CN106041109A - Multi-layer shell-core structure CoxCuyPbz alloy particle and preparation method thereof - Google Patents
Multi-layer shell-core structure CoxCuyPbz alloy particle and preparation method thereof Download PDFInfo
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- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 40
- 239000000956 alloy Substances 0.000 title claims abstract description 40
- 238000002360 preparation method Methods 0.000 title claims abstract description 25
- 239000002245 particle Substances 0.000 title abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 15
- 238000005275 alloying Methods 0.000 claims description 43
- 239000008188 pellet Substances 0.000 claims description 39
- 239000010453 quartz Substances 0.000 claims description 23
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 23
- 238000012360 testing method Methods 0.000 claims description 22
- 229910052756 noble gas Inorganic materials 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 17
- 229910002465 CoxCuy Inorganic materials 0.000 claims description 13
- 230000000694 effects Effects 0.000 claims description 12
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/10—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying using centrifugal force
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Abstract
The invention belongs to the field of immiscible alloy particles, and particularly discloses a multi-layer shell-core structure CoxCuyPbz alloy particle and a preparation method thereof. According to the method, a solidification forming device is utilized, and the hollow CoxCuyPbz alloy particle is prepared through the reasonably-designed alloy composition proportion, the pressure of two vacuum chambers and the roller surface linear speed of a Cu roller. The prepared shell-core alloy particle is high in sphericity and smooth in surface; no breaking or hole appear in a shell-core layer; only a solidification reaction happens inside; a precipitated phase is simple; the operation process is simple; and cost is low.
Description
Technical field
The invention belongs to immiscible alloy granule field, be specifically related to a kind of multilayered shell nuclear structure CoxCuyPbzAlloying pellet
And preparation method thereof.
Background technology
Metallic particles, as the common raw material of industry, obtains at high-technology fields such as automobile, metallurgy, electronics, aerospace, medicine
To being widely applied.Especially immiscible alloy granule, is pushed away in various fields with the physical and mechanical properties that it is superior
Extensively, in prepared by material, cause more and more concern, become material supply section educational circles and fall over each other the focus of research.The most difficult miscible Co-Cu-
Pb alloying pellet has good antiwear characteristic and prominent giant magnetoresistance effect, is expected to as Solid Self-lubricant Bearing anti-attrition material
Material and superconductor material, electrical contact material aspect are applied.But immiscible alloy due between constituent element density variation big or
Fusing point differs greatly, and serious segregation and lamination often occurs, it is conventionally believed that this point during conventional coagulation
Layer material does not has any value, but along with the further intensification of research, after 20 century 70s, space science and technology
Fast development, under space microgravity environment, eliminates the free convection of weight-driven, deposition and the impact of the factor such as floating, can
With obtain the second phase even dispersion be distributed in matrix mutually in material, be even found that and be similar to egg yolk, Ovum Gallus domesticus album structure
Multilayered shell core tissue, it has the biggest application potential and value.Although this is owing to shell core tissue has lamination, but
Its each layer tissue eliminates the impact of the factors such as gravity, has obtained the equally distributed complex tissue of disperse, eliminates serious inclined
Analysis phenomenon, it is achieved that the tissue of immiscible alloy homogenizes, and is expected to be applied in terms of the purification that homogenizes of immiscible alloy.
Preparing about the core-shell structure being mainly nano-particle in the preparation of core-shell structure at present, preparation method has microgravity
Preparation, water heat transfer etc. under environment or under ultrasonic environment.These technologies of preparing can preferably prepare the shell with layering
Nuclear structure, but it is primarily directed to the preparation of nano-particle, it is impossible to carry out the preparation of immiscible alloy shell nuclear particle, and preparation takes
With higher, technological process is complicated, and equipment requirements is high, and operating difficulties is not easy to realize the preparation of volume production material, seriously limits shell
The industrialization of nuclear particle；And the freely falling body tube method that falls that Wang Haipeng et al. uses virtual space space environment is successfully prepared metal
The core-shell structure of alloy, and find that its interior tissue uniformity is improved, but this preparation method simulation space condition
More strict, and the expense of preparation is too high, is not easy to popularize in an all-round way.Along with the fast development of the industry such as Aero-Space, microelectronics,
It is badly in need of realizing the process that immiscible alloy homogenizes and i.e. prepares the preparation of the special material such as alloying pellet with core-shell structure,
Its technology of preparing becomes the key factor of development.
