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Carbon-ceramic composite material with self-lubricating and anti-oxidation functions and preparation method of composite material

A carbon-ceramic composite material and composite material technology, applied in the field of carbon-ceramic composite materials and their preparation, can solve the problem of unfavorable friction and wear properties of C/C-SiC composite materials, which are not suitable for the preparation of carbon-ceramic friction materials, and affect the high temperature resistance of composite materials Performance and other issues, to achieve good self-lubricating properties, excellent high-temperature lubrication properties, and low cost effects

Active Publication Date: 2018-07-10
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, although the chemical vapor infiltration method and the precursor impregnation cracking method can prepare parts with excellent performance and net near-shaping, the preparation cycle is long and the cost is high, so it is not suitable for the preparation of carbon-ceramic friction materials.
Liquid silicon impregnation method is a high-efficiency and low-cost preparation method for C / C-SiC composites, but the composites prepared by it contain a certain amount of residual silicon, which not only affects the high temperature resistance of the composites, but also affects the C / C - The friction and wear properties of SiC composites are unfavorable

Method used

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  • Carbon-ceramic composite material with self-lubricating and anti-oxidation functions and preparation method of composite material
  • Carbon-ceramic composite material with self-lubricating and anti-oxidation functions and preparation method of composite material

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Embodiment 1

[0034]Using continuous carbon fiber as raw material, carbon fiber preform was prepared by lamination and piercing process without weft cloth, and the fiber volume fraction of carbon fiber preform was 37%. 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. 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 90 nm. The chemical vapor infiltration process is used to continue to deposit the matrix pyrolytic carbon for the subsequent reaction inside the porous carbon fiber prefabrication, and the porous carbon fiber prefabrication body is densified to obtain a porous C / C composite material prefabrication body. The density of the porous C / C composite material prefabrication body is controlled at 1.12g / cm 3 , the porosity is 38%. The porous C / C ...

Embodiment 2

[0038] 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 9.0×10 -2 Heat to 1700°C under Pa and heat treatment for 1h. 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 200 nm. The chemical vapor infiltration process is used to continue to deposit the matrix pyrolytic carbon for the subsequent reaction inside the porous carbon fiber prefabrication, and the porous carbon fiber prefabrication body is densified to obtain a porous C / C composite material prefabrication body. The density of the porous C / C composite material prefabrication body is controlled at 1.31g / cm 3 , the porosity is 38%. The porous...

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Abstract

The invention relates to a carbon-ceramic composite material with self-lubricating and anti-oxidation functions and a preparation method of the composite material. The carbon-ceramic composite material is C / C-TiC-Ti3SiC2; and the preparation method of the composite material comprises the following steps: (1) preparing a carbon fiber pre-prepared body and performing pretreatment; (2) preparing a protective coating layer on the surface of carbon fibers of the carbon fiber pre-prepared body; (3) performing densification on the carbon fiber pre-prepared body with the protective coating layer to obtain a porous C / C pre-prepared body; (4) performing high-temperature heat treatment on the porous C / C pre-prepared body; and (5) performing high-temperature heat treatment on a Ti / Si alloy or mixed powder of Ti and Si and the porous C / C pre-prepared body to prepare the C / C-TiC-Ti3SiC2 carbon-ceramic composite material. The preparation method provided by the invention has simple operation, low costs and a short process period, and the prepared C / C-TiC-Ti3SiC2 carbon-ceramic composite material has self-lubricating and anti-oxidation functions, and is wear-resistant, environmentally friendly andpollution-free.

Description

technical field [0001] The invention relates to a carbon-ceramic composite material with self-lubricating and anti-oxidation functions and a preparation method thereof, specifically a carbon fiber reinforced carbon, titanium carbide and Ti 3 SiC 2 Matrix carbon-ceramic composite material and its preparation method and application. Background technique [0002] Carbon-ceramic composite material integrates the excellent properties of carbon fiber and ceramic materials, and has the advantages of low density, high strength, wear resistance, excellent oxidation resistance, and good thermal shock resistance. It is an ideal high-performance friction braking material. , has broad application prospects in the braking systems of industries such as aviation, aerospace, high-speed rail and automobiles. Carbon fiber reinforced carbon composites (C / C) and carbon fiber reinforced carbon and silicon carbide double-matrix carbon-ceramic composites (C / C-SiC) are typical representatives of c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/83C04B35/56C04B35/52C04B35/80C04B35/65F16D69/02
CPCC04B35/806C04B35/52C04B35/56C04B35/65C04B35/83F16D69/023F16D2200/0047F16D2200/0082
Inventor 仝永刚白书欣胡永乐梁秀兵叶益聪朱利安谢炜许凤凰谢新琪祝文涛
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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