Tribological properties of hot pressing alumina matrix ceramic materials improved by Zr-O-B compounds

摘要

Al_2O_3/ZrB_2/ZrO_2 composites were fabricated by hot pressing technology. The friction and wear behavior of this new material, coupled with cemented carbide ball in unlubricated conditions, were investigated. Experimental results showed that the friction coefficient values and wear rate of alumina matrix ceramic composites toughened by Zr-O-B compounds were lower than that of pure alumina. The generated lubricating film can decrease the friction coefficient of the composites, and makes the wear rate did not reach the theory value.