CN203507962U - High-temperature high-pressure synthesis die - Google Patents

Abstract

The utility model relates to a high-temperature high-pressure synthesis die, which comprises a rectangular block-shaped pyrophylite die body, wherein a high-pressure die cavity which vertically penetrates through is arranged in the middle of the pyrophylite die body, a dolomite composite material ring is arranged in the high-pressure die cavity, conductive steel bowls, the inner cavities of which are filled with pyrophylite composite materials are respectively arranged at the upper end and the lower end of the high-pressure die cavity, the high-temperature high-pressure synthesis die is characterized in that concave pits are formed in the four outer side surfaces of the pyrophylite die body, each concave pit is provided with a lateral boosting unit, and axial boosting units are respectively on the inner sides of the conductive steel bowls at the upper end and the lower end of the high-pressure die cavity. According to the high-temperature high-pressure synthesis die, the maximum pressure of the die cavity can be promoted by more than 20%, and composite materials with more excellent performance can be favorably synthesized under ultrahigh pressure of more than 7GPa; the consumption amount of pyrophylite can be reduced by replacing pyrophylite with the lateral boosting unit; the high-temperature high-pressure synthesis die is simple in structure, convenient to manufacture and use, multiple in boosting unit selectivity, low in production cost, strong in practical value, and capable of being widely applied to industrial production scientific research.

Description

A kind of HTHP synthesizes mould

Technical field

The utility model relates to the synthetic mould of a kind of HTHP, particularly relates to a kind of synthetic mould of HTHP that is applied to diamond synthesis and cubic boron nitride and composite thereof.

Background technology

In the synthetic field of superhard material, what mainly adopt is the Static Catalyst method that cubic hinge press coordinates the synthetic mould of pyrophillite, and the Main Function of pyrophyllite material is pressure transmission, sealing and insulation.When using which supercharging, the maximum pressure of pyrophillite synthetic cavity could not be broken through 6GPa all the time, at chamber pressure, surpass after 5GPa, the major part of cubic hinge press loads and is consumed on the sealing strip of pyrophillite, chamber pressure sharply declines with the efficiency that loads increase, if further increase to load, will make top hammer destroy and the very large production cost of increase.But, the material that some are important and industrial production material there will be some new characteristics more than 6GPa, such as polycrystalline diamond, at pressure, surpass after 6GPa, can there is more moulding deformation in diamond particles, thereby diamond particles and intergranular interface are fully contacted and can between diamond particles, form a large amount of D-D bondings, obtain high relative density, high-wearing feature, the diamond composite of high rigidity (J. Qian, G. Voronin, et al., J. Mater. Res. 17, 2153 2002), diamond compact is exactly one of them, pressure is more high is more conducive to synthesize high-quality diamond compact.There is few large cavity ultra-high pressure apparatus higher than 6GPa to be suggested before, but change the reasons such as excessive, production cost is high, making or operating process complexity because of synthetic mode structure, cannot be widely used industrial.

Summary of the invention

Technical problem to be solved in the utility model is that the deficiency that overcomes above-mentioned prior art existence provides a kind of HTHP to synthesize mould, and it can not only make the maximum pressure of pyrophillite synthetic cavity reach 7GPa, and simple in structure, easy to use.

The utility model is that the technical scheme that the problem of the above-mentioned proposition of solution adopts is: the pyrophillite die body that comprises rectangular block shape, the middle part of pyrophillite die body arranges the high compression mold cavities of upper and lower break-through, in high compression mold cavities, install dolomite composite material ring, the Conducting steel bowl of inner chamber filling pyrophillite composite is installed respectively at the two ends up and down of high compression mold cavities, four lateral surfaces that it is characterized in that described pyrophillite die body are provided with pit, each pit disposes side direction compress cell, configures respectively axial pressurizing unit at the two ends up and down of high compression mold cavities Conducting steel bowl inner face simultaneously.

Press such scheme, it is block that described side direction compress cell is, and cross sectional shape is identical with pit cross sectional shape, is rectangle, circle, ellipse or hexagon.

Press such scheme, described pit is positioned at the middle part of pyrophillite die body lateral surface, and the base area of pit is 10 ~ 62% of pyrophillite die body lateral surface area.

Press such scheme, described side direction compress cell is one or more layers, any in alundum (Al2O3), magnesia, cubic boron nitride, hexagonal boron nitride, iron, tungsten carbide, or any two or more composites in them are made.

Press such scheme, the pyrophillite thickness of described pit bottom surface is not less than 2mm.

Press such scheme, described axial pressurizing unit is installed in respectively the upper and lower side of dolomite composite material ring inner chamber, and the cross sectional shape of axial pressurizing unit is identical with dolomite composite material ring intracavity section shape.

Press such scheme, described axial pressurizing unit is one or more layers, any one or more in iron, tungsten carbide, molybdenum, titanium, zirconium, niobium, tungsten, or any alloy in them is made.

Press such scheme, the thickness of described axial pressurizing unit is equal to or greater than 2mm.

Press such scheme, described pyrophillite die body and dolomite composite material ring are involuted by upper and lower two parts.

The beneficial effects of the utility model are: 1, by setting up compress cell, greatly improved the pressure transmission efficiency of die cavity, the maximum pressure of die cavity is promoted more than 20%, produced super-pressure more than 7GPa, be conducive to synthesize the composite that performance is more excellent; 2, the utility model has retained traditional pyrophillite as encapsulant, therefore when improving pressure transmission efficiency, has kept the good sealing property of synthetic mould, is conducive to the target material of synthetic stable performance; Adopt side direction compress cell partly to substitute pyrophillite simultaneously, press the synthetic mould of pyrophillite to compare the use amount of having saved pyrophillite with traditional powder; 3, the utility model is simple in structure, making and easy to use, and compress cell alternative is many, and production cost is low, and practical value is strong, can be widely used in industrial production and scientific research.

