纳米ZnO和SiO_2共混填充UHMWPE复合材料的摩擦磨损行为  

Tribological Behavior of Nano-ZnO and Nano-SiO_2 Filled Ultra High Molecular Weight Polyethylene Composites

作　　者：雷毅[1] 郭建良[1] 

机构地区：[1]中国石油大学机电工程学院,山东东营257061

出　　处：《高分子材料科学与工程》2008年第12期110-113,共4页Polymer Materials Science & Engineering

基　　金：中国石油天然气集团公司石油科技中青年创新基金资助项目(W020311)

摘　　要：以纳米ZnO和纳米SiO2作为复合填料,通过热压成型工艺制备了纳米ZnO-SiO2复合填充超高分子量聚乙烯(UHMWPE)复合材料;采用销-盘式摩擦磨损试验机考察了复合材料在干摩擦条件下与45#钢配副时的摩擦磨损行为;采用扫描电子显微镜观察了复合材料磨损表面形貌。结果表明,适量的纳米ZnO-SiO2作为复合填料可有效地改善UHMWPE的摩擦磨损性能,其中填充2%ZnO+2%SiO2的UHMWPE基复合材料改性效果最为明显。与纯UHMWPE材料相比,其磨损率下降了84.7%。纯UHMWPE的磨损机制主要表现为粘着磨损和疲劳磨损,而不同含量的无机纳米微粒共混填充UHMWPE基复合材料的磨损机制主要表现为不同程度的粘着磨损、犁沟效应和塑性变形特征。Ultra high molecular weight polyethylene （UHMWPE） based composites filled with nanometer ZnO and nanometer SiO2 were prepared by heat compression molding. The friction and wear behaviors of the composites sliding against AISI-1045 carbon steel disc under dry ambient condition were evaluated on a pin-on-disc test rig. The worn surfaces of the composites were observed by scanning electron microsope. It is found that the composites filled with the compound fillers of a proper mass fraction record smaller friction coefficient and wear rate than pure UHMWPE. The composites filled with 2% nano-ZnO ＋ 2% nano-SiO2 obtain better friction and wear properties. Compared with pure UHMWPE, its wear rate decreases 84.7%. The wear mechanisms of pure UHMWPE are mainly adhesive wear and fatigue wear, while the composites filled with inorganic nano-particulates of different mass fraction are characterized by adhesive wear, ploughing wear and plastic deformation in varying degrees.

关 键 词：超高分子量聚乙烯 纳米ZNO 纳米SIO2 复合填充 摩擦磨损性能 

分 类 号：TB383[一般工业技术—材料科学与工程]