Method for preparing copper silicon alloy modified carbon/ceramic friction material

A copper-silicon alloy and friction material technology, applied in chemical instruments and methods, other chemical processes, etc., can solve problems such as increasing the angle between fibers and friction surfaces, decreasing material strength and fracture toughness, and increasing material manufacturing costs. Easy to process effect

Active Publication Date: 2010-09-01
HUNAN SHIXIN NEW MATERIALS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among the above measures, increasing the thermal conductivity of the material by using fibers with high thermal conductivity will lead to a substantial increase in the cost of material manufacturing
Increasing the angle between the fiber and the friction surface can be achieved through the design of the fiber preform, but the room for improvement is limited
Increasing the matrix content in the material will lead to a decrease in the fiber volume content, resulting in a decrease in the strength and fracture toughness of the material

Method used

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  • Method for preparing copper silicon alloy modified carbon/ceramic friction material
  • Method for preparing copper silicon alloy modified carbon/ceramic friction material
  • Method for preparing copper silicon alloy modified carbon/ceramic friction material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) The density is 0.56g / cm 3 The carbon fiber integral felt is a prefabricated body;

[0033]Under the protective atmosphere of argon, the preform is subjected to high-temperature heat treatment at 2300 ° C, and the holding time is 3 hours;

[0034] (2) Adopting propylene as carbon source gas, hydrogen as dilution gas, the volume ratio of propylene and hydrogen is 1: 2, adopting isothermal chemical vapor infiltration method to the preform processed through step (1) at 1100 ℃ of deposition heat Decomposition of charcoal, after 100 hours of deposition, the density is 1.24g / cm 3 Low-density C / C porous body material;

[0035] (3) After mixing Cu powder with a purity ≥ 99% and an average particle size of 0.01 to 0.1 mm and Si powder with a purity ≥ 99% and an average particle size of 0.05 to 0.075 mm according to a mass ratio of 2:3, take C / C The mixed powder of Si powder and Cu powder, which is 3 times the mass of the porous body, is evenly mixed and placed in a graphit...

Embodiment 2

[0039] (1) The density is 0.36g / cm 3 The carbon fiber integral felt is a prefabricated body;

[0040] Under the protective atmosphere of argon, the preform is subjected to high-temperature heat treatment at 1600 °C, and the holding time is 6 hours;

[0041] (2) Adopting natural gas as carbon source gas, hydrogen as dilution gas, the volume ratio of propylene and hydrogen is 1: 3, adopting thermal gradient chemical vapor infiltration method to deposit heat to the prefabricated body processed through step (1) under 1000 ℃ After decomposing carbon and depositing for 60 hours, the density is 0.84g / cm 3 The low-density C / C porous body material is impregnated with furan resin and carbonized to obtain a density of 1.35g / cm 3 The low-density C / C porous body material, the impregnation temperature is 100°C, and the carbonization temperature is 850°C;

[0042] (3) After mixing Cu powder with a purity of ≥99% and an average particle size of 0.01 to 0.1mm and Si powder with a purity of ...

Embodiment 3

[0045] (1) The density is 0.14g / cm 3 The carbon fiber integral felt is a prefabricated body, and the prefabricated body is subjected to 1500? High temperature heat treatment, holding time: 10 hours;

[0046] (2) Impregnated with furan resin and carbonized to obtain a density of 1.20g / cm 3 The low-density C / C porous body material, the impregnation temperature is 85°C, and the carbonization temperature is 900°C;

[0047] (3) After mixing Cu powder with a purity of ≥99% and an average particle size of 0.01 to 0.1mm and Si powder with a purity of ≥99% and an average particle size of 0.05 to 0.075mm according to a mass ratio of 1:19, the C / C The mixed powder of Si powder and Cu powder which is 2 times of the mass of the porous body is uniformly mixed and placed in a graphite crucible and smoothed.

[0048] (4) Spread the low-density C / C porous body material obtained in step (2) on the graphite crucible powder obtained in step 3, and perform non-immersion melt infiltration in a h...

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Abstract

The invention discloses a method for preparing a copper silicon alloy modified carbon / ceramic friction material, which comprises the following steps of: 1, thermally treating a carbon fiber prefabricated body at high temperature; 2, performing chemical vapor infiltration and (or) resin impregnation / carbonization densification treatment on the thermally-treated carbon fiber prefabricated body to obtain a low-density carbon fiber reinforced matrix carbon (C / C) porous material; 3, preparing Cu and Si infiltration powder; and 4, placing the Cu and Si infiltration powder into a graphite crucible, spreading the C / C porous material on the powder in the graphite crucible, performing non-immersion smelting infiltration in a high-temperature vacuum furnace, and compounding the C / C porous material and the powder to form the copper silicon alloy modified carbon / ceramic friction material through the reaction of Si and C, Si and Cu. The method has the advantages of simple and easily-controlled production process and low preparation cost; the prepared material has controllable microstructure and performance and excellent heat conducting performance; and the method can realize industrialized production, and has broad application prospect in the civil and military fields of airplanes, rapid trains, automobiles and the like.

Description

Technical field: [0001] The invention discloses a preparation method of a carbon / ceramic friction material, in particular to a copper-silicon alloy modified carbon / ceramic friction material and a preparation method thereof, belonging to the technical field of new materials. Background technique [0002] Carbon fiber-reinforced carbon-based and ceramic-based (abbreviated as carbon / ceramic, specifically C / C-SiC in this invention) friction materials are developed in the mid-1990s following powder metallurgy and carbon / carbon composite materials. A high performance friction material. Compared with traditional metal and semi-metal friction materials, C / C-SiC friction materials have a low density (about 2.0g / cm 3 ), corrosion resistance, smooth braking, high friction coefficient, and strong environmental adaptability; compared with carbon / carbon composite materials, since the SiC ceramic hard phase is introduced into the C / C-SiC material as a matrix, it not only effectively impro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/14
Inventor 肖鹏李专周伟李鹏涛
Owner HUNAN SHIXIN NEW MATERIALS CO LTD
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