TC4合金表面激光原位合成Ti/TiC生物涂层的组织结构及性能  

Microstructure and Performance of Ti/TiC Composite Biocoating Prepared on TC4 Alloy via In-Situ Laser Synthesis

作　　者：张政[1,2] 王爱华[1] 夏海斌[3] 宁颖圆[3] 

机构地区：[1]华中科技大学材料成形与模具技术国家重点实验室,湖北武汉430074 [2]福建省锅炉压力容器检验研究院,福建福州350000 [3]武汉大学口腔生物医学教育部重点实验室,湖北武汉430079

出　　处：《材料保护》2011年第7期4-7,3,共4页Materials Protection

基　　金：中央高校基本科研业务费专项资金(3081019)资助

摘　　要：为了提高医用TC4合金的耐磨性能,在其表面预置石墨粉,激光原位合成了Ti/TiC复合涂层,并分析了涂层的组织结构、显微硬度、耐磨性、耐蚀性及生物相容性。结果表明:涂层无气孔、裂纹等缺陷,组织为树枝晶状,显微硬度和耐磨性能较基材分别提高1倍和4.35倍,且耐蚀性及生物相容性较喷砂处理的医用TC4合金基材明显提高。Ti/TiC composite bioccating was prepared on TC4 alloy with pre-placed graphite powder layer via in-situ laser synthesis so as to improve the wear resistance of the Ti alloy.The microstructure,micro-hardness,wear resistance,corrosion resistance and biocompatibility of assynthesized Ti/TiC compesite biocoating were evaluated.Results show that as-synthesized Ti/TiC composite biocoating is free of pores and cracks,and mainly consists of dendrites,possessing much higher micro-hardness and wear resistance than Ti alloy substrate.In the meantime,as-synthesized Ti/TiC composite biocoating possesses much better corrosion resistance and biocompatibility than the TC4 alloy substrate subjected to sand blasting.

关 键 词：激光原位合成 TC4合金 Ti/TiC涂层 组织结构 显微硬度 耐磨性 耐蚀性 生物相容性 

分 类 号：TG174.44[金属学及工艺—金属表面处理]