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Carbon-ceramic brake disc with multi-layer structure and preparation method of carbon-ceramic brake disc

A carbon-ceramic brake disc, multi-layer structure technology, applied in the direction of brake disc, brake type, brake parts, etc., can solve the spalling of Si/SiC composite ceramic layer, affecting the braking performance of carbon-ceramic brake disc, thermal expansion Coefficient mismatch and other problems can be achieved to improve bonding performance, increase service life and relieve thermal stress

Pending Publication Date: 2021-12-28
HUNAN SHIXIN NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through research, it is found that for carbon ceramic brake discs with Si / SiC composite ceramic layers on the surface, in this low-temperature saline-alkali environment, during high-speed braking, the Si / SiC composite ceramic layers on the surface are prone to peeling off. The problem, through research, it is found that the main reason for the peeling of the Si / SiC composite ceramic layer is due to the uneven material composition at the interface between the Si / SiC composite ceramic layer and the carbon ceramic matrix, especially the presence of some silicon aggregates, which are easy to This leads to the spalling of the Si / SiC composite ceramic layer during the braking process under the conditions of low-temperature saline-alkali environment; in addition, the Si / SiC composite ceramic layer and the carbon-ceramic matrix have thermal expansion coefficients that do not match. , the carbon ceramic brake disc with Si / SiC composite ceramic layer will undergo the process of rapid heating and cooling, which will also lead to the peeling off of the Si / SiC composite ceramic layer, which will eventually affect the braking performance of the carbon ceramic brake disc

Method used

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  • Carbon-ceramic brake disc with multi-layer structure and preparation method of carbon-ceramic brake disc

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Preparation of friction layer green body: phenolic resin 30wt%, silicon carbide powder (10um particle size) 50wt%, silicon powder (100um particle size) 10wt% and chopped carbon fiber (3K, length 0.1mm) 10wt% The mixture was molded at a pressure of 0.1 MPa, cured at 160° C. for 1 hour, and then carbonized at 800° C. for 3 hours to obtain a friction layer green body with a thickness of 1 mm.

[0050] It is made by alternately stacking one layer of non-weft cloth and one layer of net tire and needling layer by layer. The orientation of the long carbon fibers in the two adjacent layers of carbon cloth or non-weft cloth is laid according to 0° / 90° until the thickness is obtained. It is the first carbon fiber prefabricated body of 25mm, and then lay the full net tire layer on the surface of the first carbon fiber prefabricated body, and then perform carbon fiber needle punching perpendicular to the direction of the pavement interface to connect and combine the first carbon fib...

Embodiment 2

[0059] Preparation of the friction layer green body: the mixture of furan resin 50wt%, silicon carbide powder (100um in particle size) 30wt%, and silicon powder (10um in particle size) 20wt% is subjected to compression molding. The molding pressure is 2MPa, at 220 °C for 1 h, and then carbonized at 1000 °C for 1 h to obtain a friction layer green body with a thickness of 4 mm.

[0060] It is made by alternately stacking one layer of non-weft cloth and one layer of net tire and needling layer by layer. The orientation of the long carbon fibers in the two adjacent layers of carbon cloth or non-weft cloth is laid according to 0° / 90° until the thickness is obtained. It is the first carbon fiber prefabricated body of 35mm, and then the full net tire layer is laid on the surface of the first carbon fiber prefabricated body, and then carbon fiber needle punching is performed perpendicular to the direction of the pavement interface to connect and combine the first carbon fiber prefabri...

Embodiment 3

[0069] Preparation of friction layer green body: a mixture of 40wt% phenolic resin, 40wt% silicon carbide powder (100um particle size), 10wt% silicon carbide powder (10um particle size) and 10wt% chopped carbon fiber (7K, 3mm in length) Compression molding was carried out at a pressure of 1 MPa, curing at 180° C. for 1.5 hours, and carbonization at 900° C. for 1.5 hours to obtain a friction layer green body with a thickness of 2.5 mm.

[0070] It is made by alternately stacking one layer of non-weft cloth and one layer of net tire and needling layer by layer. The orientation of the long carbon fibers in the two adjacent layers of carbon cloth or non-weft cloth is laid according to 0° / 90° until the thickness is obtained. It is the first carbon fiber prefabricated body of 30mm, and then lay the full mesh tire layer on the surface of the first carbon fiber prefabricated body, and then perform carbon fiber needle punching perpendicular to the direction of the pavement interface to ...

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Abstract

The invention discloses a carbon-ceramic brake disc with a multi-layer structure and a preparation method of the carbon-ceramic brake disc. The carbon-ceramic brake disc sequentially comprises a carbon-ceramic base body, a ceramic layer, a bottoming layer, a bonding layer and a friction layer from inside to outside, wherein the carbon-ceramic base body takes a first carbon fiber prefabricated body as a reinforcing body and takes carbon and ceramic as a base body; the ceramic layer takes a full-net tire layer as a reinforcement body and takes carbon and ceramic as a matrix; the carbon fiber prefabricated body and the full-net tire layer are connected and combined into a second carbon fiber prefabricated body through carbon fiber needling, and the friction layer is a Si / SiC composite ceramic layer and is integrally bonded with the ceramic layer and the carbon ceramic base body through the base layer and the bonding layer. According to the carbon-ceramic brake disc, the transitional ceramic layer is arranged, so that the situation that material components at the interface between the Si / SiC composite ceramic layer and the carbon-ceramic base body are not uniform is avoided, and thermal stress generated by mismatching of thermal expansion coefficients between the friction layer and the carbon-ceramic base body can be effectively relieved, and therefore, peeling of the Si / SiC composite ceramic layer in the high-speed braking process is avoided.

Description

technical field [0001] The invention relates to a carbon ceramic brake disc with a multilayer structure and a preparation method thereof, belonging to the technical field of preparation technology of carbon fiber reinforced ceramic matrix composite materials. Background technique [0002] Carbon fiber-reinforced carbon / silicon carbide ceramic matrix composites (C / C-SiC, referred to as carbon ceramics) have the characteristics of high strength and toughness of carbon fibers and high wear resistance of silicon carbide ceramic materials. Therefore, it can be used as a A high-performance friction material is used in the field of rail transportation or automobile braking. At the same time, carbon-ceramic composite materials have light weight, high temperature resistance and stable braking friction coefficient, which well meet the current requirements of lightweight, energy saving and environmental protection. [0003] At present, the last thermal process of carbon-ceramic brake ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D65/12C04B35/83C04B35/565C04B35/80C04B37/00C04B41/85C04B41/88C04B41/00C04B41/50C04B41/51
CPCF16D65/125C04B35/83C04B35/565C04B35/80C04B37/003C04B41/85C04B41/88C04B41/009C04B41/5096C04B41/51F16D2065/132F16D2200/0039F16D2200/0043F16D2200/0047F16D2200/0078F16D2200/0082F16D2250/0069C04B2235/428C04B2235/5248C04B2235/77C04B2237/08C04B2237/083C04B2237/58C04B2237/72C04B2237/76C04B2235/96C04B41/4523
Inventor 鲍思权陈振宇周娩红
Owner HUNAN SHIXIN NEW MATERIALS CO LTD
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