摘要：
A ball-on-three-disc modification of the four-ball wear tester was utilized to evaluate the wear property of Si3N4 lubricated with mineral oil, containing additives such as oleic acid, stearic acid and zinc dialkyldithiophosphate (ZDP). For comparison, the wear of a steel ball on Si3N4 discs and an Si3N4 ball on Si3N4 discs was investigated for identical test conditions, and the worn surfaces of the discs were analyzed using scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The study indicates that the steel ball-on-Si3N4 disc system usually gives less wear of the Si3N4 disc compared with the Si3N4 ball-on-Si3N4 disc system. Among the three tested additives, ZDP shows best antiwear property even at a load of 396 N in the Si3N4 ball-on-Si3N4 disc system. XPS results reveal that a protective surface film containing the products of degraded ZDP was formed on the rubbed surfaces.
微信公众号
下载app
京公网安备 11010202008974号