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在铝酸钠体系中,利用微弧氧化双脉冲电源在Ti-6Al-4V合金表面制备了以Al2TiO5为主晶相的陶瓷层。试样分别在1000℃下空气和氩气气氛中进行焙烧,通过XRD和SEM技术分析了相组成与表面形貌。结果表明,在空气中,焙烧使微弧氧化陶瓷层中的Al2TiO5相分解较快。在氩气中,陶瓷膜外层生成α-Al2O3,膜层从外至内Al2O3含量降低并有Ti2O3生成。氩气焙烧后陶瓷层表面颗粒较焙烧前均匀和细化。
In the sodium aluminate system, a ceramic layer with Al2TiO5 as the main crystalline phase was prepared on the surface of Ti-6Al-4V alloy by using micro-arc oxidation double pulse power. The samples were calcined at 1000 ℃ in air and argon atmosphere respectively. The phase composition and surface morphology were analyzed by XRD and SEM. The results show that in the air, the decomposition of Al2TiO5 phase in MAO layer is faster. In argon, the outer layer of ceramic film generates α-Al2O3, and the content of Al2O3 decreases from the outside to the inside of the film and Ti2O3 is formed. The surface of the ceramic layer after roasting in argon is even and refined before roasting.