【摘要】 首次开展了ATM(Auto TellerMachine)高聚物部件在沙尘环境中的磨损研究。在实验室模拟降尘环境中使用ATM中的Tape-scraper摩擦系统,对PI(聚酰亚胺)和PEN(聚萘二甲酸乙二酯)两种高聚物薄带的磨损行为进行了研究,并利用扫描电镜对薄带的磨损表面进行了分析。实验采用了采集自沙漠的自然沙尘。实验结果表明:PI薄带比PEN薄带表现出更优良的耐沙尘磨损性能。PEN薄带的微观磨损机理主要是纤维组织的塑性流动和拉断,而PI薄带的微观磨损机理为裂纹的萌生、扩张和块状剥落。用材料的机械变形因子可以很好地解释两种聚合物薄带的磨损特性差异。更多还原

【Abstract】 The wear behaviors of polymer parts of ATM(Auto Teller Machine) in the sand dust environment were firstly investigated.The tape-scraper tribosystem derived from ATM was used to study the wear behaviors of PEN(poly(ethylene-2,6-naphthalenedicarboxylate)) and PI(polyimide) tape under the falling sand dust environment with varied sand dust flow rate.The natural sand sampled from the desert was used as the falling dust.Scanning Electron Microscopy(SEM) analysis was carried out to understand the operating wear mechanisms.As main results,the PI tape has higher wear resistance to the sand dust particles than PEN tape does.The micro wear mechanism for PEN is plastic flow and broken of the fiber structure,while that for PI is crack initiation,extending and block fracture.The deformation factors show good explanation of the wear resistance of polymer tapes.更多还原