Summary of the invention
It is an object of the invention to propose a kind of multilayered shell nuclear structure CoxCuyPbzAlloying pellet and preparation method thereof.
For achieving the above object, the technical scheme that the present invention takes is as follows:
A kind of multilayered shell nuclear structure CoxCuyPbzThe preparation method of alloying pellet (in terms of mass fraction, subscript x, y, z generation respectively
Number shared by Co, Cu, Pb in 100 parts of alloying pellets of table, and x+y+z=100, the most in like manner, repeat no more), its special feature
It is:
The method utilizes a coagulation forming device, and this device includes the first vacuum chamber and is positioned at second vacuum chamber at its top,
First vacuum chamber and the second vacuum chamber are connected by vacuum chamber conducting valve, and the first vacuum chamber passes through evacuation conducting valve with outer simultaneously
The vacuum pump in portion is connected, and the second vacuum chamber is connected with outside noble gas tank by noble gas conducting valve；First vacuum chamber
Inside being provided with motor, Cu roller, receptor, motor and Cu roller drive connection, receptor is positioned at the front position of Cu roller direction of rotation；The
Sealing on the contact surface of one vacuum chamber and the second vacuum chamber and be inserted with quartz test tube, one section of quartz test tube top is positioned at the second vacuum
Indoor, remaining section is positioned at the first vacuum chamber and this section of outside is provided with induction coil, and quartz test tube bottom offers nozzle, spray
Mouth is the most right with the roll surface of Cu roller；Induction coil and motor self-corresponding control device for opening each with outside are connected；Said external is equal
Refer to the first vacuum chamber and the outside of the second vacuum chamber；
The method utilizes coagulation forming device to prepare multilayered shell nuclear structure CoxCuyPbzThe step of alloying pellet is as follows:
S1, foundation subject alloy CoxCuyPbzThe mass ratio of middle Co, Cu, Pb weighs metal Co, Cu and Pb, puts into quartz test tube
In, then quartz test tube sealing is plugged on the contact surface of the first vacuum chamber and the second vacuum chamber；Wherein x=y=45 ~ 47.5, z=5
~10；
S2, it is first shut off noble gas conducting valve, opens evacuation conducting valve and vacuum chamber conducting valve, start vacuum pump to two
Close evacuation conducting valve after vacuum chamber, be then turned on noble gas conducting valve, be filled with noble gas；It is again switched off lazy
Property gas communication valve evacuation is filled with noble gas, repeatable operation 5 ~ 7 times；After last evacuation is filled with noble gas,
Making vacuum in two vacuum chambers is 0.5 ± 0.05Kpa, closes vacuum chamber conducting valve and noble gas conducting valve；
S3, the control device for opening of unlatching induction coil, sample in heated quartz test tube so that it is fusing overheated 100 more than K,
After insulation 3 ~ 5 min, after the control device for opening of unlatching motor drives Cu roller to rotate and observes the rotation steadily of Cu roller, regulation is electric
The angular velocity of machine makes the roll surface speed of Cu roller be 15 ~ 30 m/s, opens noble gas conducting valve, and in quartz test tube, aluminium alloy exists
The Cu roller surface being ejected into rotation under relative pressure difference effect is cooled into multilayered shell nuclear structure CoxCuyPbzAlloying pellet, and quilt
Cu roller tangentially throws away and is collected in receptor.