Accompanying drawing explanation

Fig. 1 is the positive view of an embodiment of the utility model.

Fig. 2 is the A-A cutaway view in Fig. 1.

Fig. 3 is the side view of Fig. 1.

Fig. 4 is the stereogram of side direction compress cell in embodiment of the utility model.

Fig. 5 is the stereogram of axial compress cell in embodiment of the utility model.

The specific embodiment

Below in conjunction with accompanying drawing, the utility model is further illustrated.

The pyrophillite die body 6 that comprises rectangular block shape, the middle part of pyrophillite die body arranges the high compression mold cavities 7 of upper and lower break-through, in high-pressure membrane chamber, install dolomite composite material ring 2, dolomite composite material ring is circular rings, the Conducting steel bowl 4 of inner chamber filling pyrophillite composite 5 is installed respectively at the two ends up and down of high compression mold cavities, described Conducting steel bowl is flat cup-shaped, the pyrophillite composite of inner chamber filling cylinder bulk, and pyrophillite composite is towards interior; Four lateral surfaces of described pyrophillite die body are provided with pit, and pit cross sectional shape is rectangle, and there is circular arc chamfering at four angles, and described pit is positioned at the middle part of pyrophillite die body lateral surface, and the base area of pit is 30% of pyrophillite die body lateral surface area; Each pit disposes side direction compress cell 1, the described rectangular bulk of side direction compress cell, and cross sectional shape is identical with pit cross sectional shape, by alundum (Al2O3), is made; At the two ends up and down of high compression mold cavities Conducting steel bowl inner face, configure respectively axial pressurizing unit simultaneously, described axial pressurizing unit is installed in respectively the upper and lower side of dolomite composite material ring 2 inner chambers, the cross sectional shape of axial pressurizing unit is identical with dolomite composite material ring intracavity section shape, for circular block, described axial pressurizing unit is one deck, be fabricated from iron, thickness is 4mm.Described pyrophillite die body and dolomite composite material ring are involuted by laterally zygomorphic two parts.

The utlity model has simple in structure, the easy feature of assembling, and can arbitrarily change as required the compress cell of different size or unlike material.

Implementation procedure of the present utility model: first by dolomite composite material ring pre-molding in mould, then dolomite composite and pyrophillite are placed in specific mould and are pressed into one.During assembling, the latter half of mould is synthesized in first assembling, in the cavity of lower half block pyrophillite die body and dolomite composite material ring, put into successively Conducting steel bowl and the axial pressurizing unit of inner chamber filling pyrophillite composite, reinstall heating element heater and work piece, then above upper half block pyrophillite and dolomite composite material ring being fastened on, put into the Conducting steel bowl of axial pressurizing unit and inner chamber filling pyrophillite composite, finally 4 side direction compress cells on four side assemblings of pyrophillite die body.Form thus the synthetic mould of HTHP, just can putting into cubic hinge press, to carry out HTHP synthetic.The application of side direction compress cell, has not only promoted the pressure transmission efficiency of synthetic mould, can effectively block the motion of hot gas simultaneously, reduces the amount of going out of hot gas, and protection non-heated anvil extends service life of non-heated anvil.

Claims (9)

1. a HTHP synthesizes mould, the pyrophillite die body that comprises rectangular block shape, the middle part of pyrophillite die body arranges the high compression mold cavities of upper and lower break-through, in high compression mold cavities, install dolomite composite material ring, the Conducting steel bowl of inner chamber filling pyrophillite composite is installed respectively at the two ends up and down of high compression mold cavities, four lateral surfaces that it is characterized in that described pyrophillite die body are provided with pit, each pit disposes side direction compress cell, configures respectively axial pressurizing unit at the two ends up and down of high compression mold cavities Conducting steel bowl inner face simultaneously.

2. the synthetic mould of HTHP according to claim 1, is characterized in that described side direction compress cell is block, and cross sectional shape is identical with pit cross sectional shape, is rectangle, circle, ellipse or hexagon.

3. the synthetic mould of HTHP according to claim 1 and 2, it is characterized in that described pit is positioned at the middle part of pyrophillite die body lateral surface, and the base area of pit is 10 ~ 62% of pyrophillite die body lateral surface area.

4. the synthetic mould of HTHP according to claim 1 and 2, is characterized in that described side direction compress cell is for one or more layers, any the making in alundum (Al2O3), magnesia, cubic boron nitride, hexagonal boron nitride, iron, tungsten carbide.

5. the synthetic mould of HTHP according to claim 3, is characterized in that the pyrophillite thickness of described pit bottom surface is not less than 2mm.

6. HTHP according to claim 1 and 2 synthesizes mould, it is characterized in that described axial pressurizing unit is installed in respectively the upper and lower side of dolomite composite material ring inner chamber, the cross sectional shape of axial pressurizing unit is identical with dolomite composite material ring intracavity section shape.

7. the synthetic mould of HTHP according to claim 6, is characterized in that described axial pressurizing unit is for one or more layers, any in iron, tungsten carbide, molybdenum, titanium, zirconium, niobium, tungsten, or any alloy in them is made.

8. the synthetic mould of HTHP according to claim 6, is characterized in that the thickness of described axial pressurizing unit is equal to or greater than 2mm.

9. the synthetic mould of HTHP according to claim 1, is characterized in that described pyrophillite die body and dolomite composite material ring are involuted by upper and lower two parts.

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