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Nanostructure-containing polycrystalline diamond, polycrystalline diamond composite sheet and preparation method thereof

A polycrystalline diamond and nanostructure technology, applied in nanotechnology, metal processing equipment, transportation and packaging, etc., can solve the problems of lack of strong bonding, overcome the difficulties in the preparation process, improve the comprehensive mechanical properties of hardness and toughness, The effect of overcoming cleavage brittle fracture

Inactive Publication Date: 2019-09-13
姜文辉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In nano-diamond aggregates, although nano-scale diamond particles are contained, there is a lack of strong bonding between the particles, and it is relatively easy to de-agglomerate to obtain single-crystal nano-diamond particles

Method used

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  • Nanostructure-containing polycrystalline diamond, polycrystalline diamond composite sheet and preparation method thereof
  • Nanostructure-containing polycrystalline diamond, polycrystalline diamond composite sheet and preparation method thereof
  • Nanostructure-containing polycrystalline diamond, polycrystalline diamond composite sheet and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Embodiment 1: prepare the polycrystalline diamond containing nanostructure

[0052] Commercially available Kabuna polytype nanostructured polycrystalline diamond particles and micron-sized single crystal diamond particles are used as raw materials for the synthesis of polycrystalline diamond. The polycrystalline diamond particles of Kabuna multi-type nanostructure are synthesized by the explosive shock wave method, they contain 99.0%-99.5% (weight percentage) of diamond, and their nominal size is 10 microns, and they are in block shape. Micron-scale single crystal diamond particles are synthesized by static high temperature and high pressure method, they contain 99.5% (weight percent) of diamond, their nominal size is 10 microns, and they are block-shaped. The two diamond particles were mixed in a mass ratio of 1:1. These diamond particles are treated with high temperature alkali and acid solution to further remove impurities. High-temperature alkali solution treatmen...

Embodiment 2

[0053] Example 2: Preparation of polycrystalline diamond composite sheets containing nanostructures

[0054] Commercially available Kabuna polytype nanostructured polycrystalline diamond particles and micron-sized single crystal diamond particles are used as raw materials for the synthesis of polycrystalline diamond. The polycrystalline diamond particles of Kabuna multi-type nanostructure are synthesized by the explosive shock wave method, they contain 99.0%-99.5% (weight percentage) of diamond, and their nominal size is 10 microns, and they are in block shape. Micron-scale single crystal diamond particles are synthesized by static high temperature and high pressure method, they contain 99.5% (weight percent) of diamond, their nominal size is 10 microns, and they are block-shaped. These diamond particles are treated with high temperature alkali and acid solution to further remove impurities. High-temperature alkali solution treatment is to mix diamond particles and sodium hyd...

Embodiment 3

[0056] Example 3: Preparation of thermally stable polycrystalline diamond containing nanostructures and thermally stable polycrystalline diamond composite sheets containing nanostructures

[0057] In this example, the samples used in the test are the polycrystalline diamond containing nanostructure in Example 1 and the polycrystalline diamond composite sheet containing nanostructure in Example 2. Remove metal binder-cobalt with mixed acid, the volume composition of mixed acid is: 25% nitric acid (concentration is 95wt.%) and 75% hydrochloric acid (concentration is 36wt.%), and the depth of cobalt removal is about 0.2 mm, prepared respectively Thermally stable polycrystalline diamond containing nanostructures and thermally stable polycrystalline diamond composite sheets containing nanostructures are produced.

[0058] In the present invention, the preparation method of polycrystalline diamond containing nanostructure and polycrystalline diamond composite sheet is similar to the...

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Abstract

The invention relates to a nanostructure-containing polycrystalline diamond for cutting tools, grinding tools, drill tools and wear parts, a polycrystalline diamond composite sheet and a preparationmethod thereof. The polycrystalline diamond layer in the polycrystalline diamond or the polycrystalline diamond composite sheet is composed of continuous and bonded diamond components and a catalyticmaterial located in the gaps thereof, wherein the diamond component comprises a nanostructured polycrystal (polycrystalline) diamond particles, which are micron-sized and Carbonado-type nanostructuredpolycrystalline diamond particle raw materials prepared by an explosion method. The catalytic material located in the gaps may be partially or completely removed to enhance the thermal stability of the polycrystalline diamond or polycrystalline diamond composite sheet. The preparation method comprises sintering the diamond particles under the conditions of high temperature and high pressure withthe help of the catalytic material, wherein the diamond particles comprise the Carbonado-type nanostructured polycrystalline diamond particles.

Description

technical field [0001] The invention relates to a polycrystalline diamond containing nanostructures, a polycrystalline diamond composite sheet and a preparation method thereof for cutting tools, abrasive tools, drilling tools and wear-resistant parts. They are used in road and bridge construction, mechanical processing, Stone processing, mining, oil drilling and mining and other fields. Background technique [0002] Polycrystalline diamond (Polycrystalline Diamond, referred to as PCD) has been well known. It is a diamond sintered body composed of a large number of diamond particles with diamond-to-diamond bonding (that is, Diamond-to-Diamond, referred to as D-D bonding). The preparation of polycrystalline diamond is usually by sintering and bonding fine diamond particles together under high temperature and high pressure with the assistance of catalyst materials. The catalyst materials promote the formation of D-D bonds between diamond particles. The catalyst materials are co...

Claims

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Application Information

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IPC IPC(8): B22F3/14B22F1/00B22F7/08C22C26/00B82Y40/00
CPCB22F3/14B22F7/08C22C26/00B82Y40/00B22F1/054
Inventor 姜文辉
Owner 姜文辉
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