A kind of preparation method of c/c-tic carbon-ceramic composite material

A carbon-ceramic composite material and carbon fiber prefabricated body technology, which is applied in the direction of ceramic products, mechanical equipment, friction linings, etc., can solve the problem of affecting the performance of carbon-ceramic composite materials, improper control of the reaction process, metals, and fast reaction between melt and carbon. problems, to achieve the effects of low cost, short process cycle, and improved fracture toughness

Active Publication Date: 2021-05-14
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this process, the titanium carbide ceramic matrix is ​​formed by infiltrating the porous carbon preform with the titanium metal melt and reacting with solid carbon. The reaction speed between the melt and carbon is fast and it is difficult to effectively control it; Reaction occurs, resulting in damage to the strength of carbon fiber; improper control of the reaction process can easily lead to a small amount of residual metal remaining in the carbon-ceramic composite material, which affects the performance of the carbon-ceramic composite material

Method used

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  • A kind of preparation method of c/c-tic carbon-ceramic composite material
  • A kind of preparation method of c/c-tic carbon-ceramic composite material

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Embodiment 1

[0034] Using continuous carbon fiber as raw material, the carbon fiber preform was prepared by the non-weft cloth laminated puncture process, and the fiber volume fraction of the carbon fiber preform was 35%. Put the carbon fiber prefabricated body in a vacuum of 8.0×10 -2 Heat to 1500°C under Pa and heat treatment for 1h to remove the adhesive on the surface of the fiber. A pyrolytic carbon protective coating is prepared on the carbon fiber surface of the heat-treated carbon fiber preform by using a chemical vapor deposition process, and the thickness of the pyrolytic carbon protective layer is 60 nm. The chemical vapor infiltration process is used to continue to deposit the matrix pyrolytic carbon inside the porous carbon fiber preform for subsequent reactions, and the porous carbon fiber preform is densified to obtain a porous C / C composite material preform, and the density control of the porous C / C composite material preform At 1.36g / cm 3 , the porosity is 32%. The poro...

Embodiment 2

[0038] Using continuous carbon fiber as raw material, the carbon fiber preform was prepared by using the lamination and piercing process without weft cloth, and the fiber volume fraction of the carbon fiber preform was 30%. Put the carbon fiber prefabricated body in a vacuum of 6.0×10 -2 Heat to 1600°C under Pa and heat treatment for 2 hours to remove the adhesive on the surface of the fiber. A pyrolytic carbon protective coating is prepared on the carbon fiber surface of the heat-treated carbon fiber preform by using a chemical vapor deposition process, and the thickness of the pyrolytic carbon protective layer is 100 nm. Using phenolic resin as the precursor, the matrix pyrolysis carbon for the subsequent reaction is prepared inside the porous carbon fiber prefabrication process by using the precursor impregnation and cracking process, and the porous carbon fiber prefabrication body is densified to obtain a porous C / C composite material prefabrication body, porous C / C compos...

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Abstract

The present invention relates to a kind of preparation method of C / C-TiC carbon-ceramic composite material, comprising the following steps: (1) preparation and pretreatment of carbon fiber prefabricated body; (2) preparing protective coating on carbon fiber surface of carbon fiber prefabricated body; (3) Densifying the carbon fiber preform with a protective coating to make a porous C / C preform; (4) heat-treating the porous C / C preform at high temperature; (5) volatilizing titanium vapor into the porous C / C preform above it In this process, C / C-TiC carbon-ceramic composites were prepared. The preparation method of the present invention is simple in operation, low in cost and short in process cycle, realizes the near-net shape of the C / C-TiC carbon-ceramic composite material, and the prepared C / C-TiC carbon-ceramic composite material has high bonding strength, low density and wear resistance damage.

Description

technical field [0001] The invention relates to a preparation method of a carbon-ceramic composite material, in particular to a C / C-TiC composite material and its preparation method and application. Background technique [0002] Titanium carbide ceramics have high melting point, low density, higher hardness than SiC, ZrC and other ceramics, excellent wear resistance, and have broad application prospects in wear-resistant materials, cutting tools, mechanical wear-resistant parts and other fields. However, similar to almost all ceramic materials, titanium carbide ceramics have high brittleness, low fracture toughness, and are prone to catastrophic failure, which greatly limits its further application. Carbon fiber has very excellent mechanical properties, and it can be used as a toughening material to effectively improve the fracture toughness of ceramic materials and overcome the brittleness of ceramic materials. Carbon fiber is used to toughen titanium carbide ceramics to p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/06C04B35/84F16D69/02
CPCC04B35/83C04B38/067C04B2235/3843C04B2235/77C04B2235/96F16D69/023F16D2200/0047F16D2200/0082F16D2250/0046C04B38/0074C04B38/0067
Inventor 仝永刚白书欣梁秀兵胡永乐张虹毛聪张明军祝文涛谢新琪柳建
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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