摘要
为研究碳粉粒度对腰果壳油改性酚醛树脂(PF)基摩擦材料性能的影响,采用热压成型工艺制备出4种不同碳粉粒度(48,25,18,9μm)的PF基摩擦材料,分别对摩擦材料的密度、硬度、压缩强度、冲击强度、热性能和摩擦磨损性能进行了测试。结果表明,碳粉粒度越小,摩擦材料的密度和硬度越高,力学性能越好,高温下的摩擦系数越稳定,且磨损率及200℃时的热膨胀系数越小,热稳定性能越好;当碳粉粒度为9μm时,摩擦材料密度为1.725 g/cm3,洛氏硬度值为92,压缩强度为109.8 MPa,冲击强度为3.72 k J/m2,350℃下的磨损率为1.12×10–7 cm3/(N·m),200℃下的线膨胀系数为1.55×10–5/℃,失重速率最大时的温度为441.3℃,750℃质量保持率为88.6%。摩擦材料中碳粉适宜的粒径为9μm。
In order to figure out the effects of particle size of carbon powder on properties of cashew nut oil modified phenolic resin matrix friction materials, four kinds of carbon powder with different particle sizes （48,25,18,9 μ m） used as the strength agents were added into the friction materials through hot compression molding process. The density, hardness, compression strength and impact strength of the materials were tested, the thermal properties, friction and wear performances were measured by thermal instruments and friction tester. The results show that when the particle size of the carbon powder is smaller, the material has higher density, hardness and mechanical properties, more stable friction coefficient under high temperature with less wear rate, less linear expansion coefficient under 200℃ and better thermal stability. When the particle size of the carbon powder is 9μ m, the density, Rockwell hardness value, compression strength and impact strength of the material is 1.725 g/cm3, 92,109.8 MPa and 3.72 kJ/ m2 respectively, the wear rate is 1.12 × 10^-7 cm3/（N. m） under 350 ℃, the linear expansion coefficient is 1.55 × 10^-5 / ℃ under 200℃, the temperature at highest weight loss rate is 441.3℃, and the residual mass ratio is 88.6% under 750℃. The appropriate particle size of the carbon powder in the friction material is 9μ m.
出处
《工程塑料应用》
CAS
CSCD
北大核心
2015年第5期7-12,共6页
Engineering Plastics Application
关键词
摩擦材料
碳粉粒度
摩擦磨损
热性能
friction material
particle size of carbon powder
friction and wear
thermal property
