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材料工程  2014 

黏结相含量对超音速火焰喷涂TiB2-Ni涂层组织和性能的影响

DOI: 10.3969/j.issn.1001-4381.2014.03.006

Keywords: 超音速火焰喷涂,TiB2-Ni涂层,黏结相,腐蚀

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Abstract:

以机械合金化工艺制备的TiB2-40Ni和TiB2-50Ni粉末为原料,利用超音速火焰喷涂沉积不同TiB2-Ni涂层,采用扫描电镜、X射线衍射仪研究了涂层的组织和相结构,运用压痕法测定了涂层的显微硬度,通过水淬法测试涂层的抗热震性能,并研究涂层的耐熔融铝硅腐蚀性能。结果表明,TiB2-40Ni和TiB2-50Ni涂层致密,孔隙率分别为1.25%和0.12%;涂层的主要物相为TiB2和Ni;显微硬度值分别为(643.5±56.8)HV0.3与(597.9±36.1)HV0.3;涂层均具有较好的抗热震性能,其中以TiB2-50Ni涂层最佳;经过120h熔融铝硅腐蚀后发现,两种涂层均具有良好的抗熔融铝硅腐蚀性能,TiB2-50Ni涂层试样具有最好的耐腐蚀性能。

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