【作者】 汪瑾； 张进； 田明； 胡献国； Ralpf Stengler；

【Author】 WANG Jin, ZHANG Jin, T1AN Ming, HU Xian-guo, STENGLER Ralph School of Chemical Engineering, Hefei Univeraty of Technology; School of Chemical Engineering, Anhui University; Institute of Tribology, Hefei University of Technology, 4. Fachhochschule Darmstadt, D-64295 Darmstadt Germany

【机构】 合肥工业大学化工学院； 安徽大学化学化工学院； 摩擦学研究所； 德国达姆斯达特应用大学；

【摘要】 借助偏九显微镜、差示扫描量热仪等手段研究了纳米ZrO2对共POM结晶性能的影响,由洛式硬度计、拉力实验机和悬臂梁冲击实验机等仪器测定了不同添加量的纳米ZrO2／POM复合材枓的表面硬度及力学性能,采用MM-200型摩擦磨损实验机测定了干摩擦条件下不同添加量的纳米ZrO2/POM复合材料的摩擦学特性,并用扫描电镜对磨损表面进行了分析。结果表明:纳米ZrO2的加入使得POM的球晶尺寸变小,结晶温度升高,结晶速度加快,少量的添加即可起到增强增韧的效用,且可以提高共POM的耐磨性,对摩擦因数的影响不大。更多还原

【Abstract】 The polyoxymethylene (POM) matrix composites with different contents of nano-ZrO2 particles were prepared. The effect of nano-ZrO2 on the crystallization and thermal property of POM was investigated through polarizing microscopy (PLM) and differential scanning calorimetry (DSC). The surface hardness, tribological performance and mechanical properties of nano-ZrO2/POM composites were measured by Rockwell sclerometer, ring-on-block tribometer and mechanical testers, respectively. The surface morphology of the wear scar was observed by scanning electron microscope (SEM). The results showed that the nano-ZrO2 could be acted as one kind of nucleation agent in POM and then decreased the crystallite size of POM, and increased the crystal growth rate as well. The addition of nano-ZrO2 particles in POM can improve the strengthening and toughening of composites. The wear resistance was enhanced and the friction reduction was changed a little.更多还原