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金属学报  2005 

热喷涂FeAl涂层中纳米晶结构的XRD分析

, PP. 1013-1019

Keywords: FeAl基涂层,热喷涂,纳米晶结构

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Abstract:

利用超音速火焰喷涂(HVOF)和大气等离子喷涂(APS)工艺分别喷涂了雾化(微米结构的)以及球磨(纳米结构的)Fe—Al粉末制备了不同结构的涂层。两种原料粉末和喷涂工艺均引起涂层的XRD峰异常宽化。由宽化峰给出的晶粒尺寸与TEM测出的晶粒尺寸有较大的差异。结合SEM、电子探针以及TEM的测试结果,同时考虑到涂层中形成的结构缺陷以及化学成分的不均匀性,证实异常宽化来自喷涂过程中由于Al的耗损导致的FeAl相中Al的成分不均匀分布。

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