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Structure function integrated C/C-Si friction material and preparation method thereof

A friction material and functional technology, applied in the field of structure-function integrated C/C-SiC friction material and preparation, can solve the problems of high preparation cost, unstable friction performance, delamination, etc. Cycle, the effect of improving the stability of friction performance

Active Publication Date: 2018-05-18
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to avoid the deficiencies of the prior art, the present invention proposes a structure-function integrated C / C-SiC friction material and its preparation method to solve the problem of unstable friction performance and preparation of C / C-SiC friction materials with a three-dimensional needle-punched structure. The high cost and the serious delamination of the sandwich structure C / C-SiC friction material

Method used

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  • Structure function integrated C/C-Si friction material and preparation method thereof
  • Structure function integrated C/C-Si friction material and preparation method thereof
  • Structure function integrated C/C-Si friction material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0032] Step 1.1: First, make PAN-based T-300 (6-50K) carbon fiber into short-fiber mesh tires and non-weft fabrics, then stack the single-layer mesh tires to a certain thickness, and then adopt the method of relay acupuncture to make them integrated , to obtain the anti-wear layer carbon fiber preform structure A1, whose bulk density is 0.2g / cm 3 .

[0033] Step 1.2: Then prepare the stress relief layer carbon fiber prefabricated body structure B1 on the structure of step 1.1. The preparation method is to make a single layer of 0° no-weft fabric, 1-10 layers of carbon fiber mesh tire, 90° no-weft fabric, 1-10 layers The carbon fiber mesh tires are stacked in sequence to a certain thickness, and then the relay needle punching method is used to make it integrated with the anti-wear layer carbon fiber prefabricated structure A1 prepared in step 1.1. During the layering process, it is necessary to gradually reduce the number of mesh layers and the spacing between fiber bundles in...

Embodiment 2

[0040] Step 2.1: First, make PAN-based T-300 (6-50K) carbon fiber into short-fiber mesh tires and non-weft fabrics, then stack the single-layer mesh tires to a certain thickness and then use relay-type acupuncture to make them integrated , to obtain the anti-wear layer carbon fiber preform structure A1, whose bulk density is 0.2g / cm 3 .

[0041] Step 2.2: Then prepare the stress relief layer carbon fiber prefabricated body structure B1 on the structure of step 1.1. The preparation method is to make a single layer of 0° no weft cloth, 1 to 10 layers of carbon fiber mesh, 90° no weft cloth, 1 to 10 layers The carbon fiber mesh tires are stacked in sequence to a certain thickness, and then the relay needle punching method is used to make it integrated with the anti-wear layer carbon fiber prefabricated structure A1 prepared in step 1.1. During the layering process, it is necessary to gradually reduce the number of mesh layers and the distance between the fiber bundles in the non...

Embodiment 3

[0048] Step 3.1: First, make PAN-based T-300 (6-50K) carbon fiber into short-fiber mesh tires and non-weft fabrics, then stack the single-layer mesh tires to a certain thickness, and then adopt the method of relay acupuncture to make them integrated , to obtain the anti-wear layer carbon fiber preform structure A1, whose bulk density is 0.2g / cm 3 .

[0049] Step 3.2: Then prepare the stress relief layer carbon fiber prefabricated body structure B1 on the structure of step 1.1. The preparation method is to make a single layer of 0° no weft cloth, 1-10 layers of carbon fiber mesh, 90° no weft cloth, 1-10 layers The carbon fiber mesh tires are stacked in sequence to a certain thickness, and then the relay needle punching method is used to make it integrated with the anti-wear layer carbon fiber prefabricated structure A1 prepared in step 1.1. During the layering process, it is necessary to gradually reduce the number of mesh layers and the distance between the fiber bundles in t...

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Abstract

The invention relates to a structure function integrated C / C-Si friction material and a preparation method thereof. The C / C-Si friction material comprises a mechanical structure layer, stress relief layers, and abrasion resistant layers. The mechanical structure layer contains a lot of laid fabric long fiber, and can improve the structural strength of the material; the abrasion resistant layers contain evenly distributed chopped carbon fiber, SiC, Si and a pyrolytic carbon phase, and can improve the wear resistance and friction performance stability of the material; the stress relief layers contain laid fabric long fiber in gradient distribution along a vertical ply direction, can relieve the thermal mismatch problem of the abrasion resistant layers and the mechanical structure layer during material preparation, and ensure the material structural integrity. The method provided by the invention is free of crusting phenomenon in preparation of a low density carbon / carbon composite material by chemical vapor deposition, can greatly reduce the preparation cycle of low density carbon / carbon composite material by chemical vapor deposition, and then reduces the preparation cycle and costof carbon ceramic friction material, and improves the friction performance stability. The technological method is suitable for industrial production.

Description

technical field [0001] The invention belongs to the field of carbon-ceramic friction materials, and relates to a structure-function integrated C / C-SiC friction material and a preparation method. Background technique [0002] With the continuous development of aircraft, trains, automobiles, wind turbines and other modern vehicles and power machinery to high speed and high energy load, higher performance requirements are put forward for brake friction materials. For example, high friction stability, higher safety, reliability, harsher environmental adaptability, higher braking efficiency, etc. [0003] At present, one of the main ways to prepare C / C-SiC friction materials is to deposit pyrolytic carbon on carbon fiber preforms to prepare C / C preforms by isothermal chemical vapor infiltration, and then infiltrate the C / C preforms with liquid silicon. The three-dimensional needle-punched carbon fiber prefabricated body is the most widely used. It consists of a single layer of 0...

Claims

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Application Information

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IPC IPC(8): C04B35/83C04B35/80C04B35/565C04B35/573C04B35/622
CPCC04B35/565C04B35/573C04B35/622C04B35/806C04B35/83C04B2235/428C04B2235/5248C04B2235/5256C04B2235/616
Inventor 范尚武杨川何留阳马旭张立同成来飞
Owner NORTHWESTERN POLYTECHNICAL UNIV
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