激光表面合金化原位制备Ti-Cu纳米晶金属间化合物涂层  

In-situ Synthesized Ti-Cu Nanocrystalline Intermetallic Coating by Laser Surface Alloying

作　　者：张世堂[1] 郭纯[2] 周健松[3] 

机构地区：[1]中国人民解放军92117部队 [2]中国船舶重工集团公司第七二五研究所 [3]中国科学院兰州化学物理研究所

出　　处：《中国表面工程》2013年第5期59-63,共5页China Surface Engineering

基　　金：国家自然科学基金(20674063)

摘　　要：利用激光表面合金化技术以铜粉为初始原料，在纯钛表面通过激光表面合金化原位反应成功制备了Ti-Cu纳米晶金属间化合物涂层。采用X-射线衍射仪（XRD）和高分辨透射电镜（HRTEM）分析了涂层的组成和组织结构，测试了涂层在不同载荷下的摩擦磨损性能。结果表明：通过激光表面合金化制备的涂层主要成分为Ti和金属间化合物TiCu、TiCu3、Ti3Cu相。涂层含有纳米晶Ti-Cu金属间化合物，晶粒尺寸为10-500mm。Ti-Cu金属间化合物涂层的摩擦因数随载荷增加而减小，体积磨损率在10^-6～10^-6mm^3/Nm数量级范围并随载荷的增加而增大，与纯钛底材相比，Ti-Cu金属间化合物涂层具有良好的耐磨性。Titanium-copper nanocrystalline containing composite coating has been in-situ synthesized suc cessfully on the pure Ti substrate by laser surface alloying using Cu powder as the precursor. The composition and microstructure of the fabricated coating was analyzed by X-ray diffraction （XRD） and high resolution transmission electron microscopy （HRTEM）. The friction and wear properties of the coating were tested un der different loads. The results show that the prepared coating is mainly composed of Ti, TiCu, TiCua, Ti3Cu phases. The high resolution transmission electron microscopy results conform further the existence of Ti-Cu intermetallic compounds in the prepared coating. The magnified TEM images show that the laser surface allo ying coating contains Ti-Cu nanocrystalline and with the size of 10-500 nm. The Ti-Cu intermetallic coating presents excellent friction-reducing and anti-wear properties with the wear rate of 10^-5-10^-6 mm^3/Nm com pared with the pure Ti substrate.

关 键 词：激光表面合金化 纳米晶 钛-铜 

分 类 号：TG174.44[金属学及工艺—金属表面处理] TG115.58[金属学及工艺—金属学]