Ti_(2)SnC纳米片增强PTFE基复合材料的摩擦磨损性能  

Friction and wear properties of Ti_(2)SnC nanosheets reinforced PTFE-based composites

作　　者：吴海江 朱家乐[1,2,3] 杨丹 许剑光 WU Haijiang;ZHU Jiale;YANG Dan;XU Jianguang(School of Mechanical and Energy Engineering,Shaoyang University, Shaoyang 422000, China;Key Laboratory of Hunan Province for Efficient Power System and Intelligent Manufacturing,Shaoyang University, Shaoyang 422000, China;School of Materials Science and Engineering,Yancheng Institute of Technology, Yancheng 224051, China)

机构地区：[1]邵阳学院机械与能源工程学院,湖南邵阳422000 [2]邵阳学院高效动力系统智能制造湖南省重点实验室,湖南邵阳422000 [3]盐城工学院材料科学与工程学院,江苏盐城224051

出　　处：《功能材料》2022年第1期1141-1146,共6页Journal of Functional Materials

基　　金：国家自然科学基金项目(21671167);湖南省教育厅资助科研项目(20K112);高效动力系统智能制造湖南省重点实验室开放研究基金项目(19KF01)。

摘　　要：为探讨Ti_(2)SnC纳米片含量对聚四氟乙烯(PTFE)基复合材料摩擦磨损性能的影响。采用超声剥离Ti_(2)SnC块体材料的方法获得了Ti_(2)SnC纳米片,并以此为原料通过冷压烧结的方法制备了Ti_(2)SnC纳米片/PTFE复合材料。研究了Ti_(2)SnC纳米片含量对复合材料硬度和相同载荷下摩擦磨损性能的影响,以及不同载荷对纯PTFE和10%(质量分数)Ti_(2)SnC纳米片/PTFE复合材料摩擦磨损性能的影响。结果表明,相比于纯PTFE材料,复合材料的硬度随Ti_(2)SnC纳米片含量的增加而增加,其中10%(质量分数)Ti_(2)SnC纳米片/PTFE复合材料维氏硬度达到了12.5,增长了17.9%。在载荷为20 N时,复合材料的摩擦系数和磨损率随Ti_(2)SnC纳米片含量的增加而减小,相比于纯PTFE材料,10%(质量分数)Ti_(2)SnC纳米片/PTFE复合材料摩擦系数降低了34.7%,磨损率降低了80.6%;载荷增加后,与纯PTFE相反,10%(质量分数)Ti_(2)SnC纳米片/PTFE复合材料的摩擦系数和磨损率随载荷增加而减小;当载荷增加到80 N时,相比于纯PTFE材料,10%(质量分数)Ti_(2)SnC纳米片/PTFE复合材料的摩擦系数降低了69.4%,磨损率降低了99.4%。Ti_(2)SnC纳米片表现出优秀的润滑性,加入PTFE后制备的复合材料的磨损机制以氧化磨损和粘着磨损为主,纯PTFE材料则以粘着磨损为主。This work aims to investigate the effect of the content of Ti_(2)SnC nanosheets on the friction and wear properties of Ti_(2)SnC nanosheets reinforced PTFE-based composites.The novel Ti_(2)SnC nanosheets are obtained via sonicating bulk Ti_(2)SnC with DMSO.And then Ti_(2)SnC nanosheets/PTFE composite materials are prepared by cold pressing and sintering methods.The effect of the content of this nanosheet on the hardness and friction and wear properties of the composites,and the effect of different loads on the friction and wear properties of pure PTFE and 10 wt%Ti_(2)SnC nanosheets/PTFE composites are investigated in detail.The results show that the hardness of the composites increases with the increase of Ti_(2)SnC nanosheets content compared with pure PTFE.Specifically,the Vicker’s hardness of 10 wt%Ti_(2)SnC nanosheets/PTFE composites reaches 12.5,increased by 17.9%.While the friction coefficient and wear rate show a reverse trend,under 20 N load,those of 10 wt%Ti_(2)SnC nanosheets/PTFE composites are reduced by 34.7%and 80.6%compared to those of pure PTFE,respectively.When the load is increased,the friction coefficient and wear rate of 10 wt%Ti_(2)SnC nanosheets/PTFE composites exhibit a reverse change compared with pure PTFE.Interestly,when the load is increased to 80 N,the friction coefficient and wear rate of 10 wt%Ti_(2)SnC nanosheets/PTFE composites are reduced by 69.4%and 99.4%compared to pure PTFE,respectively.Due to the excellent lubricating property of Ti_(2)SnC nanosheets,the wear mechanism of Ti_(2)SnC nanosheets/PTFE composites is mainly oxidation wear and adhesive wear,while pure PTFE is mainly adhesive wear.

关 键 词：Ti_(2)SnC纳米片 聚四氟乙烯 复合材料 摩擦磨损 硬度 

分 类 号：TB332[一般工业技术—材料科学与工程]