WC陶瓷/环氧树脂复合涂层的抗泥沙冲蚀磨损性能

摘要

在环氧树脂中分别添加占体系总质量0％、10％、20％和30％的碳化钨(WC)陶瓷颗粒,制备出WC陶瓷/环氧树脂复合涂层,考察了它们的洛氏硬度、抗拉结合强度和抗泥沙冲蚀磨损性能.通过扫描电镜观察了涂层冲蚀试验后的表面形貌,探讨了涂层在泥浆中的冲蚀磨损机理.WC陶瓷/环氧树脂涂层的洛氏硬度均高于纯环氧涂层的洛氏硬度(49 HR),为103 ～ 107HR,且随着WC陶瓷颗粒的用量增多而提高.当WC加入量为10％时,复合涂层的抗拉结合强度最大,达16 MPa;且磨损率最小,为0.017％.WC陶瓷颗粒与环氧树脂基体发生协同作用,既降低了环氧树脂被磨损的概率,又很好地固定住WC陶瓷颗粒,使其难以被挖出脱落,从而使WC陶瓷/环氧树脂复合涂层获得较好的抗冲蚀性能.%WC (tungsten carbide) ceramic/epoxy composite coatings were prepared by adding 0％,10％,20％ and 30％ (mass ratio to total mass of paint) WC ceramic to epoxy resin respectively.Their Rockwell hardness,pull adhesion strength and slurry erosion wear resistance were studied.The surface morphologies of the coatings after erosion test were observed by scanning electron microscope.The erosion wear mechanism of coating in slurry was analyzed.The Rockwell hardness of WC ceramic/epoxy composite coatings is 103-107 HR,higher than pure epoxy coating's 49 HR,and proportional to the amount of WC particles.The composite coating containing 10％ of WC particles has the highest pull adhesion strength of 16 MPa and lowest wear rate of 0.017％.WC ceramic particle and epoxy resin were found to have synergetic effect,due to which,the probability that the epoxy resin be wom out is reduced,while the WC particles are firmly fixed in resin making it hard to be dug out and come off.Thus the WC ceramic/epoxy composite coatings have good erosion resistance.