| 引用本文: | 杨志成，吴向清，谢发勤，姚小飞.纳米石墨改性ZM5镁合金微弧氧化陶瓷层摩擦磨损性能[J].中国表面工程,2013,26(2):45~50 |
| YANG Zhi-cheng, WU Xiang-qing, XIE Fa-qin, YAO Xiao-西北工业大学 航空学院， 西安 710072fei.Tribological Properties of MAO Coating with Nano-graphite on ZM5 Magnesium Alloy[J].China Surface Engineering,2013,26(2):45~50 |
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| 摘要: |
| 添加纳米石墨颗粒的硅酸盐溶液中制备ZM5合金微弧氧化陶瓷层，利用SEM、EDS和XRD分析了涂层的微观形貌、成分及物相组成，用球盘干磨损试验对涂层的室温摩擦磨损行为进行研究。结果表明，纳米石墨改性微弧氧化陶瓷层主要由Mg2SiO4、少量的MgO、Mg和C相组成，石墨以机械形式分散于陶瓷层中并起到减摩作用。4.9 N载荷下体积磨损率为9.19×10-5 mm3/Nm，是无石墨微弧氧化陶瓷层的1/3，ZM5基体的1/14；9.8 N载荷下体积磨损率为1.44×10-4 mm3/Nm，是无石墨微弧氧化陶瓷层的2/5，ZM5基体的1/8，与无石墨微弧氧化陶瓷层相比显著提高了镁合金基体的耐磨性，且其室温干摩擦磨损机理为疲劳磨损，磨痕呈疲劳剥落形貌。 |
| 关键词: ZM5合金 微弧氧化 纳米石墨 摩擦磨损性能 |
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| 基金项目:国家基础研究发展计划(973计划)(2007CB607603) |
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| Tribological Properties of MAO Coating with Nano-graphite on ZM5 Magnesium Alloy |
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YANG Zhi-cheng, WU Xiang-qing, XIE Fa-qin, YAO Xiao-西北工业大学 航空学院， 西安 710072fei
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School of Aeronautics, Northwestern Polytechnical University, Xi’an 710072
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| Abstract: |
| Micro-arc oxidation(MAO) ceramic coating of ZM5 alloy was prepared in the silicate electrolyte system with nano-graphite particle. The micro morphology, chemical and phase composition were investigated by SEM, EDS and XRD. At room temperature, the tribological properties of coatings were evaluated by a ball-on-disc wear test machine. The results show that the MAO ceramic coating with nano-graphite is composed by Mg2SiO4, MgO, Mg, and C. Graphite disperses in the coating through mechanical effect and shows antifriction effect. The volume friction rate of the MAO ceramic coating with nanographite is 9.19×10-5 mm3/Nm under the load of 4.9 N. It is onefourteenth of that of ZM5 substrate and onethird of that of MAO ceramic coating without graphite. The volume friction rate of the MAO ceramic coating with nano-graphite is 1.44×10-4 mm3/Nm under the load of 9.8 N. It is one-eighth of that of ZM5 substrate and two-fifth of that of the MAO ceramic coating without graphite. The wear resistance of ZM5 substrate increases dramatically because of the MAO ceramic coating with nano-graphite. The wear mechanism of the MAO ceramic coating with nanographite is fatigue wear from the fatigue spalling morphology. |
| Key words: ZM5 magnesium alloy micro-arc oxidation nano-graphite friction and wear property |
