在石墨基体上制备耐磨的SiC镀层研究

Superhard and Wear Resistant SiC Coating Fabricated on Graphite Substrate

在工业冶炼碳化硅(SiC)过程中,在石墨基体上制备具有耐磨特性的SiC镀层。讨论了SiC镀层的形成过程,采用X射线衍射仪(XRD)分析了SiC镀层的物相结构,采用隧道扫描电镜(SEM)分析了镀层的表面形貌。并分析了SiC镀层的硬度和耐磨特性。结果表明:镀层为高温稳定型α-SiC,同时伴有Fe3Si和SiO2杂相出现,SiC镀层的表面硬度达到了1120HV,磨损机制为颗粒磨损,具有较好耐磨性能。

In industrial process of silicon carbide（SiC） smelting,the wear resistant SiC coating was fabricated on the graphite substrate.The formation of SiC coating was discussed.The phase structure and surface morphology were characterized by using x-ray diffractometer（XRD） and scanning electron microscope（SEM）.The hardness and wear resistance of SiC coating were analyzed.The results indicate that SiC coating is high temperature stable α-SiC,and the impurity phase of Fe3Si and SiO2 are also present.The surface hardness of SiC coating reaches 1120 HV.The wear mechanism is the particle wear and the SiC coating has excellent wear resistance.