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Growth type polycrystalline diamond sintered assembly and application thereof

A polycrystalline diamond and diamond powder technology, which is applied in the field of superhard materials, can solve the problems that the diamond layer cannot be sintered, and achieve the effects of uniform residual stress distribution, optimized sintering environment, and good synthesis repeatability

Inactive Publication Date: 2014-09-03
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] However, some domestic scientific research institutions have studied this kind of assembly, and the conclusion is that diamond powder can only be sintered locally, and the diamond layer far away from the metal layer cannot be sintered.

Method used

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  • Growth type polycrystalline diamond sintered assembly and application thereof
  • Growth type polycrystalline diamond sintered assembly and application thereof
  • Growth type polycrystalline diamond sintered assembly and application thereof

Examples

Experimental program
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Embodiment Construction

[0032] Such as image 3 As shown, in this embodiment, the sintering assembly used includes a heating tube 31 , a metal adhesive layer 32 , a diamond layer 33 , an insulating tube 34 , and an infiltration cavity 35 .

[0033] In an implementation manner of this embodiment, the heating tube 31 is cylindrical, and the cylindrical heating tube 31 is located at the outermost layer of the sintered assembly. The height of the heating pipe is preferably selected at 1.2-10 cm. The outer diameter and height of the heating tube depend on the high-pressure space provided by the high-pressure equipment, and the heating tube can be enlarged correspondingly if the space is large. The wall thickness of the heating tube 31 is selected to be between 0.15-1 cm. The upper and lower ends of the heating pipe can be covered with several conductive heating sheets respectively, and the diameter of the sheets is equal to the outer diameter of the heating pipe.

[0034] The insulating tube 34 is loca...

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Abstract

The invention provides a growth type polycrystalline diamond sintered assembly and an application thereof. The polycrystalline diamond sintered assembly comprises a heating pipe, an insulating pipe, a melt infiltration cavity, a metal binding agent and diamond powder, wherein the heating pipe is positioned on the outermost layer of the sintered assembly; the insulating pipe is positioned in the heating pipe and is clung to the heating pipe; a first hollow cavity is formed in the insulating pipe; the melt infiltration cavity is formed in the first hollow cavity, and a second hollow cavity is formed in the melt infiltration cavity; the second hollow cavity is filled with the metal binding agent and the diamond powder.

Description

technical field [0001] The invention relates to the technical field of superhard materials, in particular to a sintered component for synthesizing polycrystalline diamond by static high pressure method and its application. Background technique [0002] Due to the good thermal conductivity, high hardness and good wear resistance of the polycrystalline diamond layer, it is widely used in oil drilling, geological drilling and coal mining applications, and in the field of high-performance electronic packaging functional materials. [0003] There are two main ways to prepare polycrystalline diamond. One is vapor deposition method. The advantage of this method is that the thickness of the polycrystalline wafer can be precisely controlled, and large-diameter samples can be produced. The disadvantage is that it takes a long time, the thickness is thin, and the production capacity is low; Another production method of polycrystalline diamond is to add a certain binder to diamond powde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J3/06
Inventor 胡强贾晓鹏马红安
Owner JILIN UNIV
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