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Single crystal diamond particles containing cubic boron nitride particles, and method for producing same

A cubic boron nitride, diamond particle technology, applied in chemical instruments and methods, methods of chemically changing substances by atmospheric pressure, chemical/physical processes, etc., can solve problems such as difficulty in calcination

Active Publication Date: 2019-03-08
大岛龙司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

), it is difficult to calcine at high temperature in the atmosphere

Method used

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  • Single crystal diamond particles containing cubic boron nitride particles, and method for producing same
  • Single crystal diamond particles containing cubic boron nitride particles, and method for producing same
  • Single crystal diamond particles containing cubic boron nitride particles, and method for producing same

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Experimental program
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Embodiment

[0068] 1. Preparation of diamond particles of the inventive example

[0069] First, prepare fine graphite powder, cBN powder and Fe-based alloy catalyst metal powder (Ni: 28% by weight, Co: 5% by weight, Mn: 3% by weight, and the balance is Fe and unavoidable impurities) mixed powder (cBN particles: Fe-based alloy catalyst metal powder = 97:3) and the fine graphite powder and mixed powder are powders below 400 mesh. The mixing ratio of graphite powder and mixed powder is (graphite powder):(mixed powder of cBN particles and Fe-based alloy catalyst powder)=11:9.

[0070] This was charged into a powder mixer as a starting material, and mixed for 120 minutes under a reduced pressure of 280 MPa to obtain a fine mixed powder of 100 mesh or less.

[0071] Then, put the mixed powder into the press mold, and perform press molding under the conditions of 230MPa, 25°C, and 5 seconds to produce cylindrical raw materials. Insert the obtained cylindrical raw material to 75mm 3 A pressu...

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Abstract

Provided are monocrystalline diamond particles having excellent thermal stability. The monocrystalline diamond particles contain cubic crystalline boron nitride particles. Preferably, the cubic crystalline boron nitride particles are present inside and / or on the surface of the monocrystalline diamond particles containing the cubic crystalline boron nitride particles, the average particle size of the monocrystalline diamond particles is 500 μm or less, and the average particle size of the cubic crystalline boron nitride particles is 0.05 to 100 μm.

Description

technical field [0001] The present invention relates to a single-crystal diamond particle containing cubic boron nitride particles excellent in thermal stability, and a method for producing the same. Background technique [0002] Diamond has the highest hardness materially, and is widely used as an abrasive material for grinding various materials such as cemented carbide, as an abrasive material used for cutting integrated circuits, and the like. Abrasives and abrasives using diamond require a large removal amount of cutting material per unit time and a small surface roughness of a processed surface. Generally, polycrystalline diamond abrasive grains are used in order to improve grinding accuracy. However, since polycrystalline diamond abrasive grains are produced by dynamic pressurization using a large amount of explosives and sintering diamond grains as a starting material, the production process is restricted and expensive. [0003] Therefore, abrasive grains using sing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J3/06
CPCB01J3/06B01J3/065B01J2203/061B01J2203/0655B01J2203/066
Inventor 大岛龙司崔祥仁
Owner 大岛龙司