将0.5%(质量分数)羟基硅酸镁自修复材料分散在长城牌汽油机润滑油SJ10W-40中,用摩擦磨损实验机考察羟基硅酸镁自修复材料对球墨铸铁摩擦副的减摩、抗磨及自修复性能,并与未添加自修复材料的润滑油进行对比。用扫描电子显微镜分析试样磨痕表面的形貌,并用能谱仪分析了其元素组成。结果表明:添加羟基硅酸镁自修复材料后,球墨铸铁摩擦副摩擦系数降低了68.8%;磨痕处存在与基体材料不同的修复区域,该修复区域沉积了Si,Mg,Al等元素。羟基硅酸镁自修复材料具有优良的减摩抗磨性能和自修复性能。
Magnesium silicate hydroxide self-repairing material (0.5%, in mass) was dispersed into lubrication oil (Great Wall SJIOW-40). The anti-friction and anti-wear performance of the ductile cast iron friction pairs were examined by using a friction and wear tester. A comparison was made between SJ10W-40 lubrication oil with and without magnesium silicate hydroxide. The surface morphologies and elementary composition of grinding cracks of the sample were analyzed by using scanning electron microscopy and energy dispersive spectrometry. The results show that after magnesium silicate hydroxide self-repairing material is added to the lubrication oil, the friction coefficient decreases by 68.8%. There is a repairing layer whose material is different from the basic bulk material on the grinding cracks; in addition, Si, Mg, Al and other elements are deposited on the repairing layer. Magnesium silicate hydroxide self-repairing material possesses superior resistance to abrasion, excellent anti-friction properties and a self-repairing effect.