Preferably, CoxCuyPbzIt is preferably Co47.5Cu47.5Pb5, in two vacuum chambers, vacuum is preferably 0.5Kpa, Cu roller
Roll surface speed is preferably 30 m/s.
Preferably, the all-transparent vacuum chamber that the first vacuum chamber and the second vacuum chamber preferably pmma material are made.
Preferably, the volume of the first vacuum chamber is preferably greater than the volume of the second vacuum chamber.
Preferably, receptor is preferably in Y type.
Multilayered shell nuclear structure Co prepared by aforementioned preparation processxCuyPbzAlloying pellet.
Its general principles: after the sensed heating of alloy, being passed through noble gas from quartz test tube top, aluminium alloy is lazy
Property gas pressure under overcome surface tension be sprayed onto from the nozzle of quartz ampoule bottom lower section high speed rotating Cu roller surface, aluminium alloy
Throw forward at the moment quick solidification contacted with Cu roller surface and under the centrifugal action that Cu roller rotates with granular form
Shoot out；The present invention utilizes rapid solidification molding device, by changing Cu roller rotating speed, it is possible to achieve control alloy shell nuclear particle
Cooldown rate, and then change its roll surface shearing force size and internal cooling mechanism, make aluminium alloy under shear action weightless and
High speed rotating, this environmental classes is similar to weightlessness of space environment, therefore can finally obtain multilayered shell core alloying pellet.Formed with volcanic ash
Process is similar to, and melt ties up to temperature, pressure and flow velocity etc. and assembles in the case of suitably, through rapid solidification process, permissible
Make the formation that alloy is layered mutually, the final granule realizing there is core-shell structure.
Beneficial effect:
1, coagulation forming device of the present invention has the following characteristics that employing vacuum chamber, can be effectively prevented alloy in fusing with quick
Process of setting aoxidizes；Vacuum chamber uses pmma material to make, it is simple to enter the rapid solidification of alloying pellet
The monitoring of row omnibearing visual；Select the adjustable single-phase asynchronous high-speed electric expreess locomotive of angular velocity, roll surface speed control can be realized.
2, the shell core alloying pellet sphericity that the present invention prepares is higher, and smooth surface, shell stratum nucleare crack-free or cavity go out
Existing, only there is Hirschfeld-Klinger reaction in inside, and precipitated phase is simple, and operating process is simple, and expense is relatively low.
3, the present invention is as the novel preparation technology of shell core alloying pellet, it is provided that higher roll surface speed is i.e. sheared
Power, makes the breakup of drop, and rapid solidification has big cooldown rate, can improve nucleation rate, shortens crystal grain and grows up the time, promotes
Solidified structure refines, and reduces segregation, it is achieved core-shell structure homogenizes.
Accompanying drawing explanation
Fig. 1: the structural representation of coagulation forming device.
The Co of Fig. 2: core-shell structure47.5Cu47.5Pb5Alloying pellet tissue and EDS energy spectrum analysis: (a) microstructure；(b)
EDS collection of illustrative plates at position 1；EDS collection of illustrative plates at (c) position 2；EDS collection of illustrative plates at (d) position 3.
The impact of Fig. 3: alloying component proportioning, vacuum, roller speed pattern final on alloying pellet: (a)
Co42.5Cu42.5Pb15Alloying pellet rapid solidification structure under roller speed 30 m/s, 0.5Kpa；(b) Co47.5Cu47.5Pb5Alloy
Granule rapid solidification structure under roller speed 50 m/s, 0.5Kpa.
Detailed description of the invention
Below the description of specific embodiment elaborates a lot of detail so that fully understanding the present invention, but this
Invention can also use other to be different from alternate manner described here to implement, therefore the present invention not by following public specifically
The restriction of embodiment.
