for 3 hours. I do. The treatment temperature is preferably in a temperature range below the common phase line of the intermetallic compound. In particular, when the insert material [3] is Ti-Al based, the temperature is preferably 700°C or higher. At a degree lower than this, sufficient diffusion will not proceed. This heat treatment step 33 may be carried out under normal conditions, or better results may be obtained if it is carried out in an inert gas or a redox atmosphere. Further, depending on the material, this heat treatment step 3B may be performed without applying pressure.

By carrying out the heat treatment step 3B after the formation of the intermetallic compound, it is possible to further reduce the pores contained in the long steel material A, promote uniformity of the structure, eliminate bonding strain, and further improve Diffusion of impurities or removal of impurities can be achieved. By implementing this heat treatment step 33, it is also possible to adjust the size of crystal grains, intermetallic compound structure, or precipitates.

A composite material A in which the first member 11 and the second member [2] are integrated through the insert material 13 through the above series of steps.
or obtained. In this composite material A, both the base material and the joint portion are made of an intermetallic compound (TjAI+Th Al).

FIGS. 4 and 5 are micrographs showing the joints of the composite material A. The insert material 1B is located at the center in FIG. 4 and far to the right in FIG.

There are no localized defects in the joint including insert material 13, and it is virtually continuous with material 11, and the base material and joint have excellent heat resistance and oxidation resistance at Jlj, and have high joint strength. is extremely large. Defects such as holes and cracks found in the joints including the insert material 13 were 100 μm or less, and some were 10 μm or less and some were 1 μm or less. In addition, the porosity is 3% or less or 8 crystals are obtained,
In particular, when a shearing force was applied to the insert material using a -axis press, a material with defects of 1 μm or less and a porosity of 1% or less was obtained.

In practice, defects are less than 1000 μm and porosity is 1096.
In many cases, the following is sufficient, so that the bonded portion including the insert material 13 obtained in this example does not have any defects that would pose a practical problem, and the bonding defects are controlled.
It has good bonding strength.

In addition, the crystal grains in the joint were at most five times the size of the crystal grains in the base material, and many were found to be finer than the crystal grains in the matrix. In practice, the crystal grains of the joint portion including the insert material 13 may be 10 times or less the crystal grains of the base material, so the insert material 1 obtained by this example
There are no coarse crystal grains that would pose a practical problem in the joint containing No. 3, and a high-quality joint structure with a controlled joint structure is obtained.

A finishing step 34 may be performed after the heat treatment step 33 is completed. For example, the surface of the composite material A is made smooth by barrel processing or the like. Alternatively, if the surface is polished by machining, etc., surface scratches may occur.

Removal or cutting of surface layer, etc., 1) Modification or addition of shape by machining or the like, or removal of protruding portions of the insert material. Moreover, if compressive residual stress is generated in the surface layer portion of the composite material A by performing shot pinning or the like, the durability of the composite material A can be further improved.

In addition, the micrographs shown in FIGS. 6 and 7 show T! : AI=64? o: Shows a joint when using a 3690 mixed crimped body. In the figure, the right half is the insert member 13. The first member 11 and the second member 12 in this example are each made of an intermetallic compound (Ti + AI = 64%) as in the previous example.
63%), and the bonding was performed through the same manufacturing process as in the previous example. However, in Fig. 6, the pressure in the heat treatment step 31 is 500 kg f / Cm2, and the heating is 900°C x 1.
Something that took time. Figure 7 shows the heat treatment step 3B after the formation of the intermetallic compound, at 500 kg f/Cm2 and 90
After heat treatment was performed at 0° C. for 1 hour, heat treatment was performed at 1100° C. for 3 hours as necessary. In this example as well, the intermetallic compound (TiAl+Tj3
The first member 11 via the insert material 13 made of
and second member 12 (both TjAI+Ti, AI)
A bonded composite material was obtained. In particular, in the example shown in FIG. 7, the insert material had the same composition and structure as the base material, and a completely uniform composite material was obtained with no localized defects at the joint.

