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Surface characteristics underpinning fretting wear performance of heavily loaded duplex chameleon/PEO coatings on Al
Tribology International ( IF 6.1 ) Pub Date : 2021-02-01 , DOI: 10.1016/j.triboint.2020.106723
Mengyu Lin , Aneta Nemcova , Andrey A. Voevodin , Andras Korenyi-Both , Tomasz W. Liskiewicz , Nicolas Laugel , Allan Matthews , Aleksey Yerokhin

Abstract Duplex coatings comprising MoS2/Sb2O3/graphite layer burnished on top of plasma electrolytically oxidised AA6082 alloy enhanced fretting wear resistance against alumina and steel whilst reducing friction from ∼0.6…0.9 to ∼0.08…0.1 in dry nitrogen and humid air. Transitions to stick-slip (∼3 μm), partial slip (5-10 μm) and gross slip (>10 μm) showed an order of magnitude improvements over single-layer PEO coatings. In the latter mode, high initial contact pressures (∼1.1 GPa) with steel counterpart under oxidising atmosphere increased friction due to generation of Fe/Al/Cr oxides/hydroxides in the contact region, leading micro-cracking in PEO coating followed by fatigue damage of aluminium substrate. Reducing contact pressure

中文翻译:

支撑铝上重载双相变色龙/PEO涂层微动磨损性能的表面特征

摘要 由等离子电解氧化 AA6082 合金顶部抛光的 MoS2/Sb2O3/石墨层组成的双相涂层增强了对氧化铝和钢的微动磨损性,同时在干燥的氮气和潮湿空气中将摩擦从 ~0.6…0.9 降低到 ~0.08…0.1。与单层 PEO 涂层相比,向粘滑(~3 μm)、部分滑移(5-10 μm)和总滑移(> 10 μm)的转变显示出一个数量级的改进。在后一种模式中,由于在接触区域产生 Fe/Al/Cr 氧化物/氢氧化物,与钢对应物在氧化气氛下的高初始接触压力(~1.1 GPa)会增加摩擦,导致 PEO 涂层出现微裂纹,然后疲劳损坏铝基板。降低接触压力
更新日期:2021-02-01
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