Embodiment 1
A kind of multilayered shell nuclear structure Co47.5Cu47.5Pb5The preparation method of alloying pellet, it is particular in that:
The method utilizes a coagulation forming device, as it is shown in figure 1, this device includes the first vacuum chamber 1 and is positioned at its top
Second vacuum chamber 2, the all-transparent vacuum chamber that the first vacuum chamber 1 and the second vacuum chamber 2 are made for pmma material, the first vacuum
The volume of room 1 is connected by vacuum chamber conducting valve 3 with the second vacuum chamber 2 more than the volume of the second vacuum chamber 2, the first vacuum chamber 1,
First vacuum chamber 1 is connected with outside vacuum pump (not shown) by evacuation conducting valve 4 simultaneously, and the second vacuum chamber 2 passes through Ar
Gas conducting valve 5 is connected with outside Ar gas tank (not shown)；Be provided with motor (not shown) in first vacuum chamber 1, Cu roller 6, Y type connect
Receiving device 7, motor and Cu roller 6 drive connection, receptor 7 is positioned at the front position of Cu roller 6 direction of rotation；First vacuum chamber 1 and
Sealing on the contact surface of two vacuum chambers 2 and be inserted with quartz test tube 8, one section of quartz test tube 8 top is positioned at the second vacuum chamber 2, remaining
Section is positioned at the first vacuum chamber 1 and this section of outside is provided with induction coil 9, and quartz test tube 8 bottom offers nozzle, nozzle and
The roll surface of Cu roller 6 is the most right；Induction coil 9 and motor self-corresponding control device for opening (not shown) each with outside are connected；Aforementioned
Outside refers both to the first vacuum chamber 1 and outside of the second vacuum chamber 2；
The method utilizes coagulation forming device to prepare multilayered shell nuclear structure Co47.5Cu47.5Pb5The step of alloying pellet is as follows:
S1, foundation subject alloy Co47.5Cu47.5Pb5The mass ratio of middle Co, Cu, Pb weighs high-purity (99.99%) button ingot metal
Co, Cu and Pb, total metal mass is 1 g, puts into the quartz test tube 8 that bottom has Ф 16 mm × 150 mm of Ф 1 mm nozzle
In, then quartz test tube 8 sealing is plugged on the contact surface of the first vacuum chamber 1 and the second vacuum chamber 2；
S2, it is first shut off Ar gas conducting valve 5, opens evacuation conducting valve 4 and vacuum chamber conducting valve 3, start vacuum pump to two
Vacuum chamber closes evacuation conducting valve 4 to about 1Kpa, is then turned on Ar gas conducting valve 5, is filled with Ar gas；It is again switched off
Ar gas conducting valve 5 evacuation is filled with Ar gas, repeatable operation 6 times；After last evacuation is filled with Ar gas, make two vacuum chambers
Interior vacuum is 0.5Kpa, closes vacuum chamber conducting valve 3 and Ar gas conducting valve 5；
S3, the control device for opening of unlatching induction coil 9, sample in heated quartz test tube 8 so that it is fusing overheated 100 K, protect
After temperature 5 min, open the control device for opening of motor and drive Cu roller 6 to rotate and observe after Cu roller 6 rotates steadily, regulate motor
Angular velocity make the roll surface speed of Cu roller 6 be 30 m/s, open Ar gas conducting valve 5, in quartz test tube 8, aluminium alloy is in pressure relatively
Cu roller 6 surface being ejected into rotation under power difference effect is cooled into multilayered shell nuclear structure Co47.5Cu47.5Pb5Alloying pellet, and quilt
Cu roller 6 tangentially throws away and is collected in receptor 7.
