纳米SiO_2对火焰喷涂尼龙1010涂层干摩擦磨损性能的影响  

Effects of Nano-SiO_2 on the Dry Sliding Wear of Flame Spray Nylon1010 Composite Coatings

作　　者：李亚东[1] 马亿珠[1] 闫福丰[1] 曹少魁[2] 张治军[3] 

机构地区：[1]郑州轻工业学院材料工程系,河南郑州450002 [2]郑州大学材料工程学院,河南郑州450052 [3]河南大学特种功能材料重点实验室,河南开封475001

出　　处：《润滑与密封》2006年第10期74-78,共5页Lubrication Engineering

基　　金：河南省自然科学基金资助项目(0311022400);河南省教育厅科技攻关资助项目(2003530293);河南省高校杰出人才创新工程资助项目(2006KYCX007)

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SIO2 火焰喷涂 尼龙1010 涂层 摩擦磨损 

分 类 号：TB332[一般工业技术—材料科学与工程]