Ti6Al4V钛合金表面不同气压离子镀纯Mg薄膜的性能

为了进一步提高人体植入材料Ti6Al4V钛合金的生物功能,采用多弧离子在其表面沉积纯Mg薄膜。采用现代表面分析技术研究了不同气压下沉积的纯Mg薄膜的组织结构和降解特性。结果表明:当气压为10-3Pa时,Ti6Al4V钛合金表面覆盖有粒径为1～3μm的Mg颗粒且具备优异的结晶性能,纯Mg薄膜在Hank’s人体模拟液中浸泡1 d时,浸泡液的p H值从7.5快速升高至10.0,略小于纯Mg块体之p H值,之后p H值有一定程度的减小;在100Pa压力下沉积纯Mg薄膜时浸泡液的pH值降低速度比10-3Pa下时的慢,10-3Pa沉积的纯Mg薄膜浸泡液的p H值降低速度最快,具备更优的耐蚀性能; Mg2+的释放速率属于先快速后缓慢的变化过程。

Ti-Al-N薄膜的性能及应用

利用多弧离子沉积技术在 W18Cr4V高速钢表面沉积 (Ti,Al) N薄膜 ,实验结果表明 (Ti,Al) N薄膜的硬度和抗氧化性能明显优于 Ti N薄膜 ,(Ti,Al) N膜层刀具的寿命大大高于 Ti

Structure and wear resistance of TiN and TiAlN coatings on AZ91 alloy deposited by multi-arc ion plating

In order to investigate the microstructure of TiN and TiAlN coatings and their effect on the wear resistance of Mg alloy, TiN and TiAlN coatings were deposited on AZ91 magnesium alloy by multi-arc ion plating technology.TiN and Ti70Al30N coatings were prepared on the substrate,respectively,which exhibited dark golden color and compact microstructure.The microstructures of TiN and Ti70Al30N coatings were investigated by X-ray diffractometry(XRD)and scanning electron microscopy(SEM).The micro-hardness and wear resistance of TiN and Ti70Al30N coatings were investigated in comparison with the uncoated AZ91 alloy. The XRD peaks assigned to TiN and TiAlN phases are found.The hardness of TiN coatings is two times as high as that of AZ91 alloy, and Ti70Al30N coating exhibits the highest hardness.The wear resistance of the hard coatings increases obviously as result of their high hardness.