Ceramic-based composite material for brake disc of high-speed train and preparation method of ceramic-based composite material

A composite material, a technology for high-speed trains, applied in the field of ceramic matrix composite materials for high-speed train brake discs and their preparation, can solve the problems to be further improved, and achieve the effects of easy and uniform adhesion, prevention of oxidation, and small degree of mechanical and thermal damage

Inactive Publication Date: 2015-05-06
QINGDAO MATE RUIOU NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the comprehensive performance of C / SiC (carbon fiber reinforced carbonized brick) ceramic matrix composites for high-speed train brake discs still needs to be further improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Use T700-12K non-weft fabric and T700-12K net tire to prepare needle felt, and its bulk density is about 0.50g / cm 3 . Using CVI process, polycarbosilane PCS is used as the precursor, nitrogen is used as the dilution gas, and the reaction temperature is 1500°C to prepare the C / C composite body. The bulk density of the C / C composite body is about 0.65g / cm 3 . HfO 2 Add the micropowder into the isopropanol solution of polyvinylpyrrolidone K17 (PVPK17) while grinding to form a modified HfO2 Micropowder, the mass ratio of isopropanol solution of polyvinylpyrrolidone K17 (PVPK17) to HfO2 micropowder is 5:1. will modify HfO 2 The micropowder is dispersed in the phenolic resin to form a suspension, and the mass ratio of the modified HfO2 micropowder to the phenolic resin is 1:6. The C / C composite body is immersed in the suspension, and heated to 1900° C. in a hydrogen atmosphere to generate HfC. Mix absolute ethanol, tri-n-butyl borate, and acetic acid in a ratio of 1:3:3 ...

Embodiment 2

[0033] Use T700-12K non-weft fabric and T700-12K net tire to prepare needle felt, and its bulk density is about 0.50g / cm 3 . Using CVI process, polycarbosilane PCS is used as the precursor, nitrogen is used as the dilution gas, and the reaction temperature is 1700°C to prepare the C / C composite body. The bulk density of the C / C composite body is about 0.70g / cm 3 . HfO 2 Add the micropowder into the isopropanol solution of polyvinylpyrrolidone K17 (PVPK17) while grinding to form a modified HfO 2 Micronized powder, solution of polyvinylpyrrolidone K17 (PVPK17) in isopropanol with HfO 2 The mass ratio of fine powder is 5:1. Disperse the modified HfO2 micropowder in the phenolic resin, which forms a suspension, and the modified HfO 2 The mass ratio of fine powder and phenolic resin is 1:6. The C / C composite body is immersed in the suspension, and heated to 2000°C under hydrogen atmosphere to react to generate HfC. Mix absolute ethanol, tri-n-butyl borate, and acetic acid in...

Embodiment 3

[0036] Use T700-12K non-weft fabric and T700-12K net tire to prepare needle felt, and its bulk density is about 0.60g / cm 3 . Using CVI process, polycarbosilane PCS is used as the precursor, nitrogen is used as the dilution gas, and the reaction temperature is 1800°C to prepare the C / C composite body. The bulk density of the C / C composite body is about 0.80g / cm 3 . HfO 2 Add the micropowder into the isopropanol solution of polyvinylpyrrolidone K17 (PVPK17) while grinding to form a modified HfO 2 Micropowder, the mass ratio of isopropanol solution of polyvinylpyrrolidone K17 (PVPK17) to HfO2 micropowder is 5:1. will modify HfO 2 The fine powder is dispersed in the phenolic resin, which forms a suspension, and the modified HfO 2 The mass ratio of fine powder and phenolic resin is 1:6. The C / C composite body is immersed in the suspension, and heated to 2000°C under hydrogen atmosphere to react to generate HfC. Mix absolute ethanol, tri-n-butyl borate, and acetic acid in a r...

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Abstract

The invention provides a ceramic-based composite material for a brake disc of a high-speed train and a preparation method of the ceramic-based composite material. The ceramic-based composite material is prepared from the following components in percentage by volume: 32 to 62% of C fibers, 12 to 22% of a C substrate, 4 to 12% of an HfC substrate, and 10 to 34% of a ZrB2 substrate. According to the ceramic-based composite material, the advantages of the C/ C composite material, HfC and ZrB2 are combined, so that the thermal stress caused by thermal shock can be effectively relieved, and as a result, the thermal shock resistance can be obviously improved; the ceramic-based composite material has a good application prospect in the brake disc of the high-speed train.

Description

technical field [0001] The invention belongs to the field of ceramic-based composite materials, and in particular relates to a ceramic-based composite material used for high-speed train brake discs and a preparation method thereof. technical background [0002] The brake disc is a key component of the Class A braking system of a motor vehicle, and its performance is directly related to the safety and reliability of the motor vehicle operation. Carbon / carbon (C / C) composite brake discs have a series of excellent properties such as corrosion resistance, wear resistance, oxidation resistance, and high friction coefficient. C / C composites are easy to crack, and the C fibers are easily damaged, seriously affecting their mechanical properties. In order to prevent the C fibers from being damaged and ensure that the strength of the composite material does not decrease, the C / C skeleton is usually prepared on the C fiber braid in the prior art, which protects the C fibers. At the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/83C04B35/58C04B35/622
Inventor 岑伟郭雷
Owner QINGDAO MATE RUIOU NEW MATERIAL TECH CO LTD
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