摘要
制备了纳米Al_2O_3改性PTFE复合保持架材料,研究了不同纳米Al_2O_3含量对复合材料硬度、压缩强度、拉伸强度及摩擦性能的影响。通过对复合保持架材料摩擦磨损机理分析认为,纳米Al_2O_3质量分数为5%时,复合保持架材料结构最稳定,对比了该配方复合材料常温、液氮、液氢下力学性能。结果表明:与常温相比,液氮和液氢温度下复合保持架材料的拉伸强度和弹性模量有所增加,冲击强度有所下降,断裂伸长率显著下降,呈典型脆性材料特性。
The PTFE composite cage material modified with nano- Al2O3 is prepared. The influence of different contents of nano- Al2O3 on hardness,compression strength,tensile strength and friction performance of composite material is studied. Through analysis of friction and wear mechanism of composite material for cages,it is suggest that the structure of composite material with 5%（ mass） nano- Al2O3 is the most stable,and the mechanical properties of composite material are compared under normal temperature,liquid nitrogen and liquid hydrogen conditions. The results show that compared with normal temperature,the tensile strength and elastic modulus of composite material for cages are increased,and the impact strength and elongation at breakis decreased,which shows typical properties of brittle material under liquid nitrogen and liquid hydrogen temperatures.
出处
《轴承》
北大核心
2016年第6期35-38,共4页
Bearing
基金
国际合作专项(2013DFB70350)
