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Ceramic-like friction material and preparation method thereof

A technology of friction materials and ceramics, applied in the field of friction materials, can solve problems such as poor heat resistance, achieve the effect of no attenuation of friction coefficient and improve the effect of heat decay resistance

Inactive Publication Date: 2012-08-01
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the deficiency of poor heat resistance of existing friction materials, the present invention provides a kind of ceramic friction material

Method used

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  • Ceramic-like friction material and preparation method thereof
  • Ceramic-like friction material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: Composition of raw materials: filler 52g, including barium sulfate 20g, kaolin 5g, calcium carbonate 3g, fluorite powder 10g, mineral powder 4g, chromite 5g, magnesium oxide 5g; Friction modifier 22g, including graphite 12g, three Aluminum oxide 5g, silicon carbide 5g; reinforcing fiber 46g, including pitch-based carbon fiber 15g, aramid fiber 2g, ceramic fiber 15g, glass fiber 14g; powder silicate inorganic binder 80g.

[0016] Preparation process: Add 52g of filler and 46g of reinforcing fiber into a mixer and mix evenly, then add 80g of powdered inorganic silicate binder and 22g of friction modifier and mix evenly; put the mixture into a mold at room temperature and add Compression molding, molding pressure 20MPa, pressure holding time 120s / mm; put the formed blank into a programmed temperature-controlled blast drying oven, turn on the blower, and perform heat treatment.

Embodiment 2

[0017] Example 2: Raw material composition: filler 42g, including zinc oxide 5g, barium sulfate 20g, magnesium oxide 5g, diatomaceous earth 5g, fluorite powder 5g, mineral powder 2g; friction modifier 18g, including graphite 9g, aluminum oxide 4g, 5g of silica; 20g of reinforcing fiber, including 5g of polyacrylonitrile-based carbon fiber, 5g of glass fiber, 8.5g of steel fiber, 1.5g of aramid fiber; 120g of powdered silicate inorganic binder.

[0018] Preparation process: Add 42g of filler and 20g of reinforcing fiber into a mixer and mix evenly, then add 120g of powdered inorganic silicate binder and 18g of friction modifier and mix evenly; put the mixture into a mold at room temperature and add Compression molding, molding pressure 30MPa, pressure holding time 100s / mm; put the formed blank into a programmed temperature-controlled blast drying oven, turn on the blower, and perform heat treatment.

Embodiment 3

[0019] Embodiment 3: Composition of raw materials: filler 30g, including zinc oxide 4g, barium sulfate 12g, kaolin 4g, calcium carbonate 4g, fluorite powder 6g; friction modifier 0g; reinforcing fiber 60g, including polyacrylonitrile-based carbon fiber 15g, aramid fiber Fiber 2g, copper fiber 10g, glass fiber 8g, non-asbestos mineral fiber 25g; powder silicate inorganic binder 110g.

[0020] Preparation process: Add 30g of filler and 60g of reinforcing fiber into the mixer and mix evenly, then add 110g of powdered inorganic silicate binder and mix evenly; put the mixture into a mold at room temperature and press molding, the molding pressure is 60MPa , The holding time is 60s / mm; put the formed blank into the programmed temperature-controlled blast drying oven, turn on the blower, and carry out heat treatment.

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Abstract

The invention discloses a ceramic-like friction material and a preparation method thereof, and is used for solving the technical problem that the friction material prepared by the traditional method is poor in heat resistance. The technical scheme is as follows: in the components of the friction material, powdery silicate inorganic binder replaces the organic binder in the prior art to prepare the ceramic-like high-temperature-resistant friction material, so that the heat fading resistance of the friction material is improved. The preparation method of the ceramic-like friction material adopts a preparing process of organically synthesizing the friction material, the friction material with ceramic characteristics is prepared by dry-process mixing and low-temperature treatment, and by test with a constant speed testing machine, the result shows that the friction factor does not attenuate at 400 DEG C.

Description

technical field [0001] The invention relates to a friction material, in particular to a kind of ceramic friction material, and also relates to a preparation method of the kind of ceramic friction material. Background technique [0002] The friction material used for automobile braking mainly reduces the relative motion between the friction material and the attached parts through friction, converts kinetic energy into heat energy, and then absorbs or dissipates the heat. With the development of high speed and heavy load in the automobile industry, the corresponding requirements for brake friction materials are becoming more and more stringent. Taking a car as an example, when the vehicle speed is 50-100-200km / h, the thermal load of the brake will reach 67.5-270-1080 kcal, and the absorbed energy of the braking material is basically the square of the vehicle speed. It is directly proportional; in order to ensure the stability and braking safety of the car at high speed, the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/14C04B28/04
Inventor 付业伟施俭亮李贺军齐乐华朱文婷
Owner NORTHWESTERN POLYTECHNICAL UNIV
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