中文摘要：

利用浸涂法在TC4钛合金表面制备了高温防氧化玻璃-陶瓷涂层。采用金相观察（OM）、扫描电镜（SEM）、X射线衍射（XRD）、电子探针分析（EPMA）对其性能进行了表征。该涂料是以硅酸盐玻璃为主体，硅酸钠为粘结剂制备而成的料浆悬浮体。在500～1000℃的温度范围内，与没有涂层保护的基体相比，在涂层保护下基体的氧化程度至少可减轻85％。研究表明：随温度升高，涂层逐渐熔融，得到一层致密的保护层，涂层中依次出现Al2O3、TiO2、硅酸盐、钛铝、硅铝化合物等物相，使得涂层具有很好的高温流动性和稳定性，有效阻挡了氧气对基体的侵蚀，且涂层对基体的沾污甚微。涂层与基体的热膨胀系数（CTE）失配达到87％，涂层在使用后可以实现完全自剥落．

英文摘要：

A glass -ceramic coating used for oxidation -resistant at high temperature was prepared on TC4 titanium alloy by a slurry - dipping technique. The properties of as - obtained coating were characterized by OM, SEM, XRD and EPMA. The coating was a slurry suspension consisting of silicate glass powder and sodium silicate as binder. At temperature ranging from 500 ℃ to 1 000 ℃, the oxidation of the coated specimens could be reduced by at least 85% comparing with that of the bare specimens. The results demon- strated that the coating become a melted layer with the increase of the temperature forming a densed protective layer. Al2O3, TiO2, silicate, TiA1 and SiAl compounds appeared successively at the elevated temperature, which ensured good high temperature fluidity and stability of as - obtained coating, to protect alloy well against oxidation and only a tiny pollution to the alloy. The coating could be feeled off completely during cooling, considering 87% CTE mismatch between the coating and the titanium alloy.