(中國科學院金屬腐蝕與防護研究所金屬腐蝕與防護國家重點實驗室，沈陽 110015
俄羅斯科學院遠東分院化學研究所)
摘 要: 嘗試了通過微弧氧化陶瓷化處理來提高TiAl合金的抗高溫氧化性能。結果表明, 通過微弧氧化處理能在TiAl合金表面形成具有不同成分的陶瓷層, 但難以形成單一的Al2O3陶瓷層。在850 ℃的氧化實驗表明, 不同成分的陶瓷層對TiAl的抗氧化性能有不同的影響, 有些陶瓷層在氧化過程中剝落, 對TiAl的抗氧化性能無明顯改善; 另有一些陶瓷層與基體粘附性好, 在氧化過程不剝落, 能在一定程度上提高TiAl的抗氧化性能，但氧仍能通過陶瓷層向內擴散, 在陶瓷層底下形成以Al2O3為主的TiO2和AAl2O3的混合氧化物。
關鍵字: TiAl合金 高溫氧化 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