The Co that the present embodiment is formed47.5Cu47.5Pb5Alloying pellet tissue is shown in three positions shown in Fig. 2 a, Fig. 2 a
Fig. 2 b-d is shown in EDS energy spectrum analysis respectively.As shown in Figure 2 a, aluminium alloy presents obvious light and shade under the effect of cross shear
Alternate shell core hierarchy, and the layering of its light and shade shell core reaches 3 layers more than, with 2 layers of egg structure that in the past research occurred
Result is different.By further EDS energy spectrum analysis (Fig. 2 b-d): Co47.5Cu47.5Pb5The granule of alloy core-shell structure
Outermost layer white shelly component of organization is Cu phase component, itself and white phase composition one in the bulb tissue of innermost layer bulk distribution
Causing, the composition of secondary outer layer dark gray zones tract tissue is Co phase component, and phase composition is simple, and microstructure homogenization is obvious, and at each layer shell
In structure, disperse is mingled with the dark structure of distribution is Pb phase, there is no obvious Pb phase segregation phenomenon and occurs.
Existing research has shown that: difficult miscible Co-Cu-Pb alloying pellet has good antiwear characteristic and prominent huge magnetoelectricity
Inhibition effect, is expected to be applied as Solid Self-lubricant Bearing antifriction material and superconductor material, electrical contact material aspect.But
Immiscible alloy, owing between constituent element, density variation is big or fusing point differs greatly, often occurs serious during conventional coagulation
Segregation phenomena, limits its application.But multilayered shell nuclear structure Co prepared by the present invention47.5Cu47.5Pb5Alloying pellet eliminates
Serious segregation phenomena, it is achieved that the tissue of immiscible alloy homogenizes so that it is application becomes " real " from " being expected to ".
Reference examples 1--same roller speed and vacuum, the alloying pellet tissue contrast that different-alloy proportioning is formed
Alloy proportion is designed as Co42.5Cu42.5Pb15, in two vacuum chambers vacuum be the roll surface speed of 0.5Kpa, Cu roller be 30
M/s, other are with embodiment 1.
Co42.5Cu42.5Pb15Alloying pellet rapid solidification structure under roller speed 30 m/s, 0.5Kpa is shown in Fig. 3 a.
The compositional factors of alloy actually or the hot physical property of alloy impact, such as surface tension, fusing point and density etc..
They determine in Ke He mechanism the distribution situation of component of organization in hierarchy number and core and each layer.Such as, due to CoxCuyPbz
Immiscible alloy exists the density variation between alloying element big, easily form liquid phase separation, and then form shell core lamination；
For core in Ke He mechanism and each composition of layer be distributed affect situation for, owing in alloy, the surface tension of Cu is little, so
Rich Cu, during solidifying phase separates, is more biased towards in the surface outermost layer being enriched in core-shell particle, and is at internal core
The composition that surface tension is big；In addition due in composition fusing point between element different, drop internal core surfaces temperature is higher, therefore
The rich Co phase that fusing point is high just easily concentrates on shell core center.Influencing each other between these thermal physical characteristics, decides
The situation that whole shell core layering is formed.In rapid solidification, along with temperature declines, melt is risen and fallen by fluctuation of energy and solubility
Starting forming core, different liquid phases is made random motion under the effect of Brownian movement and mutually collides coalescence, shape of growing up rapidly
Become drop cluster, and when drop size is more than time to a certain degree, and drop is under the centrifugal action that high speed Cu roller is formed, aloft
Rotating formation rapidly, the factor such as density variation between now Marangoni convection current constituent element each with alloy starts into takes as the leading factor, at this
Under the influence of, there is relative motion in two main liquid phase Co and Cu, starts biphase migration occur.In the alloying element chosen in the present invention
Only 5%Pb content, this is owing to Pb highly volatile in melt heating process forms Pb steam, and Pb element is first with Co, Cu
Element is immiscible, more exacerbates the volatilization of Pb steam.Therefore in rapid solidification, under same vacuum pressure effect, by changing
Alloying pellet component, increases Pb content in alloy, improves the volatilization of Pb steam, and disorderly air-flow and the Pb volatilized will be made to steam
Vapour enters inside alloy liquid droplet under shear action, ultimately forms special hollow-core construction alloying pellet, and non-laminar shell core
Constructional alloy granule, is Co as shown in Figure 3 a42.5Cu42.5Pb15Alloying pellet rapid solidification under roller speed 30 m/s, 0.5Kpa
Tissue.Under the conditions of same roller speed 30 m/s, 0.5Kpa, due to the change of alloy compositions proportioning, the increase of Pb content, final
Arrive hollow-core construction alloying pellet.
