预置TiCuZnSn的钛表面搅拌摩擦改性层组织与摩擦磨损性能
Microstructure and friction and wear properties of titanium modified layer of preset TiCuZnSn by FSP
党杰 1李杰 2周鹏 1史洪源 1惠媛媛1
作者信息
- 1. 西安航空职业技术学院,陕西 西安 710089
- 2. 西安航空职业技术学院,陕西 西安 710089;西安理工大学材料科学与工程学院,陕西 西安 710048
- 折叠
摘要
为了获得表面综合性能良好的生物医用钛金属,在TA2纯钛表面预置等物质的量的Ti、Cu、Zn、Sn金属粉末,采用搅拌摩擦加工技术对纯钛进行表面改性.通过扫描电镜、能谱仪、电子背散射衍射对钛表面改性层微观组织进行观察和分析,利用纳米压痕、摩擦磨损试验测试改性层机械性能.结果表明:搅拌摩擦加工技术可获得内部无缺陷、与TA2纯钛基体结合良好的表面改性TiCuZnSn合金层,改性层最大深度约 2.5 mm;合金元素Cu、Zn、Sn提高了改性层的杨氏模量和硬度,特别是对改性层硬度的提升效果更显著;TiCuZnSn改性层对TA2钛摩擦系数的影响不显著,但改性层的平均磨损率会大幅降低,与TA2钛相比,TiCuZnSn表面改性层平均磨损率降低约28.95%.
Abstract
In order to obtain the biomedical titanium metal with good surface comprehensive properties,the equimolar Ti,Cu,Zn and Sn metal powders were preset on the surface of TA2 pure titanium,and the surface of pure titanium was modified by friction stir processing(FSP).The microstructure of the modified layer was observed and analyzed by scanning electron microscopy,energy dispersive spectro-meter and electron back scattering diffraction,and the mechanical properties of the modified layer were tested by nano-indentation and friction and wear tests.The results show that the TiCuZnSn modified layer with no internal defects and good combination with titanium matrix could be obtained by FSP,and the maximum depth of the modified layer is about 2.5 mm.Alloying elements Cu,Zn and Sn could im-prove the Young's modulus and hardness of the modified layer,especially the hardness of the modified layer.The TiCuZnSn modified layer has no significant effect on the friction coefficient of TA2 titanium,but the average wear rate of the modified layer is significantly reduced.Compared with TA2 titanium,the average wear rate of the surface modified layer is reduced by about 28.95%.
关键词
钛/表面改性/TiCuZnSn合金层/搅拌摩擦加工/摩擦磨损Key words
titanium/surface modification/TiCuZnSn alloy layer/friction stir processing/friction and wear引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据