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钛合金是航空航天工业常用的结构材料，它具有重量轻、强度高、抗腐蚀强等优良性能，但耐磨性较差．为提高其耐磨性，对ＴＣ４、ＴＡ７航材试件，采用溅射方法在其表面镀上钛膜，并用（Ｎ＋Ｎ＋２）混合离子束进行动态反冲注入及单元素Ｃ＋离子束注入两种方法，进行表面改性．精密摩擦、磨损试验及显微硬度测量结果，试件表面的滑动摩擦系数降低了６４％～７７％；磨损率减少了２２％～４８％；显微硬度提高０．３～１．４倍．证明离子注入有效地改善了合金表层的摩擦、磨损性能．对注入样品进行Ｘ射线光电子能谱（ＸＰＳ）分析，发现注入后的钛合金表层，生成了大量的ＴｉＯ２，并析出ＴｉＮ、ＴｉＣ等金属化合物，这是降低摩擦系数，提高耐磨性的主要因素．添加Ｃ＋离子注入的试件，其力学性能并无进一步改善，原因有待分析．
Titanium alloy is a commonly used structural material in the aerospace industry. It has the advantages of light weight, high strength and strong corrosion resistance, but its wear resistance is poor. In order to improve their wear resistance, TC4 and TA7 materials were coated with titanium film on the surface by sputtering method and dynamic recoil injection and single element C + ion beam implantation by (N + N + 2) mixed ion beam , Surface modification. The results of the precision friction, wear test and microhardness measurement show that the sliding friction coefficient of the specimen surface is reduced by 64% -77%, the wear rate is reduced by 22% -48% and the microhardness is increased by 0.3-1.4 times. It is proved that ion implantation can effectively improve the friction and wear properties of the alloy surface. X-ray photoelectron spectroscopy (XPS) analysis of the implanted samples revealed that a large amount of TiO2 was formed and TiN, TiC and other metal compounds were precipitated on the surface of the injected titanium alloy, which was the main factor for reducing the friction coefficient and improving the wear resistance . Adding C + ions into the specimen, its mechanical properties and no further improvement, the reasons remain to be analyzed.