Coarse particle polycrystalline diamond synthesizing technology

A technology of polycrystalline diamond and synthesis process, which is applied in the application of ultra-high pressure process, etc., can solve the problems of low impact toughness, poor thermal stability, and low yield of polycrystalline diamond, and achieve irregular shape, rough surface, and impurities little effect

Active Publication Date: 2014-07-30
HENAN FAMOUS DIAMOND IND CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the current polycrystalline diamond products have low output, low quality, small particles, low strength, low impact toughness, and poor thermal stability.

Method used

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  • Coarse particle polycrystalline diamond synthesizing technology

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] like figure 1 The synthetic process of coarse-grained polycrystalline diamond shown comprises the following steps:

[0019] 1) Put the synthetic block into the press;

[0020] 2), Boost to 8MPa within 0~60s;

[0021] 3) Boost the pressure from 8MPa to 40MPa within 60s~120s, and increase the heating power from 0 to 8kw at the same time;

[0022] 4) Slowly increase the pressure from 40MPa to 65MPa within 120s~180s, then keep the pressure for 60s, and keep the heating power at 8kw for 240s;

[0023] 5) Slowly increase the pressure from 65MPa to 70MPa within 240s ~ 480s, and then hold the pressure for 120s; slowly reduce the heating power from 8kw to 7.6kw within 360s ~ 600s;

[0024] 6) The pressure is reduced from 70MPa to 60MPa within 600s~660s, and the heating power is suddenly dropped from 7.6kw to 1.5kw;

[0025] 7) Step down the pressure and reduce the heating power to 0 within 660s~720s, and then cool down for 400s;

[0026] 8) Take out the synthetic block.

...

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Abstract

The invention discloses a coarse particle polycrystalline diamond synthesizing technology. Coarse particle polycrystalline diamond is generated by controlling the variation of heating power and pressure intensity. The coarse particle polycrystalline diamond synthesizing technology provided by the invention has the beneficial effects that the synthesized polycrystalline diamond is irregular in shape, is rough in surface, has large particles and little impurities, is dark green, and has extremely good self-sharpening capability and good thermal stability.

Description

technical field [0001] The invention relates to the field of artificial diamond production, in particular to a coarse-grain polycrystalline diamond synthesis process. Background technique [0002] Diamond is a superhard material with high hardness. It is mainly used to make various diamond tools, such as grinding tools, wire drawing dies, cutting tools and drilling tools. The diamonds produced in the world are mainly single crystals, which have been widely used. Man-made and natural diamonds are mostly single crystals, and the crystal itself is a complete large grain. Single crystal is a single particle with a complete crystal shape, and the lattice inside the particle is arranged periodically and has anisotropy; polycrystal is a particle with multiple crystal grains, and the lattice of each crystal grain is arranged periodically , is isotropic. Polycrystalline is a collection of single crystals with many oriented grains, and crystals are composed of many small grains. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J3/06
Inventor 李建林李淑云王明赵春红李立司蕊
Owner HENAN FAMOUS DIAMOND IND CO LTD
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