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采用火焰喷涂法制备了聚酰胺12/纳米SiO2(PA12/n-SiO2)涂层.利用红外光谱仪(FTIR)和X-射线衍射仪(XRD)对涂层的结构进行了分析;利用摩擦磨损试验机及扫描电子显微镜表征了涂层的摩擦磨损性能及磨损表面形貌.结果表明:火焰喷涂法适宜制备PA12/n-SiO2涂层;PA12/n-SiO2粉末在火焰喷涂过程中没有发生氧化或降解反应;n-SiO2含量为1.5wt%的涂层在100 N、100 r/min、60 min的干摩擦条件下,其摩擦系数为0.52,磨损量为1.5 mg,跑合期为25 min左右,而纯涂层在相同摩擦条件下摩擦系数、磨损量、跑合期分别为0.59、3.5 mg和35 min,跑合期较纯涂层短,显示复合涂层具有较好的耐磨性能,分析认为涂层的磨损机理主要为疲劳磨损、塑性变形和黏着磨损.
The PA 12 / nano-SiO 2 (PA12 / n-SiO 2) coating was prepared by flame spraying method.The structure of the coating was analyzed by FTIR and XRD. The results show that flame retardant PA12 / n-SiO2 coating is suitable for PA12 / n-SiO2 coating and no oxidization of PA12 / n-SiO2 powder occurs during flame spraying The friction coefficient was 0.52, the abrasion loss was 1.5 mg and the run-in period was 25 min under the condition of 100 N, 100 r / min and 60 min dry friction. , While the pure coating under the same friction conditions, the friction coefficient, wear amount, run-in period were 0.59,3.5 mg and 35 min, run-in period is shorter than the pure coating, showing that the composite coating has good wear resistance, Analysis shows that the wear mechanism of the coating is mainly fatigue wear, plastic deformation and adhesive wear.