石墨-二硫化钼-三氧化二锑改性环氧树脂复合涂层的制备与性能

Preparation of Epoxy Resin Bonded Solid Lubricating Coatings Containing Graphite-Molybdenum Disulfide-Antimony Trioxide and Evaluation of Friction and Wear Behavior of the Coatings

为进一步提高固体润滑涂层的耐热性和耐磨性,以改性环氧树脂为主要成分,聚酰胺为固化剂,制备了含MoS2、石墨和Sb2O3的粘结固体润滑涂层。参照相关标准测试了涂层的外观、附着力、硬度及摩擦学性能;研究了石墨、MoS2质量比及Sb2O3用量对涂层耐热性、耐磨性的影响。结果表明:50 g改性环氧树脂,15 g聚酰胺,石墨与MoS2质量分数为3∶2,总质量为30 g时,石墨与MoS2的协同效应最好,涂层具有较好的耐热性及耐磨性,经高温灼烧几乎无变化,磨损失重、摩擦系数最小,分别为263 mg和0.28;增强剂Sb2O3的加入使涂层硬度提高,耐磨性增加,对其耐热性影响不明显,用量为3 g时涂层摩擦学性能最佳,摩擦系数降至0.26。

Epoxy resin bonded solid lubricating coatings containing MoS 2,graphite and Sb2O3 were prepared with epoxy resin as the major matrix and polyamide as the curing agent. The appearance,adhesion force to substrate,hardness,and friction and wear behavior of as-prepared coatings were examined with relevant standard methods. Besides,the heat resistance and wear resistance of the coatings were investigated in relation to the mass ratio of graphite to MoS 2 and the dosage of Sb2O3. Results indicated that the bonded solid lubricating coating prepared at an epoxy resin mass of 50 g,polyamide mass of 15 g,and graphite to MoS 2 mass ratio of 3∶ 2( with a total mass of 30 g) had the best heat resistance as well as the lowest wear mass loss and friction coefficient,and it remained almost unchanged after being calcinated at elevated temperature,which was attributed to the optimized synergistic effect between graphite and MoS 2 thereat.Moreover,introducing Sb2O3( the reinforcing agent) helped to increase the hardness and wear resistance but had little effect on the heat resistance of the bonded solid lubricating coating. Particularly,the bonded solid lubricating coating obtained at a Sb2O3 dosage of 3 g possessed the best wear resistance.