环氧树脂基复合材料的摩擦磨损性能研究.pdf

天津工业大学硕士学位论文环氧树脂基复合材料的摩擦磨损性能研究姓名:辛少波申请学位级别:硕士专业:材料学指导教师:梁小平 20080101 摘要纯环氧树脂耐磨性较差,使得其在摩擦磨损领域的应用受到限制。本文采用纳米Si02颗粒和玄武岩纤维增强环氧树脂,对其摩擦磨损性能进行了研究。将溶胶凝胶法制备的纳米Si02加入环氧树脂中,制备了纳米Si02/环氧树脂复合材料,测试其力学性能和摩擦磨损性能,讨论了摩擦磨损机理。结果表明, 纳米Si02的加入,使复合材料的拉伸强度远高于环氧树脂的拉伸强度,复合材料的磨损率和摩擦系数,随着Si02质量分数的增加而逐渐降低,当Si02的质量分数达到约4%时,复合材料的耐磨性最好。复合材料的磨损机理以磨粒磨损、粘着磨损和疲劳磨损为主。采用玄武岩短纤维增强环氧树脂,研究了玄武岩短纤维/环氧树脂复合材料拉伸性能以及摩擦磨损性能。结果表明,和纯树脂相比,复合材料的拉伸强度大幅度提高,但是拉伸延长率下降;摩擦系数降低,耐磨性能有较大的提高,偶联剂对玄武岩纤维的表面处理对复合材料的摩擦磨损性能有很大影响。制备了连续玄武岩纤维/环氧树脂复合材料,测试了材料的抗弯强度和摩擦磨损性能。结果显示,与玄武岩短纤维/环氧树脂复合材料相比,连续玄武岩纤维/环氧树脂复合材料有较低且稳定的摩擦系数。随着树脂含量的增加,复合材料的抗弯强度有了较大的改善。吸水性表明致密复合材料的树脂最低含量为 25%。并且伴随着树脂含量的增加,摩擦系数稳步上升,磨损率增大,直至接近单纯环氧树脂的磨损率。树脂含量的变化引起了复合材料磨损机制的变化,连续玄武岩纤维/环氧树脂复合材料的磨损机制主要是磨粒磨损。关键词:环氧树脂;复合材料;纳米Si02;玄武岩纤维:摩擦磨损 Abstract The pure epoxy resin(EP)shows some ing intribological property with higher frictioncoef五cient and wear limitsitsapplications inthe area of iSnecessary bine thebasaltfibersand epoxy resin to improve the friction and wear thispaper,Epoxy posites filledwith basalt fiberswere prepared by proper KH一550 silane coupling agent to enhance the interracial bonding between the anic reinforcing agent and thepolymer the tribologiical and mechanical behavior posites has been ,the friction and wear mechanism posites hasalsobeen discussed. Nano·Si02/posites were prepared by adding thenanosize Si02 particle, prepared by sol-gel method,into epoxy mechanical and tribological properties were worn surface and tribological mechanism were investigated by means results showed thatSi02 sharply reduced the 衔ction coefficient and wear The addition tensile strength posites ismuch higher thanthepure the content ofnanoparticles resultsinthefallofwear proportion ofstandard SiOz/epoxy resin-posite iS4%.And theSEM indicated thatwearmechanisms are mainly abrasive wear andadhesive wear including liglltfatigue w