激光熔敷Ti_5Si_3/NiTi_2复合材料涂层的组织与耐磨性  

MICROSTRUCTURE AND WEAR RESISTANCE OF LASER CLAD Ti_5Si_3/NiT_2 INTERMETALLIC WEAR RESISTANT COMPOSITE COATING

作　　者：刘元富[1] 赵海云[1,2] 王华明[1] 赵海云 

机构地区：[1]北京航空航天大学 [2]华中科技大学激光技术国家重点实验室

出　　处：《材料研究学报》2002年第3期313-318,共6页Chinese Journal of Materials Research

基　　金：国家自然科学基金资助项目50071004;航空基础科学基金资助项目00H51013.

摘　　要：以 Ti-Si-Ni合金粉末为原料,利用激光熔敷技术在BT9钛合金表面制备出了以金属间化合物Ti5Si3为增强相、以NiTi2为基体的Ti5Si3/NiTi2金属间化合物快速凝固耐磨复合材料涂层.Ti5Si3/NiTi2复合材料涂层的硬度高、组织均匀、致密、与基材之间为完全冶金结合,在干滑动磨损试验条件下具有很好的耐磨性.A wear resistant Ti5Si3/NiTi2 intermetallic composite coating was fabricated on sub-strate of a titanium alloy BT9 by laser cladding using the Ni-30Ti-10Si alloy powders. Microstructure of the coating was characterized using OM, SEM, XRD and EDS. Wear resistance of the coating was tested under dry sliding wear condition at the room temperature. The results show that the laser clad intermetallic composite coating has a rapidly solidified homogeneous microstructure consisting of Ti5Si3 primary particles uniformly distributed in the NiTi2 matrix and is metallurgically bonded to the titanium substrate. The laser clad Ti5Si3/NiTi2 intermetallic composite coating has high hardness and excellent wear resistance under dry sliding wear test conditions.

关 键 词：Ti5Si3/NiTi2复合材料 激光熔敷 金属间化合物 复合材料涂层 显微组织 钛合金 表面处理 

分 类 号：TG174.45[金属学及工艺—金属表面处理]