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研究了25%(质量分数)玻璃纤维增强PA66复合材料(25%GF/PA66)在干摩擦和水润滑条件下与Al2O3陶瓷之间的摩擦磨损行为。采用激光共聚焦扫描显微镜、扫描电子显微镜、傅里叶变换红外光谱仪和X射线光电子能谱分析仪对25%GF/PA66的组织、磨损形貌和磨损表面的化学结构变化进行分析。结果表明:相同实验载荷时,润滑条件下25%GF/PA66的摩擦系数小于干摩擦条件下的摩擦系数,但磨损体积却远远大于干摩擦条件下的磨损体积。在有水存在的条件下,机械微切削作用持续发生,温度的升高使25%GF/PA66试样变形,同时引起酰胺基团发生水解,C—C键大量断裂,导致磨损体积增加。采用扩展表面一般导热模型计算本实验所用材料的热软化温度为105.9℃。
The friction and wear behavior between 25% (mass fraction) glass fiber reinforced PA66 composites (25% GF / PA66) and Al2O3 ceramics under dry and water lubrication conditions were investigated. The changes of the chemical structure of the 25% GF / PA66 tissue, wear morphology and wear surface were analyzed by laser confocal scanning microscopy, scanning electron microscopy, Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. The results show that under the same experimental load, the friction coefficient of 25% GF / PA66 under lubrication condition is smaller than that under dry friction condition, but the wear volume is much larger than the wear volume under dry friction condition. In the presence of water, mechanical micro-cutting continued to occur, the temperature of 25% GF / PA66 sample deformation, while causing hydrolysis of amide groups, C-C bond a large number of fracture, resulting in increased wear volume. The thermal softening temperature of the material used in this experiment was calculated to be 105.9 ° C using the extended surface general thermal conductivity model.