Ti/γ-TiAl/FHA生物复合涂层的制备  

Preparation of Ti/γ-TiAl/FHA Coatings for Biologic Application

作　　者：张玲[1] 王芬[1] 武秀兰[1] 

机构地区：[1]陕西科技大学材料科学与工程学院,陕西咸阳712081

出　　处：《稀有金属材料与工程》2007年第A02期43-46,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金项目(50372037和50432010)资助

摘　　要：采用Al粉为主要原料,利用涂敷真空烧结法在Ti基体表面制备γ-TiAl金属间化合物过渡层;之后以Ca(NO_3)2·4H_2O-P_2O_5-NH_4F-乙醇体系,采用溶胶-凝胶法在Ti/γ-TiAl表面制备FHA生物涂层。借助XRD、SEM和EDS对涂层的结构和组成进行表征,并分别采用TLD电子拉力试验机和ICP-AES研究了涂层的结合强度和在模拟生理体液中的生物性能和耐腐蚀性。结果表明:结合涂敷真空烧结和溶胶-凝胶法可以获得预期结构的Ti/γ-TiAl/FHA复合涂层:γ-TiAl过渡层的引入可使复合涂层的结合强度达32 MPa,并且可以大大降低复合材料在模拟生理体液中的离子溶出;此外,Ti/γ-TiAl/FHA复合涂层结构的合理设计在诱导Ca^(2+)、PO_4^(3-)沉积形成HA和保持涂层生物活性的同时,有效降低了涂层本身的溶解度。γ-TiAl intermetallic buffer layer was prepared by sintering in vacuum furnace using Al powder as main raw material. Then FHA biocoating was prepared on Ti/γ-TiAl surface by sol-gel method with Ca（NO3）2.4H2O-P2O5-NH4F-alcohol system. The structure and constitution were characterized by XRD, SEM and EDS. The bonding strength was tested and bioperformance and corrosion resistance were investigated by ICP-AES according to the change of [Ca^2＋] and metal ions releasing from substrates in SBF. Results showed that Ti/γ-TiAl/FHA with anticipated structure could be obtained by sol-gel and sintering methods by dip coating. The introduction of γ-TiAl buffer layer could improve the bonding strength of FHA external coating to 32MPa and decrease the release of metal ions. Besides, the proper design of Ti/γ-TiAl/FHA effectively decreased the solubility of coating while inducing the deposition of Ca^2＋ and PO4^3- to form HA and keeping the bioactivity.

关 键 词：钛 Γ-TIAL 金属间化合物 含氟羟基磷灰石 涂层 

分 类 号：TG174.4[金属学及工艺—金属表面处理]