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Diamond-containing composite material and preparation method thereof

A composite material and diamond technology, which is applied in the field of composite materials containing diamond and its preparation, can solve the problems of limited application range, small material size, complicated equipment, etc., and achieves simple and easy preparation process, low sintering temperature, and thermal conductivity. high effect

Inactive Publication Date: 2013-05-01
CHANGSHA MAYROLL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Among these materials, natural single crystal diamond resources are scarce, and the knives made of it are expensive; while making knives from artificial polycrystalline diamond requires the use of metal binders such as cobalt at high temperature (1800°C) and high pressure (5-6Gpa ) to polycrystallize diamond single crystal powder into polycrystalline material. High-pressure chamber is required in the production process. This kind of equipment is complicated, and the size of the prepared material is small, often <φ80mm, which increases the production cost and limits the production cost. The production size of the tool
In addition, CVD diamond is a film-like diamond composed of a polycrystalline layer with a thickness of about 10-30 μm deposited on a cemented carbide substrate. Due to the small adhesion between the diamond film and the substrate material, its application range is limited.

Method used

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  • Diamond-containing composite material and preparation method thereof
  • Diamond-containing composite material and preparation method thereof

Examples

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preparation example Construction

[0022] In a typical implementation of the present invention, a method for preparing a diamond-containing composite material is provided. The preparation method includes the following steps: adding diamond powder and carbon powder to a liquid organic material with a certain viscosity and mixing uniformly to form a mixed material. Slurry A is solidified and ground into powder B with uniform particles; powder B is hot-molded to obtain a green body; in a gas-phase silicon environment (or in an environment with silicon powder preset), high-temperature sintering The green body, the silicon element penetrates into the green body and reacts with the carbon element in the green body to form silicon carbide, and a composite material containing diamond is obtained. The viscosity of the above-mentioned organic materials does not have too many requirements, as long as the diamond powder and carbon powder can be bonded on the organic materials.

[0023] The preparation method of the diamond...

specific Embodiment 1-3

[0031] The beneficial effects of the diamond-containing composite material of the present invention will be further illustrated below in conjunction with specific examples 1-3 and the test structures of samples 1-3 prepared from examples 1-3.

Embodiment 1

[0033] Raw materials: 80Kg of diamond powder, 10Kg of graphite powder and 10Kg of liquid phenolic resin (Xi'an Taihang Fire-retardant Polymer Research Institute, RFB grade).

[0034] Production method: put diamond powder and graphite powder into liquid phenolic resin and ball mill for 20 hours to obtain mixed slurry A, which is solidified and ground into uniform mixed powder B, so that mixed powder B contains 80wt% diamond and 10wt% Graphite, 10wt% phenolic resin. ; The mixed powder B was hot-molded under the conditions of molding temperature 150°C and molding pressure 10MPa to obtain a biscuit; the biscuit was placed in a high-temperature vacuum furnace with gas-phase silicon, and the sintering temperature was controlled to be 1600°C. 200Pa, the silicon element penetrates into the green body and reacts with the carbon element in the green body to form silicon carbide, and heats it for 6 hours to obtain the diamond-containing composite material sample 1 of the present inventio...

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Abstract

The invention discloses a diamond-containing composite material and a preparation method thereof, wherein the preparation method of the diamond-containing composite material comprises the following steps of: adding diamond powder and carbon powder to a liquid organic material with certain viscosity, and uniformly mixing to form a mixed slurry A; solidifying, and then grinding into powder B; carrying out hot pressure molding formation on the powder B to prepare a biscuit; and sintering the biscuit at high temperature in a gas-phase silicon environment so that silicon is permeated into the biscuit and reacts with carbon contained in the biscuit to generate silicon carbide so as to prepare the diamond-containing composite material. The preparation method of the diamond-containing composite material has lower sintering temperature (less than 1600 DEG C), and simple and easy preparation process; and in addition, the diamond-containing composite material prepared by the method has high rigidity, good abrasive resistance and high heat conductivity and modulus.

Description

technical field [0001] The invention relates to a diamond-containing composite material and a preparation method thereof. Background technique [0002] Diamond is the hardest substance known so far, and its microhardness can reach 10,000HV. At the same time, because diamond also has high thermal conductivity and wear resistance, diamond materials have great advantages in being used as superhard tools. In the process of making superhard tools, the diamond raw materials used include natural and artificial, including single crystal diamond (natural and artificial), artificial polycrystalline diamond (PCD) and CVD diamond. [0003] Among these materials, natural single crystal diamond resources are scarce, and the knives made of it are expensive; while making knives from artificial polycrystalline diamond requires the use of metal binders such as cobalt at high temperature (1800°C) and high pressure (5-6Gpa ) to polycrystallize diamond single crystal powder into polycrystalline...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/52C04B35/565C04B35/622
Inventor 胡勇钱兴生
Owner CHANGSHA MAYROLL TECH