酚醛纤维增强纸基摩擦材料的性能研究

Performance of Phenolic Fiber Reinforced Paper-based Friction Material

采用湿式成型工艺制备出5种不同酚醛纤维含量的纸基摩擦材料,研究了酚醛纤维含量对纸基摩擦材料各项性能的影响.通过力学试验机测试了材料剪切强度和压缩-回弹性能,利用同步热分析仪和湿式摩擦试验机测试了材料热性能及摩擦磨损性能,通过扫描电镜观察材料摩擦表面和剪切断裂面的微观形貌.结果表明:随着酚醛纤维含量的增加,材料层间剪切强度逐渐提高,而压缩率变化较小,回弹率先增大后减小;材料耐热性随酚醛纤维含量的增加而降低;随着酚醛纤维含量的增加,磨损率逐渐降低,同时摩擦系数保持稳定.

Five kinds of paper-based friction materials with different phenolic fiber(PF) contents were prepared using paper-making process,and the effect of PF content on performance of the material was studied. The shear strength and compressure-resilience capability of the samples were measured by an electronic universal testing machine. The thermal properties and friction performance were severally tested using a thermal analyzer and a wet friction performance tester. The microstructure and morphology of the shear fracture surfaces and worn surfaces were investigated by scanning electron microscopy. The results reveal that with the increasing PF content,the shear strength increased gradually. The PF content had little effect on compressibility; however,the resilience rate first rose and then declined as the PF content increased. The thermal resistance and the wear rate decreased while the friction coefficient remained stable with the increasing PF content.