新型填料对高摩复合材料摩擦磨损性能影响及机制  

Effect and mechanism of new filler on friction and wear properties of high friction composites

作　　者：龚乾江 徐祥[1,2,3] 杨明[1,2,3] 

机构地区：[1]贵州大学材料与冶金学院,贵阳550025 [2]贵州大学高性能金属结构材料与制造技术国家地方联合工程实验室,贵阳550025 [3]贵州大学贵州省材料结构与强度重点实验室,贵阳550025

出　　处：《复合材料学报》2017年第10期2171-2181,共11页Acta Materiae Compositae Sinica

基　　金：贵州省工业攻关项目(黔科合GY字(2013)3037)

摘　　要：采用干法热压成型工艺制备高摩复合材料,研究了基体材料腰果壳油改性酚醛树脂(CPR)与丁晴橡胶(NR)的质量比和新型高性能填料(主要成分为石墨粉Al2O3、MoS2、Fe粉)含量对高摩复合材料摩擦磨损性能的影响规律。在摩擦磨损试验机上测试了高摩复合材料的摩擦磨损性能,利用激光共聚焦显微镜、扫描电镜对摩擦表面形貌、磨屑进行观察和分析,借助EDS测定摩擦表面成分的变化。结果表明,随着CPR与NR质量比的增加,高摩复合材料的耐热性能、结合性能大幅提高,且具有较好的摩擦磨损性能。当高性能填料含量较低时,磨损表面出现大量连续的真实接触面,磨损机制为磨粒磨损和黏着磨损;当高性能填料含量较高时,真实接触面积减少,磨损表面剥落严重,并出现较多的裂纹,其主要磨损形式转变为磨粒磨损和疲劳磨损。随着高性能填料含量的增加,摩擦表面的元素从均匀分布逐渐转变为局部富集,磨粒的尺寸逐渐变大。High friction composite materials were prepared by dry-hot molding process. The effects of proportion of mass ration of cashew oil modified phenolic resin to nitrile rubber, and the high performance filler （Main compo- nents are graphite powder, Alz Oa. MoSz and Fe powder） on the tribological performances of high friction composite materials were studied, respectively. The friction and wear behaviors of the composites were evaluated using a ring- on-block test rig. The worn surfaces and wear debris of high friction composites were analyzed by means of Laser Scanning Confocal Microscopy, SEM and EDS. The results show that the heat resistance and the adhesion are im- proved with the increasing of mass ratio of CPR to NR, which ensures good friction and wear properties. When the high performance filler content is low, a large number of wear surface and continuous real contact plateaus are formed on the wear surface, and the wear mechanisms are abrasive wear and adhesive wear. When the filler content is higher, the real contact plateaus decreases, severe surface spalling occures and more cracks are formed on the sur- face, and the wear mechanisms are abrasive wear and fatigue wear. With the increase of high performance filler, the friction surface elemental distribution changes from uniformly distributed to local enrichment, and the size of the ab- rasive grain gets bigger.

关 键 词：复合材料 高性能填料 实际接触面 摩擦磨损 

分 类 号：TB332[一般工业技术—材料科学与工程] U260.35[机械工程—车辆工程]