硅氧铝陶瓷纤维含量对半金属摩擦材料摩擦磨损性能的影响

采用冷压成型及热压固化工艺制备钢纤维/硅氧铝陶瓷纤维混杂增强酚醛树脂半金属摩擦材料,在DMS-150型定速摩擦磨损试验机上研究了不同硅氧铝陶瓷纤维含量对材料的摩擦热衰退性能、恢复性能以及磨损性能的影响,借助扫描电子显微镜观察磨损表面形貌并分析其磨损机制.结果表明,添加质量分数5%以上硅氧铝陶瓷纤维,能够使摩擦材料的抗热衰退性能得到显著改善,但恢复性能有所下降,磨损率稍有升高,磨损机制由粘着磨损转变为粘着磨损与磨粒磨损的复合形式.

Effect of Ceramic Fiber Content on Tribology Properties of Semi-metal Friction Material

Semi-metal friction material containing aluminum-silicon fiber was prepared. Effects of aluminum-silicon fiber content on fade, recovery and wear properties of semi-metal friction material were studied using DMS-150 friction tester. Morphologies of the wear surfaces were observed by scanning electron microscopy. Heat fading resistant property of friction material was improved obviously when the content of aluminum-silicon wool was more than 5wt. %, but at the mean time the property of recovery descended and wear rate increased lightly. The wear meehanism was adhesive wear for semi-metal friction material, while the wear mechanism for material with hybrid fiber was a mixing of adhesive and abrasive wear.