Research on Friction and Wear Performance of TiB₂ Based Self-lubricating Ceramic composites

摘要

TiB_(2) based self-lubricating ceramic composites with the addition of different content of h-BN were prepared by hot pressing technique and their mechanical properties were tested. Friction and wear experiments are conducted on a MMW – 1A configuration control universal friction and wear testing machine. Friction and wear properties of the ceramic composites under different speed and load were studied. The results show that with the increase of the content of h-BN, the hardness, flexural strength and fracture toughness showed a trend of decrease. When load was fixed, with the increase of rotational speed, the friction coefficient rose and the wear rate were first decreased and then increased. When rotational speed was fixed, the friction coefficient and wear rate first decreased and then increased with the increase of load. In nitrogen, the friction coefficient and wear rate of material were higher than those in the air.