吴玉萍,林萍华,王泽华,谢国治,张萍

• 1:河海大学材料系
• 2:河海大学材料系
• 3:河海大学材料系
• 4:河海大学材料系

摘要(Abstract)：

采用多元Fe基合金(含Cr、Si、Mn、B等)作为喷涂粉末,用超音速火焰(HVOF)喷涂法在不锈钢基体上制备厚度约200μm的Fe-Cr基涂层。用X射线衍射、扫描电镜、透射电镜、差示扫描量热仪(DSC)对涂层的组织结构特征进行了研究。涂层由于熔融和半熔化状态的液滴的连续堆积而成层状,由Fe基非晶、纳米晶及硼化物组成,纳米晶尺寸约为10-30nm。DSC分析表明非晶的晶化温度约为605℃。非晶的形成是由于喷涂液滴快的冷却速度及合适的粉末成分;非晶由于后续熔融液滴的堆积对前涂层产生退火效应,以非均匀形核的方式分别在非晶内部和非晶与硼化物的界面形成。

关键词(KeyWords)： Fe-Cr基合金;非晶/纳米晶;热力学;HVOF喷涂

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 吴玉萍,林萍华,王泽华,谢国治,张萍

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