Method for preparing carbon/carbon-silicon carbide composite material for bearings

A composite material and silicon carbide technology, which is applied in the preparation of carbon/carbon-silicon carbide (C/C-SiC) composite materials for bearings, and in the field of high-performance composite material process preparation, can solve the problem of slow wear, high life, and inapplicability and other problems, to achieve the effect of improving wear resistance, reducing residual stress and reducing cost

Inactive Publication Date: 2014-07-16
SHANGHAI UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the solid self-lubricating bearing adopts the combination of metal base material and solid lubricant, which can realize oil-free self-lubrication under the harsh special conditions of high temperat

Method used

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  • Method for preparing carbon/carbon-silicon carbide composite material for bearings

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Embodiment 1

[0015] Put the non-woven carbon fiber integral mat made by alternately laminating the non-weft cloth and the net tire through needle punching into a heat treatment furnace, vacuumize, and carry out carbonization treatment at a temperature of 900-1000°C to obtain a density of 0.60g / cm 3 The non-weft cloth carbon fiber integral felt is put into the CVI furnace, with C 3 h 6 As a precursor, it is densified by CVI at a temperature of 900-1100°C, and the density is 1.30g / cm 3 The C / C porous preform is subjected to a high temperature treatment at 2350-2600°C under an Ar gas protective atmosphere. Resin impregnation, pressurization, after impregnation, put it in an oven for curing treatment, after curing, put it in a high-temperature furnace to vacuumize and carbonize at a temperature of 900-1000 ° C, after carbonization, put the material in a high-temperature furnace, under the protective atmosphere of Ar gas, The temperature is about 2250°C for high temperature heat treatment, an...

Embodiment 2

[0017] Put the carbon fiber integral felt made of polyacrylonitrile pre-oxidized fiber through needle punching into a heat treatment furnace, vacuumize, and carry out carbonization treatment at a temperature of 900-1000°C to obtain a density of 0.30g / cm 3 Carbon fiber integral felt, put the carbon fiber integral felt into the CVI furnace, and use C 3 h 6 As a precursor, it is densified by CVI at a temperature of 900-1100°C, and the density is 1.30g / cm 3 The C / C porous preform is subjected to a high temperature treatment at 2350-2600°C under an Ar gas protective atmosphere. Resin impregnation, pressurization, after impregnation, put it in an oven for curing treatment, after curing, put it in a high-temperature furnace to vacuumize and carbonize at a temperature of 900-1000 ° C, after carbonization, put the material in a high-temperature furnace, under the protective atmosphere of Ar gas, The temperature is about 2250°C for high temperature heat treatment, and the density is 1...

Embodiment 3

[0019] Put the carbon fiber integral felt made of polyacrylonitrile pre-oxidized fiber through needle punching into a heat treatment furnace, vacuumize, and carry out carbonization treatment at a temperature of 900-1000°C to obtain a density of 0.30g / cm 3 Carbon fiber integral felt, put the carbon fiber integral felt into the CVI furnace, and use C 3 h 6 As a precursor, it is densified by CVI at a temperature of 900-1100°C, and the density is 1.30g / cm 3The C / C porous preform is subjected to a high temperature treatment at 2350-2600°C under an Ar gas protective atmosphere. Resin impregnation, pressurization, after impregnation, put it in an oven for curing treatment, after curing, put it in a high-temperature furnace to vacuumize and carbonize at a temperature of 900-1000 ° C, after carbonization, put the material in a high-temperature furnace, under the protective atmosphere of Ar gas, The temperature is about 2250°C for high temperature heat treatment, and the density is 1....

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Abstract

The invention discloses a method for preparing a carbon/carbon-silicon carbide composite material for bearings. The preparation method comprises the following steps: preparing a carbon fiber integral felt of 0.15-0.30g/cm<3> from polyacrylonitrile preoxidized fibers through puncture carbonization, or preparing a non-woven cloth carbon fiber integral felt of 0.4-0.6g/cm<3> from non-woven cloth and a mesh tyre through puncture carbonization in an alternating lamination manner; preparing C/C porous preform with density of 1.35-1.75g/cm<3> by adopting a chemical vapor infiltration (CVI) and resin precursor infiltration and pyrolysis (PIP) comprehensive process, and performing a high-temperature treatment at 2,250-2,600 DEG C in the Ar gas protective atmosphere; and vacuumizing, then introducing Ar gas, heating to 2,200-2,350 DEG C to perform liquid silicon infiltration, and preserving heat for 1.5 hours. The method is a preparation method of the carbon/carbon-silicon carbide (C/C-SiC) composite material with little residual silicon and low abrasion rate for bearings.

Description

technical field [0001] The invention relates to a method for preparing a carbon / carbon-silicon carbide (C / C-SiC) composite material for bearings, in particular to a C / C-SiC composite material with light weight, low cost, high strength and low wear rate Preparation. It belongs to the preparation technology of high-performance composite materials. Background technique [0002] C / C-SiC composite materials have the advantages of high temperature resistance, low density, good wear resistance, good corrosion resistance, and excellent friction and wear properties, so they have been used as brake discs in aerospace and high-end automobile fields. It also has self-lubricating properties and can be used as a bearing material. At present, the solid self-lubricating bearing adopts the combination of metal base material and solid lubricant, which can realize oil-free self-lubrication under the harsh special conditions of high temperature, low speed, heavy load, difficult formation of l...

Claims

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Application Information

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IPC IPC(8): C04B35/80C04B35/83C04B35/565C04B35/622
Inventor 白瑞成李波李爱军周春节孙晋良
Owner SHANGHAI UNIV
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