针刺毡C/C复合材料磨擦制动压力和速度特性

复合材料学报, 2003, 20(3): 41-46. doi: 10.3321/j.issn:1000-3851.2003.03.009

针刺毡C/C复合材料磨擦制动压力和速度特性

熊翔 ^1, , 黄伯云 ^2, , 徐惠娟 ^3, , 吉冬英 ^4, , 彭剑昕 ^5,

1.中南大学,粉末冶金国家重点实验室,长沙,410083

2.中南大学,粉末冶金国家重点实验室,长沙,410083

3.中南大学,粉末冶金国家重点实验室,长沙,410083

4.中南大学,粉末冶金国家重点实验室,长沙,410083

5.中南大学,粉末冶金国家重点实验室,长沙,410083

基金项目: 国家工业性试验项目(计高技(1998)1817)

关键词： C/C复合材料 , 针刺毡 , 制动速度 , 摩擦磨损

FRICTIONAL AND WEAR BEHAVIORS OF THE C/C COMPOSITE FROM A NEEDLED FELT AT DIFFERENT BRAKING PRESSURES AND SPEEDS

用模拟刹车制动的摩擦试验机,研究探讨了一种针刺毡结构C/C复合材料在不同制动压力和制动速度下的摩擦磨损性能,并用扫描电子显微镜对摩擦表面进行了观察和分析.摩擦磨损机理由磨屑经挤压、剪切堆积在表面形成的磨屑层所决定.在5 m/s制动速度或静态条件下,表面温度低(<150～200 ℃)吸附水气未脱附,其润滑作用导致了较低的摩擦系数值;当制动速度达到10 m/s,摩擦使表面温度升高,达到了吸附水气脱附温度,引起摩擦系数急剧升高,达到了最大;此后,随制动速度及表面温度的继续升高,磨屑层间剪切强度降低,导致摩擦系数随之下降.在较高制动速度下,该种材料仍能保持较高的摩擦系数,显示出优良的高温高能摩擦性能.

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针刺毡C/C复合材料磨擦制动压力和速度特性

FRICTIONAL AND WEAR BEHAVIORS OF THE C/C COMPOSITE FROM A NEEDLED FELT AT DIFFERENT BRAKING PRESSURES AND SPEEDS

参考文献