K4104镍基高温合金表面Al及Al-Si渗层的微观组织研究
牛静,张立文,裴继斌,张凡云
摘要(Abstract):
分别采用料浆法和粉末包埋法在K4104镍基高温合金上制备Al-Si和Al渗层。借助X射线衍射(XRD)和电子探针(EPMA),详细分析Al-Si、Al渗层的微观组织,探讨渗层形成机理,并且对比研究Al-Si共渗层和单渗Al层的微观结构,找出Si对渗Al层组织结构的影响。结果表明:Al-Si共渗渗层中包含CrxSiy化合物、富Al的β、富Ni的β、Cr的碳化物和γ′相,单渗Al层则包含富Al的β、富Ni的β、Cr的碳化物和γ′相;Si的加入使Al-Si共渗层出现过渡层,过渡层导致Al元素含量由外向内的减少趋势较单渗Al的平缓。
关键词(KeyWords): 镍基高温合金;Al-Si共渗;单渗Al;微观组织
基金项目(Foundation):
作者(Author): 牛静,张立文,裴继斌,张凡云
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