【摘要】 高温炭化法制备出碳/二氧化硅复合颗粒(CS),并采用化学镀实现复合颗粒表面改性,使其表面均匀覆盖一层纳米铜颗粒(Cu-CS),其目的在于开发出高温耐磨添加剂,进而实现稻壳资源化利用。主要研究镀铜复合颗粒在高温真空条件下的摩擦学行为:在高温真空摩擦磨损试验机上,研究了含不同添加量的镀铜复合颗粒对铁基复合材料摩擦学行为的影响。结果表明,在高温真空条件下,CS颗粒可改善铁基材料的摩擦学特性,其中添加5wt%和7wt%的CS颗粒的复合材料的摩擦系数最小,材料的抗磨减磨性明显提高,且材料的摩擦磨损机理以黏着磨损为主。更多还原

【Abstract】 The carbon/silica composite particles were prepared by high temperature carbonization method,and the surface modification of the composite particles was carried out by electroless plating to cover the copper particles with uniform copper particles on the surface in order to obtain high temperature antiwear additive from the rice husk power.The tribological behavior of iron base composite materials including the different contents of Cu-CS particles was conducted on a high temperature and vacuum tribometers.Results show that Cu-CS particles can modify the friction and wear properties of iron base materials in the case of high temperature and high vacuum conditions.The friction coefficients of iron base composites including the 5 wt% and 7 wt% Cu-CS paticles are smaller than those with the uncoated CS particles.The wear mechanism is mainly adhesive wear via the observation of scanning electron microscopy.更多还原