The same alloy proportion of reference examples 2--and vacuum, the alloying pellet tissue contrast that differential roller speed is formed
Alloy proportion is designed as Co47.5Cu47.5Pb5, in two vacuum chambers vacuum be the roll surface speed of 0.5Kpa, Cu roller be 50
M/s, other are with embodiment 1.
Co47.5Cu47.5Pb5Alloying pellet rapid solidification structure under roller speed 30 m/s, 0.5Kpa is shown in Fig. 3 b.
Under rapid solidification condition, roller speed is to prepare the leading factor of hollow alloying pellet.Higher roller speed on the one hand can
Thering is provided bigger shearing force, alloy liquid droplet is broken, then forms spherical shape under surface tension effects, on the other hand makes to close
Gold grain quickly rotates, and drop is dished out quickly cooling with parabolic path by Cu roller under the effect of high shear force, the most rapidly
Rotating, due to the effect of centrifugal force, in melt drop, each liquid phase is under the influence of the differences such as Marangoni convection current and density, starts
Moving to migrate along radius of a ball all directions and assemble, ultimately form lamination, the shearing force that therefore differential roller speed is formed is shell core knot
The formation of structure provides the condition of necessity.The shearing force that less roller speed is formed is too small, and Marangoni convection action is the most weak, no
It is easily formed the layering cohesion of each phase liquid phase, and the excessive shearing force that bigger roller speed belt comes is it is also possible that the liquid phase after Fen Ceng is high
Speed rotates, and owing to the composition of each layer is different, its shell stratum nucleare shape density formed, surface tension are different with liquid sticky power, cause
Each layer liquid phase forms liquid phase disorder flowing, finally can not the spherical shape layer structure of formation rule, such as Fig. 3 b Co47.5Cu47.5Pb5
Alloying pellet rapid solidification structure under roller speed 50 m/s, 0.5Kpa.Three layers of core-shell structure surface imperfection spherical shape, and respectively
There is skew, not at the same centre of sphere in layer liquid center.Meanwhile, bigger roller speed causes multilayered shell nuclear structure alloying pellet
There is face crack, broken phenomenon due to the effect of shearing force in outermost surface.
To sum up embodiment 1 and reference examples 1, the 2 final morphology analysis of product understand: in the present invention, alloying component proportioning, two
Vacuum chamber pressure, Cu roller roll surface speed pattern final on product be formed with vital impact.In the present invention, only
Comply fully with Co47.5Cu47.5Pb5Rapid solidification condition under alloying component, roller speed 30 m/s, 0.5Kpa, could finally prepare
Go out the multilayered shell nuclear structure alloying pellet of rule.
