采用电弧离子镀技术,在45钢基体上制备了不同氮气含量的CrNx薄膜.采用X射线衍射技术(XRD)、扫描电子显微镜(SEM)、努氏硬度计和UMT型球-盘摩擦试验机,分别测试了薄膜相结构、表面形貌、显微硬度和摩擦磨损性能.结果表明:CrNx薄膜主要由CrN和Cr2N相组成;随着N2含量的增加,薄膜中Cr2N(211)衍射峰强度逐渐减弱,CrN(220)衍射峰强度逐渐增强;薄膜表面颗粒逐渐减少,表面趋于平整,薄膜硬度出现两个峰值,对应于薄膜为单相Cr2N和CrN的相组成处;与钢基体相比,氮气含量为35%时,CrNx薄膜具有良好的表面质量、最佳的硬度、优良的耐磨损性能.
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