Note that in each of the above embodiments, the first member 11 and the second member 1
Both members 11 and 12 have already formed an intermetallic compound before joining, but like the insert material 13, these two members 11 and 12 have an intermetallic compound formed before the intermetallic compound is formed so that an intermetallic compound is formed during joining. The heat treatment step 31 may be performed in a state where the mixed pressed body is polymerized.

Moreover, the first member 11 and the second member 12 in the present invention
are all Ni, Ni alloy, Inconel, etc.
Base heat-resistant alloy, Ti, Ti alloy 1^1. ^1 Alloy, N
b. High-melting point metals such as Ta, semi-metals such as Si, or intermetallic compounds other than the above examples (Ah Ti, etc.) Inorganic materials such as alumina, ceramics such as silicon nitride 5 silicon carbide, etc., or heat-resistant In some cases, it may also be applicable to organic materials such as plastics. First member 11 and second member 1
It is even better if 2 and the insert material 13 contain one or more elements.

Figures 8 to 19 show various aspects of composite materials.
＜I am doing it.

The composite material shown in FIG. 8 has protrusions 40 on both sides of the insert material 3 in the thickness direction, and the protrusions 40 are used as the first member.
] and the second member [2] are fitted in the recess 4] of the second member [2].

In the example shown in FIG. 9, a sheet-like insert material made by powder rolling is sandwiched between the second member 12 and the second member 12, which are shaped so that they can fit into each other in a convex-concave manner. By heating in a pressurized state in the direction of the arrow, a refuse composite material as shown in FIG. 10 is obtained.

In the compound A shrine shown in Figures 11 and 12,
Through holes 44, 45 in the first member 1] and the second member 2
After inserting the insert material 13 into the through-holes 44 and 45, the insert material 13 is pressed with a mold 50, 5] as shown in FIG. Intermediate compound formation and diffusion bonding are performed simultaneously.

In the composite material shown in FIG. 13, the insert material 13 is electrically heated via electrodes 55 and 56 that are electrically connected to the first member 1 and the second member 12.

In the example shown in FIG. 14, the end of the insert material 13 is directly ignited by the ignition means 60, so that the bonding by self-combustion sintering and diffusion of the intermetallic compound is propagated.

In the composite material shown in FIGS. 15 and 16, the first member 11 and the second part +312 are biaxially separated using a press mold 61, 62, etc. via a pair of inserts +4'13, 13. This is an example in which formation of an intermetallic compound and bonding are performed simultaneously by applying pressure and heating.

The composite material shown in FIG. 17 has a disk-shaped first member]1
This is an example in which the piston head-shaped second member 12 is joined to the end surface of the piston head-shaped second member 12 via an insert material 13.

FIG. 18 shows two types of insert materials 13a.

13b stacked in the thickness direction, the first member 11 made of (TjAl+Ti3AI) and A
1. This is an example in which a second member 12 mainly made of Ti is joined.

One insert material 13a is composed of AI powder of 350 mesh or less produced by gas atomization method and sponge Ti powder of 350 mesh or less in a weight fraction of Ti:A.
l='64%: 3B% is mixed using a dry hole mill purged with Ar gas, and after being pressed into a predetermined shape, it is further molded if necessary. This mixed pressed body is obtained by the heat treatment step 31 (TiAI+T13
Al) becomes an intermetallic compound.

The other insert material 13b is made of A1 powder of 350 mesh or less produced by gas atomization method and sponge T1 powder of 350 mesh or less in a weight fraction of Ti:A.
l-37,179o: Ar at a rate of 62.83%
After mixing using a gas-substituted dry ball mill and pressing into a predetermined shape, the mixture is further molded if necessary. This mixed press-bonded body is made of Alq by the heat treatment step 31.
It becomes an intermetallic compound of Ti.

