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Si对TiAl合金高温抗氧化性能的影响

肖伟豪 张亮 姜惠仁

肖伟豪, 张亮, 姜惠仁等 . Si对TiAl合金高温抗氧化性能的影响[J]. 北京航空航天大学学报, 2006, 32(03): 365-368.
引用本文: 肖伟豪, 张亮, 姜惠仁等 . Si对TiAl合金高温抗氧化性能的影响[J]. 北京航空航天大学学报, 2006, 32(03): 365-368.
Xiao Weihao, Zhang Liang, Jiang Huirenet al. Effects of Si on high temperature oxidation resistance of TiAl alloy[J]. Journal of Beijing University of Aeronautics and Astronautics, 2006, 32(03): 365-368. (in Chinese)
Citation: Xiao Weihao, Zhang Liang, Jiang Huirenet al. Effects of Si on high temperature oxidation resistance of TiAl alloy[J]. Journal of Beijing University of Aeronautics and Astronautics, 2006, 32(03): 365-368. (in Chinese)

Si对TiAl合金高温抗氧化性能的影响

详细信息
    作者简介:

    肖伟豪(1980-),男,湖南娄底人,硕士生, micheal5417@126.com.

  • 中图分类号: TG 146.2

Effects of Si on high temperature oxidation resistance of TiAl alloy

  • 摘要: 利用X射线衍射、扫描电镜、能谱仪等手段研究了TiAl-Si(原子数分数为0~20%)合金在1 173 K大气中24 h的恒温氧化.结果表明:Si元素可以有效地提高TiAl合金的高温抗氧化性能;随着Si含量的增加,氧化膜厚度依次减薄,TiO2的含量逐渐减少,Al2O3的含量逐渐增加,添加到10%左右时就有连续致密的Al2O3保护膜形成;Si在0~20%的添加过程中并没发现Si的氧化物生成.分析表明:Si对抗氧化性能的贡献可归结于Si与Ti有很好的亲和力,可以有效地降低Ti离子的活度、阻碍Ti离子的向外扩散, 相对来说增强了Al离子的活度,促进连续致密的Al2O3保护膜生成.

     

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出版历程
  • 收稿日期:  2005-06-24
  • 网络出版日期:  2006-03-31

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