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对Ti50Ni44Al6和Ti50Ni41Al6Nb3合金在1073 K循环氧化行为的测试表明,Nb的加入显著改善合金的高温抗氧化性能.Ti50Ni44Al6合金在1073 K经过100 h循环氧化后形成外层以TiO2为主并含有少量Al2NiO4、内层为TiNiO3的氧化层,合金的氧化动力学服从线性规律;Ti50Ni41Al6Nb3合金生成以TiO2为主的氧化膜,在外氧化层下面形成了一层富Nb和Al的复合氧化物,显著阻碍氧以及合金元素的扩散,降低了合金的氧化速率,合金高温氧化动力学遵从抛物线规律.

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