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采用非平衡磁控溅射方法在AZ31镁合金表面沉积Mg-Cu-Y薄膜,以纯铜和Mg65 Cu25 Y10合金作为溅射靶材,选则Mg65 Cu25 Y10单靶、Mg65 Cu25 Y10靶和铜靶双靶两种方式分别进行溅射沉积.利用XRD、AFM、SEM分析了膜层结构与表面形貌,纳米压痕法、球盘式摩擦磨损测试研究了膜层的硬度和耐磨性.结果表明,Mg65 Cu25 Y10单靶溅射得到的薄膜为完全非晶态结构,而双靶共溅获得的膜层中出现含有铜的晶态组织.随着膜层中Cu含量的增加,纳米硬度较非晶态膜层有所降低,但同时耐磨性提高.两类不同结构薄膜相比较,Mg65 Cu25 Y10单靶溅射沉积的非晶膜层硬度最高,达到12GPa.用磨损量评价了基体与膜层的耐磨性,包含Cu结晶相的双靶共溅薄膜具有较好的耐磨性能.

参考文献

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