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首页> 外文期刊>Digest Journal of Nanomaterials and Biostructures >PERFORMANCE OF HIGHSPEED FRICTION AND WEAR OFELECTROSPARK DEPOSITED AlCoCrFeNi HIGH ENTROPYALLOY COATING
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PERFORMANCE OF HIGHSPEED FRICTION AND WEAR OFELECTROSPARK DEPOSITED AlCoCrFeNi HIGH ENTROPYALLOY COATING

机译：电火花沉积AlCoCrFeNi高熵合金涂层的高速摩擦性能

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An AlCoCrFeNi high-entropy alloy coating was prepared on a CrNi3MoVA steel substrate by means of electrospark deposition (ESD) technology and its high-speed friction and wear performance investigated. The nano-mechanical properties and friction coefficient were tested by employing the nanoindentor and the friction and wear testing machine respectively, and the phase structure was obtained by using X Ray Diffraction (XRD), and the morphologies, composition were analyzed before and after friction by utilizing scanning electron microscopy (SEM) and energy dispersive X-ray spectrum (EDS) .The results showed that the AlCoCrFeNi coating, with compact structure free of cracks, is composed of BCC and FCC double phases; the hardness of the AlCoCrFeNi coating increases about 1.0 time, the elasticity modulus reduces about 2.3%, the H/E value increases about 1.1 times, and the H3/E2 value increases about 7.8 times than that of the CrNi3MoVA steel; when the quenched GCr15 steel ball was used as the material of the grinding head under the friction condition that the load was 10 N, the reciprocating travel 10 millimeter and the velocity 1000 rounds per minute, the steady friction coefficient of the CrNi3MoVA steel is 0.85-0.95 while that of the AlCoCrFeNi coating only 0.29-0.38, and the wear rate of the CrNi3MoVA steel is about 9.4 times that of the AlCoCrFeNi coating. The AlCoCrFeNi coating has an obvious anti-friction and wear resistance effect, which mainly attributes to the high mechanical properties and the formed oxide scale with good adherence on the coating in the course of high-speed friction and wear.
机译：利用电火花沉积（ESD）技术在CrNi3MoVA钢基底上制备了AlCoCrFeNi高熵合金涂层，并研究了其高速摩擦磨损性能。分别使用纳米压头和摩擦磨损试验机测试了纳米力学性能和摩擦系数，并利用X射线衍射仪（XRD）获得了相结构，并通过摩擦分析了摩擦前后的形貌，组成。结果表明，结构紧凑，无裂纹的AlCoCrFeNi涂层由BCC和FCC双相组成。与CrNi3MoVA钢相比，AlCoCrFeNi涂层的硬度提高了约1.0倍，弹性模量降低了约2.3％，H / E值提高了约1.1倍，H3 / E2值提高了约7.8倍。当在负荷为10 N，往复行程为10毫米，速度为1000转/分钟的摩擦条件下，使用淬火的GCr15钢球作为磨头的材料时，CrNi3MoVA钢的稳态摩擦系数为0.85- 0.95而AlCoCrFeNi涂层的磨损率仅为0.29-0.38，而CrNi3MoVA钢的磨损率约为AlCoCrFeNi涂层的9.4倍。 AlCoCrFeNi涂层具有明显的抗摩擦和耐磨作用，这主要归因于高机械性能和形成的氧化皮，在高速摩擦和磨损过程中对涂层具有良好的附着力。

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