PDC with high thermal conductivity and preparation method thereof

A technology of diamond composite sheet and high thermal conductivity, which is applied in the field of superhard material manufacturing, can solve the problem that diamond composite sheet cannot have both high wear resistance and thermal conductivity, etc., so as to improve heat resistance, heat resistance and thermal conductivity. performance effect

Active Publication Date: 2014-03-12
SHENZHEN HAIMINGRUN SUPERHARD MATERIALS
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Problems solved by technology

[0008] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a diamond composite sheet with high thermal cond

Method used

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  • PDC with high thermal conductivity and preparation method thereof
  • PDC with high thermal conductivity and preparation method thereof
  • PDC with high thermal conductivity and preparation method thereof

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Embodiment Construction

[0027] The present invention provides a diamond composite sheet with high thermal conductivity and a preparation method thereof. In order to make the purpose, technical solution and effect of the present invention clearer and clearer, the present invention will be further described in detail below. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0028] like figure 1 A method for preparing a diamond compact with high thermal conductivity, wherein the method comprises the following steps:

[0029] S100. Plating a diamond layer on the surface of the polycrystalline diamond powder, or filling the internal pores of the polycrystalline diamond powder with a high thermal conductivity metal to form polycrystalline diamond aggregates. Wherein, the high thermal conductivity metal is copper, aluminum, silver or an alloy formed of copper, aluminum, silver with high thermal conductiv...

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Abstract

The invention discloses a PDC with high thermal conductivity and a preparation method thereof. The preparation method comprises the following steps: A. plating polycrystalline diamond powder with a diamond layer, or filling the inner holes of the polycrystalline diamond powder with metal with high thermal conductivity to form polycrystalline diamond granules; B. mixedly putting the polycrystalline diamond granules and polycrystalline diamond powder into a metal cup, then putting a hard alloy base body, and performing vacuum processing; C. putting pyrophyllite, then sintering to obtain the PDC. The PDC disclosed by the invention adopts the high-abrasion-resistance polycrystalline diamond with D-D bonds, and the high-abrasion-resistance polycrystalline diamond can protect the polycrystalline granules from being permeated by binding agents such as cobalt, nickel and iron when the polycrystalline granules are sintered at high temperature and under high pressure; the content of the metal binding agent on the PCD layer can be controlled directly in the synthesis process without the step of removing PDC accelerant metal after synthesis. With adoption of the preparation method, the high abrasion resistance of the polycrystalline powder after the high-temperature high-pressure sintering is reserved, and the thermal conductivity of the polycrystalline powder is improved.

Description

technical field [0001] The invention relates to the field of superhard material manufacturing, in particular to a diamond composite sheet with high thermal conductivity and a preparation method thereof. Background technique [0002] Diamond-tungsten carbide compact, referred to as diamond compact or PDC, is mainly used for drilling teeth of diamond compact drills (referred to as PDC drills). The diamond composite sheet is made by sintering the diamond powder with a certain binder and the cemented carbide matrix on a special diamond hydraulic press under ultra-high pressure and high temperature conditions. It consists of a polycrystalline diamond layer and a cemented carbide substrate. Due to the high hardness and good wear resistance of the polycrystalline diamond layer, coupled with the good toughness and weldability of the cemented carbide substrate, it is widely used in oil drilling, geological drilling and coal mining applications. [0003] In the process of making PDC...

Claims

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Application Information

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IPC IPC(8): B01J3/06
Inventor 陈惠孔利军李尚劼
Owner SHENZHEN HAIMINGRUN SUPERHARD MATERIALS
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