HAP-玻璃-α-Al_2O_3复合梯度生物陶瓷涂层的显微结构及其附着强度  

Microstructure and Adhesion of HAP-Glass-Alumina Composite Gradient Bioceramics Coating

作　　者：王志强[1] 陈晓旭[2] 蔡英骥[3] 吕秉玲[1] 

机构地区：[1]大连理工大学化工学院,大连116012 [2]大连市中心医院神经外科,大连116033 [3]大连轻工业学院材料科学与工程系,大连116034

出　　处：《生物医学工程学杂志》2005年第1期70-73,共4页Journal of Biomedical Engineering

基　　金：辽宁省教育厅高等学校科学研究计划项目(B类;20061193;A类202073416);辽宁省科技厅自然科学基金资助项目(20032107)

摘　　要：利用涂覆烧结法在 α- Al2 O3陶瓷基体表面制备了 HAP-玻璃 (α- Al2 O3)梯度生物活性涂层 ,并研究了涂层组成对显微结构和附着强度的影响。梯度涂层中玻璃组成采用低膨胀低软化温度的 R2 O- Al2 O3- B2 O3- Si O2 系统 ;涂层中的 HAP含量由里到外逐渐增多 ,并在涂层中添加了适量的超细 α- Al2 O3粉体。实验结果表明 ,使用 R2 O-Al2 O3- B2 O3- Si O2 系统玻璃有利于涂层低温烧结和涂层与基体结合 ,在涂层中添加 α- Al2 O3超细粉有利于提高涂层与基体结合强度 ,所制备的梯度涂层与基体的结合强度为 4 8.2 MPa。HAP-Glass-α-Al2O3 gradient coating on alumina ceramics substrate was prepared by multi-layer slurry-dipping and sintering process, effects of the composition of the coating on the microstructure and adhesion strength of the gradient coating were studied. R2O-Al2O3-B2O3-SiO2 system glass with low softening temperature and thermal expansion was used in the gradient coating. The composition of the coating was varied from interface to surface layer, i.e. the HAP concentration increased and glass concentration decreased gradually from the under layer to the surface layer. A suitable amount superfine α-Al2O3 was added in the gradient coating to reinforce the bonding strength between the coating and substrate. The results show that the use of R2O-Al2O3-B2O3-SiO2 system glass is propitious to sintering the coating at low temperature and to combination between the coating and substrate. The addition of superfine α-Al2O3 can reinforce the bonding strength between the coating and substrate, the highest bonding strength is about 48.2 MPa.

关 键 词：HAP-玻璃-α—Al2O3 复合梯度生物陶瓷涂层 显微结构 附着强度 羟基磷灰石 生物材料 

分 类 号：R318.08[医药卫生—生物医学工程]