Claims (6)
1. a multilayered shell nuclear structure CoxCuyPbzThe preparation method of alloying pellet, in terms of mass fraction, subscript x, y, z is respectively
Represent the number shared by Co, Cu, Pb in 100 parts of alloying pellets, and x+y+z=100, it is characterised in that:
The method utilizes a coagulation forming device, and this device includes the first vacuum chamber and is positioned at second vacuum chamber at its top,
First vacuum chamber and the second vacuum chamber are connected by vacuum chamber conducting valve, and the first vacuum chamber passes through evacuation conducting valve with outer simultaneously
The vacuum pump in portion is connected, and the second vacuum chamber is connected with outside noble gas tank by noble gas conducting valve；First vacuum chamber
Inside being provided with motor, Cu roller, receptor, motor and Cu roller drive connection, receptor is positioned at the front position of Cu roller direction of rotation；The
Sealing on the contact surface of one vacuum chamber and the second vacuum chamber and be inserted with quartz test tube, one section of quartz test tube top is positioned at the second vacuum
Indoor, remaining section is positioned at the first vacuum chamber and this section of outside is provided with induction coil, and quartz test tube bottom offers nozzle, spray
Mouth is the most right with the roll surface of Cu roller；Induction coil and motor self-corresponding control device for opening each with outside are connected；Said external is equal
Refer to the first vacuum chamber and the outside of the second vacuum chamber；
The method utilizes coagulation forming device to prepare multilayered shell nuclear structure CoxCuyPbzThe step of alloying pellet is as follows:
S1, foundation subject alloy CoxCuyPbzThe mass ratio of middle Co, Cu, Pb weighs metal Co, Cu and Pb, puts into quartz test tube
In, then quartz test tube sealing is plugged on the contact surface of the first vacuum chamber and the second vacuum chamber；Wherein x=y=45 ~ 47.5, z=5
~10；
S2, it is first shut off noble gas conducting valve, opens evacuation conducting valve and vacuum chamber conducting valve, start vacuum pump to two
Close evacuation conducting valve after vacuum chamber, be then turned on noble gas conducting valve, be filled with noble gas；It is again switched off lazy
Property gas communication valve evacuation is filled with noble gas, repeatable operation 5 ~ 7 times；After last evacuation is filled with noble gas,
Making vacuum in two vacuum chambers is 0.5 ± 0.05Kpa, closes vacuum chamber conducting valve and noble gas conducting valve；
S3, the control device for opening of unlatching induction coil, sample in heated quartz test tube so that it is fusing overheated 100 more than K,
After insulation 3 ~ 5 min, after the control device for opening of unlatching motor drives Cu roller to rotate and observes the rotation steadily of Cu roller, regulation is electric
The angular velocity of machine makes the roll surface speed of Cu roller be 15 ~ 30 m/s, opens noble gas conducting valve, and in quartz test tube, aluminium alloy exists
The Cu roller surface being ejected into rotation under relative pressure difference effect is cooled into multilayered shell nuclear structure CoxCuyPbzAlloying pellet, and quilt
Cu roller tangentially throws away and is collected in receptor.
2. preparation method as claimed in claim 1, it is characterised in that: CoxCuyPbzFor Co47.5Cu47.5Pb5, in two vacuum chambers
Vacuum be the roll surface speed of 0.5Kpa, Cu roller be 30 m/s.
3. preparation method as claimed in claim 1, it is characterised in that: the first vacuum chamber and the second vacuum chamber are lucite material
The all-transparent vacuum chamber that material is made.
4. preparation method as claimed in claim 3, it is characterised in that: the volume of the first vacuum chamber is more than the appearance of the second vacuum chamber
Long-pending.
5. preparation method as claimed in claim 1, it is characterised in that: receptor is Y type.
6. the multilayered shell nuclear structure Co that prepared by the preparation method as described in any one of claim 1 ~ 5xCuyPbzAlloy
Grain.
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| JPH03130309A (en) * | 1989-10-14 | 1991-06-04 | Nippon Steel Corp | Device for removing metal in pouring nozzle for mish metal alloy |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH03130309A (en) * | 1989-10-14 | 1991-06-04 | Nippon Steel Corp | Device for removing metal in pouring nozzle for mish metal alloy |
| JP2006269870A (en) * | 2005-03-25 | 2006-10-05 | Matsushita Electric Works Ltd | Method of manufacturing thermoelectric material |
| CN101560615A (en) * | 2009-05-15 | 2009-10-21 | 西安理工大学 | Method for preparing metallic hollow microsphere powder |
| JP2015071817A (en) * | 2013-10-04 | 2015-04-16 | トヨタ自動車株式会社 | Apparatus and method for production of quickly-chilled ribbon for rare-earth magnet |
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| N. YAN等: "Complex phase separation of ternary Co–Cu–Pb alloy under containerless processing condition", 《JOURNAL OF ALLOYS AND COMPOUNDS》 * |
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