火焰喷涂制备Ni基非晶涂层及其性能研究

来源 :第十一届全国表面工程大会暨第八届全国青年表面工程学术会议 | 被引量 : 0次 | 上传用户:houguangyun1981
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  高成本的非晶粉末是制约非晶涂层工程化应用的重要因素,利用高速火焰喷涂自制的Ni基合金粉末,尝试制备了高非晶含量的Ni基非晶涂层.利用X射线衍射仪、扫描电镜和投射电镜分别分析了粉末和涂层的相组织结构、表面形貌和微观特征.结果 表明,Ni基合金粉末球形度较好,表面比较光滑,主要有(Ni,Fe,Mo)23B6晶体相组成.相比Ni基合金粉末,经过火焰喷涂制备的Ni涂层,组织结构致密,与基体结合良好,衍射峰明显发生了宽化,说明有非晶相的生成,非晶含量达70%左右.在干摩擦条件下,涂层的摩擦系数为0.35左右,相对耐磨性是45钢的3倍.
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