Like the double-tone material shown in FIG.
13b, and the insert month 1'3
The mixed pressed body 13 c of the same type as b may be polymerized to form a deleterious intermetallic substance. Further, at this time, inorganic fibers may be placed between the first or second member and the insert material or between the insert materials 13a1''3b to improve the strength of the joint or the multitone material.

Further, the present invention is limited to that shown in the above embodiments,
-A! It is also applicable to other compositions of the system.

In particular, the composition ratio of the mixed raw materials used for the insert material 13 should be determined from the mold plate. ote8lka14-[139a, Tika86
In composite materials made of insert materials or Ti-Al intermetallic compounds whose angle is in the range of ~370°, the maximum defect occurs when the porosity of the joint including the insert material is less than 300 due to the large heat generated during the formation of the intermetallic compounds. A high-strength composite material with a thickness of 100 μm or less was obtained. The present invention can also be applied to systems that form other intermetallic compounds.

[Effects of the Invention] According to the present invention, by applying large self-heating generated during the formation of an intermetallic compound to the joints between the insert material, the first member, and the second member, defects at the joint interface can be prevented. It has the effect of promoting diffusion in prevention and bonding, and even if the heating temperature is relatively low, a good bond can be easily obtained in a short time due to self-heating.

In addition, since the intermetallic compound (1) formation and bonding are performed at a temperature considerably lower than the melting point of the intermetallic compound, the bonded part containing the insert material is bonded to the base material despite the low bonding temperature. It can demonstrate the same or higher heat resistance and functionality.

[Brief explanation of drawings]

Fig. 1 is a process explanatory diagram showing the method of the present invention, Fig. 2 is a process explanatory diagram showing an embodiment of the present invention, Fig. 3 is a sectional view showing an example of a composite material, and Fig. 4 is a process explanatory diagram showing an example of the composite material. Micrograph showing the metallographic structure of the joint of the indicated composite material at 100 times magnification, No. 5
The figure is a 200x magnified micrograph of the metal structure showing the example shown in Figure 3, Figure 8 is a cross-sectional view showing an example of Ho≠Ho≠composite material, and Figure 9 shows each member and insert material. 10 is a perspective view of a composite material using the insert material shown in FIG. 9, FIG. 11 is a sectional view showing an example using a rivet-shaped insert material, and FIG. The figure is a cross-sectional view of a composite material using the insert material shown in Figure 11, and Figure 13.
15 through 15 are cross-sectional views showing examples of different composite materials, FIG. 16 is a perspective view of the composite material shown in FIG. 15, and FIGS. 17 and 18 are cross-sectional views showing examples of different composite materials. The cross-sectional view shown in FIG. 19 is a perspective view partially showing an example of a composite material in cross section. DESCRIPTION OF SYMBOLS 11... First member, 12... Second member, 13° 13a, 13b... Insert material. Applicant's agent Patent attorney Takehiko Suzue (Figure 2) Figure 3 (middle) 8. ii 1 turn 1 river ■ river (x 100) 4th Man I's Saemi 〆 joint! Insert material Ipergohe Jshi, 6' (x600) Fig. Joint part Fig. i12 Fig. 13 Fig. Pressure Fig. 14 Fig. Relaxation Fig. 15 Fig. 398 Fig. j! 10 Figure 16 Pressure version 9 Figure 11 Figure 3c j [Figure 19

Claims (2)

[Claims] (1) A composite material in which a first member and a second member are joined to each other via an insert material, the insert material mainly consisting of an intermetallic compound. (2) When the first member and the second member are joined to each other via an insert material, a mixture containing multiple elements mixed in a composition ratio that allows the formation of an intermetallic compound in the material of the insert material; By positioning this insert material across the first member and the second member and heat-treating it at a temperature at which an intermetallic compound is formed, the first member and the second member are bonded together by the heat generated during the formation of the intermetallic compound. A method for manufacturing a composite material, characterized by joining two members to each other.