Ni/h-BN复合粉末及其涂层的制备与表征

Preparation and Characterization of Nickel Clad h-BN Composite Powders and Coating

采用水热氢还原法制备了用于可磨耗涂层的镍包六方氮化硼(Ni/h-BN)复合粉末,并使用等离子喷涂制备了相应的涂层。采用金相显微镜、扫描电镜及X射线衍射等分析测试手段,对所制备的粉末及涂层的微观结构、形貌及相组成进行了分析表征。结果表明,通过h-BN的预处理活化的过程,可以使镍在其表面制备均匀完整的包覆,所制备的涂层孔隙率约为26%。

Nickel clad hexagonal boron nitride （h-BN） powders were prepared by reducing nickel ions from a solution under hydrogen pressure and using plasma spraying an obradable coating layer was performed. The microstructure, morphology and phase composition of the powders and the coating layer were characterized by optical microscope （OM）, scanning electronic microscope （ SEM ） and X-ray diffraction （XRD）, respectively. The results showed that alkali solution pretreatment and activation procession are necessary for acquiring a dense and uniform nickel coating on the surface of h-BN particles, and the porosity of the coating was about 26%.