摘要
采用特殊的化学及物理处理方法,在钛合金表面制备TiO2-PTFE复合膜层,该润滑膜由硬质阳极氧化膜与低摩擦系数的聚四氟乙烯(PTFE)结合而成,具有较好的自润滑特性。研究了TiO2-PTFE复合膜层的组织形貌、物相组成以及元素组分,讨论了阳极氧化处理工艺和涂覆时间对PTFE涂覆量的影响。结果表明,TC4钛合金阳极氧化后形成了由锐钛相和金红石相双相晶型组成的纳米级TiO2多孔膜,涂覆PTFE后,表面及膜孔处被PTFE聚合体所覆盖。TC4钛合金样品经过不同电压和不同氧化时间处理后,PTFE涂覆量趋于稳定。随着涂覆时间的延长,PTFE涂覆量逐渐增加,在最初5～20min内,涂覆量增加较快,超过20min后涂覆量增加缓慢。
TiO2-PTFE compound coating was prepared on the surface of TC4 titanium alloy by the special chemical and physical method.The lubricant film was composed of hard anodic oxidation film and PTFE with low friction factor,which had excellent self-lubricant property.Microstructure and morphology,phase composition and element composition of TiO2-PTFE compound coating were investigated.The effect of anodic oxidation treatment process and coating time on the coating volume of PTFE was discussed.Results of the experiment showed that after anodic oxidation,the nanometer TiO2 porous film was consisted of annatase and rutile phases formed on TC4 titanium alloy.After being coated with PTFE,the surface and film hole were covered by PTFE polymer.The PTFE coating volume kept stable after the samples of TC4 titanium alloy being treated in different voltages and different oxidation time.As the coating time prolonging,the PTFE coating volume increased rapidly in the first 5-20min,the coating volume increased slowly after more than 20min.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2010年第1期169-172,共4页
Journal of Functional Materials
基金
国家高技术研究发展计划(863计划)资助项目(2006AA06Z368)
辽宁省高校重点实验室基金资助项目(20061003)
