Kasuga T, Mizuno T, Watanabe M, Nogami M, Niinomi M
Department of Materials Science and Engineering, Nagoya Institute of Technology, Japan.
Biomaterials. 2001 Mar;22(6):577-82. doi: 10.1016/s0142-9612(00)00216-7.
A glass-ceramic layer containing beta-Ca3(PO4)2 crystals could be joined easily with a new type of titanium alloy (Ti-29Nb-13Ta-4.6Zr) consisting of a beta-titanium phase by heating the metal, on which glass powders with a composition of 60CaO x 30P2O5 7Na2O x 3TiO2 were placed, at 800 degrees C in air. Measurement of tensile bonding strength revealed that the joining between the coating layer and the substrate is very strong. Even after the large deformation (e.g., approximately 90 degrees in bending angle) of the titanium alloy, the coating layer was not peeled off from the substrate. A compositionally gradient layer in the TiO2-P2O5-Na2O-CaO system is developed automatically on the titanium alloy during the heating, resulting in the formation of the strong joining. By soaking in simulated body fluid at 37 degrees C, hydroxyapatite phase was formed newly on the surface of the coating layer.
通过在空气中于800℃加热放置有组成为60CaO·30P₂O₅·7Na₂O·3TiO₂的玻璃粉末的金属，含有β -Ca₃(PO₄)₂晶体的玻璃陶瓷层能够容易地与由β钛相组成的新型钛合金（Ti-29Nb-13Ta-4.6Zr）结合。拉伸结合强度的测量表明涂层与基体之间的结合非常牢固。即使钛合金发生了大变形（例如弯曲角度约为90度），涂层也没有从基体上剥落。在加热过程中，TiO₂-P₂O₅-Na₂O-CaO体系中会自动在钛合金上形成成分梯度层，从而形成牢固的结合。通过在37℃的模拟体液中浸泡，在涂层表面新形成了羟基磷灰石相。
