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采用固态烧结法制备Cu-WC金属基复合材料涂层。将不同体积分数(5%-30%)的WC增强颗粒与Cu颗粒混合,然后在还原性气氛和垂直膨胀计中于1000°C进行烧结。结果表明,复合材料涂层的烧结动力学受基体材料和WC颗粒的影响,WC颗粒能减缓粉末径向和轴向的致密化。复合材料涂层紧实地粘附于基体上,而WC颗粒随机分布在基体中。与未添加增强剂的样品相比,添加了WC增强剂的样品的显微硬度增加,磨损量降低至原来的1/17。样品在载荷为5 N条件下的主要磨损机理为磨粒磨损,当WC增强剂的体积分数为20%时复合涂层的性能最优。
Solid state sintering method for preparing Cu-WC metal matrix composite coating. WC reinforcing particles of different volume fractions (5% -30%) were mixed with Cu particles and then sintered at 1000 ° C in a reducing atmosphere and vertical dilatometer. The results show that the sintering kinetics of the composite coating is affected by the matrix material and WC particles, WC particles can slow the powder radial and axial densification. The composite coating tightly adheres to the substrate while the WC particles are randomly distributed in the matrix. The microhardness of the sample with the WC reinforcement increased as compared to the sample without the enhancer, reducing the amount of wear to 1/17 of the original. The main wear mechanism of the sample under the load of 5 N is abrasive wear. The composite coating has the best performance when the volume fraction of WC enhancer is 20%.