利用火焰喷涂法制备PA1010/n-SiO_2复合涂层,并采用均匀试验设计方法研究涂层在干摩擦条件下同GCr15钢环配副时的摩擦学性能;利用SPSS 12.0统计软件对试验结果进行回归分析,建立涂层摩擦系数和磨损质量损失同pv值(摩擦载荷与摩擦速度的乘积)相关性的数学模型;利用示差扫描量热仪(Differential scanning calorimetry,DSC)和扫描电子显微镜(Scanning electron microscope,SEM)对复合涂层的热性能和磨损表面形貌进行分析。结果表明,n-SiO_2的加入能明显提高涂层的结晶性能、耐磨性能。当n-SiO_2含量为1.5%时,复合涂层摩擦磨损性能最佳,在试验条件下磨损质量损失降低近4倍,摩擦因数降低23%,跑合期缩短44%,复合涂层与GCr15钢环对磨时的磨损机理主要为疲劳磨损和轻微的粘附磨损。
【英文摘要】
To investigate the effects of n-SiO_2 on the tribological behavior of flame spray PAl010 composite coatings,the tribological properties of the PA1010/n-SiO_2 composite coatings are examined by using a MRH-3 friction and wear tester.The statistical regression analysis of the experimental results are performed by using SPSS12.0 software for Windows.The results show that PA1010/n-SiO_2 composite coatings present better friction resistance than pure PA1010 coating.Based on the morphological observation of the w...