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Diamond composite material, as well as preparation method and application thereof

A composite material and diamond technology, applied in metal material coating process, gaseous chemical plating, coating and other directions, can solve the problems of weak bonding between diamond and cemented carbide, and poor durability of polycrystalline diamond composite sheets.

Active Publication Date: 2020-10-23
CR GEMS SUPERABRASIVES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a kind of diamond composite material and its preparation method and application, to solve the problem that polycrystalline diamond composite sheet is not durable in the prior art and separate The problem of weak combination of CVD diamond and cemented carbide

Method used

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  • Diamond composite material, as well as preparation method and application thereof
  • Diamond composite material, as well as preparation method and application thereof
  • Diamond composite material, as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0070] A kind of diamond composite material, comprises CVD diamond layer 1 and polycrystalline diamond composite layer 2, described polycrystalline diamond composite layer 2 comprises polycrystalline diamond layer 21 and cemented carbide layer 22, and described polycrystalline diamond layer 21 is provided with all Between the CVD diamond layer 1 and the hard alloy layer 22; from the side near the CVD diamond layer 1 to the side near the hard alloy layer 22, the metal content in the polycrystalline diamond layer 21 increases, wherein, near The metal content in the polycrystalline diamond layer 21 on one side of the CVD diamond layer 1 is 0wt%, the metal content in the polycrystalline diamond layer 21 on the side near the hard alloy layer 22 is 1wt%, and the metal content increasing rate is 0.2 wt% / mm. The optical microscope image of the CVD diamond layer in the diamond composite is shown in figure 2 , see the Raman spectrum image 3 .

[0071] The preparation method of this...

Embodiment 2

[0082] A kind of diamond composite material, comprises CVD diamond layer 1 and polycrystalline diamond composite layer 2, described polycrystalline diamond composite layer 2 comprises polycrystalline diamond layer 21 and cemented carbide layer 22, and described polycrystalline diamond layer 21 is provided with all Between the CVD diamond layer 1 and the hard alloy layer 22; from the side near the CVD diamond layer 1 to the side near the hard alloy layer 22, the metal content in the polycrystalline diamond layer 21 increases, wherein, near The metal content in the polycrystalline diamond layer 21 on one side of the CVD diamond layer 1 is 0.4wt%, and the metal content in the polycrystalline diamond layer 21 on the side near the hard alloy layer 22 is 6wt%, and the increasing rate of the metal content is 20 wt% / mm.

[0083] The preparation method of this diamond composite material comprises the steps:

[0084] 1) Polishing the polycrystalline diamond layer in the polycrystalline...

Embodiment 3

[0094] A kind of diamond composite material, comprises CVD diamond layer 1 and polycrystalline diamond composite layer 2, described polycrystalline diamond composite layer 2 comprises polycrystalline diamond layer 21 and cemented carbide layer 22, and described polycrystalline diamond layer 21 is provided with all Between the CVD diamond layer 1 and the hard alloy layer 22; from the side near the CVD diamond layer 1 to the side near the hard alloy layer 22, the metal content in the polycrystalline diamond layer 21 increases, wherein, near The metal content in the polycrystalline diamond layer 21 on one side of the CVD diamond layer 1 is 1wt%, the metal content in the polycrystalline diamond layer 21 on the side near the hard alloy layer 22 is 5wt%, and the metal content increasing rate is 2.5 wt% / mm.

[0095] The preparation method of this diamond composite material comprises the steps:

[0096] 1) Polishing the polycrystalline diamond layer in the polycrystalline diamond com...

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Abstract

The invention provides a diamond composite material, as well as a preparation method and application thereof. The diamond composite material comprises a CVD diamond layer and a polycrystalline diamondcomposite layer, wherein the polycrystalline diamond composite layer comprises a polycrystalline diamond layer and a hard alloy layer; the polycrystalline diamond layer is arranged between the CVD diamond layer and the hard alloy layer; and from one side close to the CVD diamond layer to one side close to the hard alloy layer, the metal contents in the polycrystalline diamond layer are increasedprogressively. The preparation method of the diamond composite material comprises the following steps of (1) polishing and cleaning the polycrystalline diamond layer in the polycrystalline diamond composite layer, and obtaining a pretreated polycrystalline diamond composite layer; (2) placing the pretreated polycrystalline diamond composite layer into microwave plasma chemical vapor deposition equipment, and carrying out corrosion; and (3) stopping feeding oxygen, and then feeding mixed gas to carry out chemical vapor deposition on the polycrystalline diamond layer. According to the diamond composite material, as well as the preparation method and the application thereof provided by the invention, the diamond composite material has low wear resistance ratio and long service time, and the occurrence probability of layer-to-layer stripping is low.

Description

technical field [0001] The invention relates to the technical field of superhard materials, in particular to a diamond composite material and its preparation method and application. Background technique [0002] Polycrystalline diamond compact (PDC) is a new type of functional material, which is made of diamond micropowder and cemented carbide substrate and sintered under ultra-high pressure and high temperature conditions. It has the high hardness, high wear resistance and thermal conductivity of diamond. It has the strength and impact toughness of cemented carbide, and is an ideal material for making cutting tools, drilling bits and other wear-resistant tools. However, the polycrystalline diamond layer in the polycrystalline diamond composite sheet is easily peeled off from the cemented carbide layer, resulting in shedding and damage, which affects the service life of the polycrystalline diamond composite sheet. CVD diamond has better performance than PDC in terms of hard...

Claims

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Application Information

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IPC IPC(8): C23C16/27B22F7/04C23C16/02
CPCC23C16/274B22F7/04C23C16/0236B22F2007/042
Inventor 王垒温简杰
Owner CR GEMS SUPERABRASIVES
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