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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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Nb-Ti-Al高温Nb合金氧化行为的研究
, PP. 94-97
Keywords: 高温合金,β相,δ相,氧化
Abstract:
用真空电弧熔炼制备了β(Nb-35Ti-6A1)和β+δ(Nb-30Ti-15A1、Nb-15Ti-11Al)Nb台金，研究了3种Nb合金1000℃静止空气中的连续氧化行为，采用金相显微镜、XRD和SEM分析了氧化膜的结构和组成.研究表明，由Nb2O5，金红石TiO2和-A12O3组成的混合氧化膜具有一定的保护作用，3种Nb-Ti-Al合金氧化动力学曲线均遵循抛物线规律；Nb-35Ti-6Al中的富Ti偏析区发生内氧化，而Nb-30Ti-15Al和Nb-15Ti-11Al中δ相的存在有利于降低氧在基体中的溶解和扩散，使β+δ两相合金的氧化性能优于β单相合金.
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