崔叶,蔡振兵,刘新龙,李正阳,朱旻昊.氧化时间对微弧氧化膜电接触微动磨损行为的影响[J].表面技术,2018,47(6):188-194.
CUI Ye,CAI Zhen-bing,LIU Xin-long,LI Zheng-yang,ZHU Min-hao.Effects of Oxidation Time on Electrical Contact Fretting Wear Behavior of MAO (Micro-arc Oxidation) Coating[J].Surface Technology,2018,47(6):188-194 |
| 氧化时间对微弧氧化膜电接触微动磨损行为的影响 |
| Effects of Oxidation Time on Electrical Contact Fretting Wear Behavior of MAO (Micro-arc Oxidation) Coating |
| 投稿时间：2018-03-22 修订日期：2018-06-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2018.06.027 |
| 中文关键词: 微弧氧化 铝合金 微动磨损 电接触 |
| 英文关键词:micro-arc oxidation aluminum alloy fretting wear electrical contact |
| 基金项目:国家自然科学基金项目（U1530136，51627806，51575459）；四川省青年科技创新团队（2017TD0017） |
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| Author | Institution |
| CUI Ye | a.School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China |
| CAI Zhen-bing | b.Tribology Research Institute, Southwest Jiaotong University, Chengdu 610031, China |
| LIU Xin-long | b.Tribology Research Institute, Southwest Jiaotong University, Chengdu 610031, China |
| LI Zheng-yang | b.Tribology Research Institute, Southwest Jiaotong University, Chengdu 610031, China |
| ZHU Min-hao | b.Tribology Research Institute, Southwest Jiaotong University, Chengdu 610031, China |
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| 中文摘要: |
| 目的 研究不同氧化时间的铝合金表面微弧氧化涂层在电接触条件下的微动磨损行为，并探讨其磨损机理。方法 通过控制氧化时间（10、20、30、40、50、60、70 min），在铝合金表面制备不同表面状态的微弧氧化涂层，并利用四线接触法研究其在电接触条件下接触电阻的变化，通过分析摩擦系数、F-D曲线、磨损形貌、三维轮廓及磨痕化学成分来揭示其微动磨损机理。结果 电接触微动磨损下，氧化不同时间形成的微弧氧化涂层在相同电接触微动磨损条件下的耐磨性存在明显差异，进而影响其电接触行为。氧化10 min时，涂层磨损最严重，磨损区域的涂层迅速失效，从而导致铝合金基体外露，接触电阻骤降至零；氧化50 min时，涂层厚度最大，具有良好的耐磨性，缓减了接触电阻的衰减，接触电阻曲线在衰减过程中受到磨斑表面裂纹的影响而产生波动。结论 氧化时间会影响微弧氧化膜表面形貌、粗糙度以及厚度，对其在电接触条件下的微动磨损行为影响较大。 |
| 英文摘要: |
| The work aims to study fretting wear behavior of micro arc oxidation (MAO) coatings on the surface of aluminum alloy being oxidized for different time under electrical contact conditions. By controlling oxidization time (10, 20, 30, 40, 50, 60, 70 min), MAO coatings exhibiting different surface states were prepared on the surface of aluminum alloy. Changes in contact resistance under electrical contact conditions were studied in a four-probe method. The fretting wear mechanism was revealed by analyzing friction coefficient, F-D curve, worn morphology, 3D profile and grinding crack chemical composition. Wear resistance of the MAO coatings being oxidized for different time varied significantly under the same electrical contact fretting wear conditions, and further affected the electrical contact behavior. The coating being oxidized for 10 min was worn the most seriously, coating in the worn area failed rapidly and the aluminum alloy substrate was even exposed, and contact resistance decreased rapidly. The coating being oxidized for 50 min was the thickest and had good wear resistance, the contact resistance attenuated slowly, and the contact resistance curve fluctuated in the process of attenuation under the effect of cracks on grinding cracks. Oxidation time can affect surface morphology, thickness and roughness of MAO coatings, and it had a great influence on fretting wear behavior of the coatings under electrical contact conditions. |
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