βγ-TiAl合金具有良好的高温变形能力,为TiAl合金的发展开辟了新的途径.成功制备了不同x=V/Nb(x=1,5,2,3.5)的βγ-TiAl Ti-45Al-9(V,Nb,Y)合金,研究了上述合金在800 ℃静止空气中的氧化行为.结果表明:当x=1时,Ti-45Al-9(V,Nb,Y)合金中形成条带状、连续致密的 Al2O3氧化层,显著提高了合金的抗氧化能力.随着x=V/Nb的增加,Al2O3氧化层厚度变薄,合金的抗氧化能力下降.
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