基于电化学氧化处理提高TiAl合金抗高温氧化性能研究进展

Research progress on improving high temperature oxidation resistance of TiAl alloy based on electrochemical oxidation

TiAl合金具有密度低、比强度高、蠕变性能好等特点,在航空航天、汽车工业等领域具有广阔的应用前景。然而,抗高温氧化性能不足限制了其广泛应用。本文简要介绍了TiAl合金的高温氧化行为和常用防护措施。重点讨论了电化学氧化处理在合金表面改性上的应用、改性膜层形成机理和防护机制。展望了通过电化学氧化提高Ti Al合金抗高温氧化性能的发展趋势。

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.