(中山大學(xué) 材料學(xué)院，深圳 518107)
摘 要: TiAl合金具有密度低、比強(qiáng)度高、蠕變性能好等特點(diǎn)，在航空航天、汽車(chē)工業(yè)等領(lǐng)域具有廣闊的應(yīng)用前景。然而，抗高溫氧化性能不足限制了其廣泛應(yīng)用。本文簡(jiǎn)要介紹了TiAl合金的高溫氧化行為和常用防護(hù)措施。重點(diǎn)討論了電化學(xué)氧化處理在合金表面改性上的應(yīng)用、改性膜層形成機(jī)理和防護(hù)機(jī)制。展望了通過(guò)電化學(xué)氧化提高TiAl合金抗高溫氧化性能的發(fā)展趨勢(shì)。
關(guān)鍵字: TiAl合金；抗高溫氧化；電化學(xué)氧化；鹵素效應(yīng)
（School of Materials, Sun Yat-sen University, Shenzhen 518107, China）
Abstract:TiAl alloy has the characteristics of low density, high specific strength and good creep properties, so it has a broad application prospect in aerospace, automotive industry and other fields. However, the lack of high temperature oxidation resistance limits their wide range of practical applications. The purpose of this review is to describe the research progress and mechanism of electrochemical oxidation, which is the surface modification method of oxidation protection of TiAl alloy, but it is not a general review of oxidation protection of TiAl alloy. The high temperature oxidation behavior and common protective measures of TiAl alloy are briefly introduced. The preparation method, formation process and protection mechanism of electrochemical oxidation coating are discussed in detail. Finally, the development trend of improving the high temperature oxidation resistance of TiAl alloy by electrochemical oxidation is prospected.
Key words: TiAl alloy; high temperature oxidation resistance; electrochemical oxidation; halogen effect
