医用镁合金激光熔覆羟基磷灰石涂层初探  

Laser Cladding Hydroxypatite Coating on Magnesium Alloy for Biomaterials Application

作　　者：高亚丽[1] 熊党生[1] 王存山[2] 潘学民[2] 

机构地区：[1]南京理工大学材料科学与工程系,210094 [2]大连理工大学三束材料改性实验室

出　　处：《特种铸造及有色合金》2009年第4期305-307,共3页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金重点资助项目(50601013,50704009);中国博士后科学基金资助项目(20070421011);江苏省博士后科学基金资助项目(0702029B)

摘　　要：为改善医用镁合金表面耐蚀性和生物相容性,采用激光熔覆技术在AZ91D镁合金表面制备具有生物活性的羟基磷灰石涂层。结果表明,所制备的涂层和镁合金基体达到了良好的冶金结合,涂层显微结构为致密的胞状晶,主要由Mg、HA、CaH2P2O7和CaH4(PO3)2.H2O组成,其中Ca和P的摩尔比为1.73,接近理论值1.67,从而大大提高了涂层的生物活性。另外,控制Mg对涂层的稀释对涂层制备起关键作用。In order to improve the corrosion resistance and biocompatibility of the magnesium alloy for biomaterials application, hydroxypatite coating with the biology activity on AZ91D Mg alloy was prepared by laser cladding method. The results show that prepared coating exhibits desirable bonding with magnesium alloy substrate, and microstructure of the exhibits is the compact cellar grain, and it is composed of Mg, HA, CaH2P2O7 and CaH4(PO3)2H2O, in which atomic ratio of Ca via P is 1.73, closing to theoretical value of 1.67, so the biological activity of the coating exhibits improved significantly. In addition, controlling dilution of magnesium plays a key role in the preparation of the coating.

关 键 词：医用镁合金 激光熔覆 羟基磷灰石 生物相容性 

分 类 号：TG174.44[金属学及工艺—金属表面处理]