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利用环-块摩擦磨损试验机研究了A lCoCrFeN iCu高熵合金/GCr15摩擦副在质量百分数为30%、60%、90%H2O2介质及去离子水中,于3种速度下的摩擦磨损行为,利用XRD和SEM研究了高熵合金的相结构和显微组织,并对摩擦磨损前后的表面形貌进行了分析.试验发现:高熵合金与GCr15摩擦副的摩擦系数和磨损量均随H2O2浓度的升高而减小,且高熵合金在H2O2介质中的磨损量远小于纯水中的磨损量.高熵合金在去离子水中以严重的黏着磨损为主,在30%和60%H2O2介质中,高熵合金的磨损机制转变为氧化磨损、磨粒磨损和黏着磨损的综合作用,在高浓度H2O2(90%)中,由于生成的氧化膜较稳定,使得高熵合金的磨损表面仅有很浅的犁沟,磨损程度明显降低.
The friction and wear behavior of A lCoCrFeN iCu high entropy alloy / GCr15 friction pair in 3%, 30%, 60%, 90% H2O2 and deionized water was studied by ring-block friction and wear tester. XRD and SEM were used to study the phase structure and microstructure of the high-entropy alloy, and the surface morphology before and after the tribological wear was analyzed.It was found that the friction coefficient and wear amount of the high entropy alloy and the GCr15 friction pair both changed with the concentration of H2O2 And the wear amount of high-entropy alloy in H2O2 medium is far less than the wear amount in pure water.High entropy alloy is mainly adhered and weakened in deionized water in 30% and 60% H2O2 medium , The wear mechanism of high-entropy alloy is transformed into the combined effect of oxidative wear, abrasive wear and adhesive wear. In the high concentration of H2O2 (90%), due to the relatively stable oxide film formed, the wear surface of high-entropy alloy is the only Shallow furrows, wear significantly reduced.