作　　者： ; ; ; ; ;

机构地区： 郑州轻工业学院材料与化学工程学院

出　　处： 《润滑与密封》 2006年第10期74-78,共5页

摘　　要： 为了探讨纳米SiO2(n-SiO2)对火焰喷涂尼龙(PA)1010涂层干摩擦磨损性能的影响,采用MRH-3型环-块摩擦磨损试验机对不同n-SiO2含量的尼龙1010涂层的干摩擦磨损性能进行了测试;并利用扫描电子显微镜(SEM)对复合涂层的磨损表面进行观察,以探讨n-S iO2对火焰喷涂尼龙1010涂层摩擦磨损性能的影响机制。结果表明:n-SiO2的加入能明显提高尼龙涂层的耐磨性,降低摩擦因数,疲劳磨损、粘附磨损及犁切现象明显减轻;当n-SiO2含量为1.5%(质量分数)时,复合涂层摩擦磨损性能最佳,试验条件下磨损量降低近4倍,摩擦因数降低23%,跑合期降低44%,复合涂层与GCr15钢环对磨时的磨损机制主要为疲劳磨损和轻微的粘附磨损。 To investigate the effects of nano-SiO2 on the dry sliding wear of flame spray nylon1010 composite coatings, the friction and wear behaviors of the nylon1010/n-SiO2 composite coatings were examined using a MRH-3 friction and wear tester. Based on the morphological observation of the worn surfaces ,the possible wear mechanism was discussed. The result shows that nano-SiO2 particles can increase the wear resistance of the nylonl010 coatings. As the coating contains 1.5% （weight content） nano-SiO2, the favorable wear resistance of the coating is obtained. The specific wear rate of the composite coatings is 4 times lower than that of nylon coating and the frictional coefficient is decreased by 23% and running-in period is decreased by 44%. The composite coatings are dominated by abrasive and mild adhesion wear as they slid against the steel counterpart in dry ambient condition.

关 键 词： 纳米 火焰喷涂 尼龙 涂层 摩擦磨损

领　　域： [一般工业技术]