研究了磁控溅射的Ti-48Al-8Cr-2Ag(原子数分数,%)纳米晶涂层对Ti-46.5Al-5Nb合金腐蚀行为的影响.结果表明,在600～700℃盐水蒸气的协同作用下,TiAlCrAg涂层使TiAlNb合金腐蚀速率降低.Nb是TiAlNb合金在700℃盐水蒸气协同作用下生成致密TiO2膜的主要原因.氯化物侵蚀α2相,使TiAlNb合金在盐和水蒸气综合作用下加速腐蚀,TiAlCrAg涂层中较少的α2相以及Laves相中较高的Cr含量是腐蚀速率降低的主要原因.
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