采用闭合场非平衡直流磁控溅射技术和阴极电弧离子镀技术在轴承钢表面分别制备了DLC和CrN薄膜,在全配方发动机油(CF-4,15W/40)润滑条件下,选择DLC/钢、CrN/钢摩擦配副,用SRV-Ⅳ摩擦实验机考察了25℃和100℃时DLC与CrN薄膜在不同载荷下的摩擦因数和磨损率,并对摩擦界面进行分析.结果表明:DLC和CrN薄膜在油润滑条件下的摩擦因数都随着载荷的增加而降低;DLC和CF-4构成的固液复合润滑体系具有更加优异的摩擦学性能;活性较高的CrN薄膜与发动机油中的添加剂相互作用,在摩擦界面上发生摩擦化学反应形成摩擦化学反应膜,并且薄膜表面形成的氧化层有利于提高薄膜在高温时的耐磨性.
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