为改善钛合金和 HA 涂层的界面相容性,采用电泳法在钛合金表面预先沉积均匀的 HA 涂层,再于 1200 ℃ 下进行微波处理。 通过对涂层相结构的分析,证明在微波诱导作用下,形成了梯度结构的涂层。 梯度过渡层由 TiO₂ 和 TiO 组成的致密氧化层、CaTiO₃ 和微量 HA 组成,能够缓解 HA 涂层与钛合金热膨胀系数不匹配的问题,减少涂层开裂,提高涂层与基体的结合强度。

In order to improve the interface compatibility between titanium alloys and hydroxyapatite ( HA) coating, a uniform HA coating was fabricated by electrophoretic deposition firstly, then the coating was treated in microwave at 1200 ℃ .Through the analyzing the phase structure of the coating, it is proved that a gradient coating is obtained by microwave inducement . The gradient coating is composed of oxide layer with TiO₂and TiO, CaTiO₃and a minute amount of HA. Because the gradient structure can alleviate the mismatch of thermal expansion coefficient between HA and titanium alloys, less cracks and higher bonding strength can be obtained.