Interfaces in graded coatings on titanium-based implants.
Interfaces in graded coatings on titanium-based implants.
复制标题
钛基植入物上梯度涂层的界面。
DOI：
10.1002/jbm.a.31935
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
Tomsia,AP
中科院分区：
文献类型：
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作者：
Lopez-Esteban,S;Gutierrez-Gonzalez,CF;Gremillard,L;Saiz,E;Tomsia,AP
采用搪玻璃技术在Ti6 Al 4V基体上制备了梯度双层玻璃陶瓷复合涂层。这些层由CaO-MgO-Na 2 O-K2 O-P2 O 5系统中的玻璃与不同量的磷酸钙（CP）的混合物组成。已经确定了用于制造对金属具有良好附着力的涂层的最佳烧制条件，同时避免玻璃和陶瓷颗粒之间的有害反应。最终涂层不会开裂或分层。与合金接触的高二氧化硅层（>60 wt % SiO2）的使用促进了涂层的长期稳定性;通过形成纳米结构的Ti 5Si 3层实现了玻璃-金属粘合。含有低硅玻璃（SiO2重量百分比为1.53%）和合成羟基磷灰石颗粒的混合物的表面层在体外试验期间促进新磷灰石的沉淀。涂层在模拟体液中的体外行为取决于玻璃基体和CP颗粒的组成，并受到涂层设计和烧制条件的强烈影响。© 2008 Wiley Periodicals，Inc.生物医学材料研究杂志，2009年
Graded bilayered glass–ceramic composite coatings on Ti6Al4V substrates were fabricated using an enameling technique. The layers consisted of a mixture of glasses in the CaO‐MgO‐Na2O‐K2O‐P2O5system with different amounts of calcium phosphates (CPs). Optimum firing conditions have been determined for the fabrication of coatings having good adhesion to the metal, while avoiding deleterious reactions between the glass and the ceramic particles. The final coatings do not crack or delaminate. The use of high‐silica layers (>60 wt % SiO2) in contact with the alloy promotes long‐term stability of the coating; glass–metal adhesion is achieved through the formation of a nanostructured Ti5Si3layer. A surface layer containing a mixture of a low‐silica glass (∼53 wt % SiO2) and synthetic hydroxyapatite particles promotes the precipitation of new apatite during testsin vitro. Thein vitrobehavior of the coatings in simulated body fluid depends both on the composition of the glass matrix and the CP particles, and is strongly affected by the coating design and the firing conditions. © 2008 Wiley Periodicals, Inc. J Biomed Mater Res, 2009