(中国科学院金属腐蚀与防护研究所金属腐蚀与防护国家重点实验室，沈阳 110015
俄罗斯科学院远东分院化学研究所)
摘 要: 尝试了通过微弧氧化陶瓷化处理来提高TiAl合金的抗高温氧化性能。结果表明, 通过微弧氧化处理能在TiAl合金表面形成具有不同成分的陶瓷层, 但难以形成单一的Al2O3陶瓷层。在850 ℃的氧化实验表明, 不同成分的陶瓷层对TiAl的抗氧化性能有不同的影响, 有些陶瓷层在氧化过程中剥落, 对TiAl的抗氧化性能无明显改善; 另有一些陶瓷层与基体粘附性好, 在氧化过程不剥落, 能在一定程度上提高TiAl的抗氧化性能，但氧仍能通过陶瓷层向内扩散, 在陶瓷层底下形成以Al2O3为主的TiO2和AAl2O3的混合氧化物。
关键字: TiAl合金 高温氧化 微弧氧化
（State Key Laboratory for Corrosion and Protection, Institute of Corrosion and Protection of Metals,
Chinese Academy of Sciences, Shenyang 110015, P. R. China
Institute of Chemistry, Far Eastern Branch, Russian Academy of Sciences, Russia）
Abstract:The surface ceramics treatment has been tried on TiAl alloy by means of Micro-Arc Oxidation (MAO) and their effect on oxidation resistance of TiAl alloy has been investigated. The results showed that ceramic coatings with different compositions can be obtained by different process. However, it seems very different to achieve a coating with only Al2O3. The oxidation test at 850 ℃ in air indicated that some ceramic coatings have very good adherence to the substrate, so they can effectively reduce the oxidation rate of TiAl, and in this situation, Al2O3 and TiO2 mixture formed between the ceramic coatings and TiAl alloy may be due to the inward diffusion of oxygen through ceramic coatings.
Key words: TiAl alloy; high temperature oxidation; micro-arc oxidation
