Ferraris M, Verné E, Appendino P, Moisescu C, Krajewski A, Ravaglioli A, Piancastelli A
Department of Materials Science and Chemical Engineering, Polytechnic of Torino, Italy.
Biomaterials. 2000 Apr;21(8):765-73. doi: 10.1016/s0142-9612(99)00209-4.
In order to combine the mechanical properties of a high-strength inert ceramic (yttria-stabilised zirconia, ZrO2-3%Y2O3, defined as zirconia in the text) with the specific properties of bioactive materials, some zirconia samples were coated by two bioactive phosphosilicate glasses and glass-ceramics: RKKP and AP40. Coatings of about 200-300 microm thickness were prepared by a simple and low-cost firing method. They were characterised by optical and scanning electron microscopy (SEM) and compositional analysis (EDS). The adhesion of the coatings on zirconia was tested by shear tests. Vickers indentations at the coating/zirconia interface were performed in order to observe the crack propagation path. The reactivity of glasses and glass-ceramics coatings towards a simulated body fluid (SBF), having the same ion concentration as that of human plasma, was evaluated and compared to that of the bulk glass and glass-ceramics, by examining the morphology of the reaction layer formed on the surface of the coated zirconia after one month of soaking in the SBF at 37 degrees C.
为了将高强度惰性陶瓷（氧化钇稳定的氧化锆，ZrO₂ - 3%Y₂O₃，文中定义为氧化锆）的机械性能与生物活性材料的特定性能相结合，一些氧化锆样品被两种生物活性磷硅酸盐玻璃和微晶玻璃涂层：RKKP和AP40。通过一种简单且低成本的烧制方法制备了厚度约为200 - 300微米的涂层。通过光学显微镜、扫描电子显微镜（SEM）和成分分析（EDS）对其进行表征。通过剪切试验测试涂层与氧化锆的附着力。在涂层/氧化锆界面进行维氏压痕，以观察裂纹扩展路径。通过检查在37℃的模拟体液（SBF）中浸泡一个月后涂覆氧化锆表面形成的反应层的形态，评估并比较玻璃和微晶玻璃涂层对具有与人体血浆相同离子浓度的模拟体液（SBF）的反应性，并与块状玻璃和微晶玻璃的反应性进行比较。
