摘要
在1Cr18Ni9Ti型不锈钢基体表面,采用等离子喷涂技术制备Fe-Ni-B(Fe70Ni27B3,wt%)屏蔽涂层。采用X射线衍射(XRD)、扫描电子显微镜(SEM)及能谱仪(EDX)对涂层的微观结构、物相组成及元素分布进行了研究,并对涂层的屏蔽效果进行了测试。结果表明,Fe-Ni-B屏蔽涂层呈均匀的层片状累积结构,具有屏蔽功能的含硼相主要为Fe2B,另外还含有(Fe,Ni)相和少量的Fe7B相。从Fe-Ni-B涂层表面到基体方向,硬度较大的硼化物浓度逐渐降低,相应的硬度也随之减小。Fe-Ni-B涂层能明显提高不锈钢基材的热中子吸收率。
Fe-Ni-B（Fe70Ni27B3,wt%）shielding coatings were deposited on 1Cr18Ni9Ti stainless steel substrate by plasma spraying process.Microstructure, phases and elements distribution of the Fe-Ni-B coating was investigated by means of X-rays diffraction,scanning electron microscopy and energy dispersive X-ray detector.The results show that the Fe-Ni-B coatings exhibit evenly laminated microstructure.The primary phase with shielding effectiveness in Fe-Ni-B coating is Fe2B,and（Fe,Ni） phase and a spot of Fe7B are also observed in the coatings. From surface to substrate of the Fe-Ni-B coatings, density of Fe2 B phase decreases gradually, and Vickers hardness values decline from the coating surface to substrate due to the dispersion strengthening effect of Fe2 B. The shielding effectiveness measurement indicates the Fe-Ni-B coating is able to improve the thermal neutron absorption ratio of the stainless steel substrate.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2009年第4期151-155,共5页
Transactions of Materials and Heat Treatment
