A carbon-based ceramic friction material and its application

Abstract

The invention relates to the technical field of friction materials, in particular to a carbon-based ceramic friction material and use thereof, comprising the following raw materials in parts by weight: 20-40 parts of ceramic fibers, 5-9 parts of quartz fibers, 1-3 parts of steel fibers, 1-3 parts of aluminum fibers, 10-18 parts of sisal fibers, 0.8-1.4 parts of friction performance modifiers, 20-30 parts of fillers, and 2-4 parts of binders; the friction material of the present invention has no thermal recession, and the friction coefficient is stable, Good friction performance, stable braking, sensitive and reliable, low hardness, low wear rate, no damage to the pair, used in the manufacture of brake pads, making the brake pads high temperature resistance, wear resistance, ablation resistance, high specific strength, high Specific modulus, low noise, small thermal expansion coefficient, short running-in period, low braking dust and stable friction braking torque.

Description

technical field [0001] The invention relates to the technical field of friction materials, in particular to a carbon-based ceramic friction material and its application. Background technique [0002] With the development of vehicles in the direction of environmental protection, high speed and heavy load, people put forward higher requirements on the performance of automobile braking materials, especially in high temperature braking, the stability and safety of materials are very important. Therefore, developing and researching a kind of high-performance automobile brake material is the task of top priority of today's friction material industry. [0003] As a new type of brake pad, ceramic brake pads have great advantages in braking performance, life and environmental impact. Ceramic brake pads are mainly composed of binders, reinforcing fibers, friction modifiers and fillers. Ceramic-based friction materials have low density, high wear resistance, and stable high-temperatu...

AI Technical Summary

Problems solved by technology

Ceramic-based friction materials have low density, high wear resistance, and stable high-temperature performance, but poor toughness, thermal conductivity, and air permeability, and there are defects such as friction fading and insufficient mechanical strength in braking performance.

[0004] In addition to ceramic-based friction materials, there are also metal-based, semi-metal-based, carbon-based, etc., but metal-based friction materials, such as iron-based friction materials, have a high friction coefficient, good heat resistance, high strength, and low cost, but they are easy to match with the dual The friction coefficient above 600°C has poor stability, poor wear resistance, and the friction surface is easy to oxidize. Copper-based friction materials have good thermal conductivity, stable friction coefficient, and low wear rate, but the cost is high and the high temperature performance is not good. Stable; semi-metallic friction material has good thermal conductivity and wear resistance, high friction coefficient, but when the temperature is above 350 ℃, the friction performance is not stable enough, and problems such as thermal decay rate and high hardness often occur in the braking process; carbon-based friction material It has the advantages of good thermal stability at high temperature (below 2000°C), wear resistance and low density, but in a humid environment at room temperature, the friction surface is easily oxidized, which strongly affects the stability of the friction coefficient and wear rate, and the preparation cycle is long and higher cost

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