Effect of sintering additive types on tribological properties of B4C ceramics
In order to investigate the effect of sintering additive types on tribological properties of B4C ceramics,the B4C ceramics were prepared by hot press sintering method using B4C powder as raw materials and adding four different types of sintering additives(carbon black,SiC,Al2O3 and Al2O3-Y2O3),respectively,and the friction and wear behaviors of the B4C ceramics with different types of sintering additives sliding against SiC balls under dry sliding conditions were studied.The results show that under the conditions of this experiment,both the B4C ceramics with Al2O3 sintering additive(B4C(Al2O3))and the corresponding SiC ball have the smoothest worn surfaces,the B4C(Al2O3)/SiC friction pair shows the lowest friction coefficient,and the B4C(Al2O3)ceramics show the lowest wear rate.The wear mechanism of the B4C ceramics with added carbon black,SiC and Al2O3 sintering additives is mainly grain fracture,while the wear mechanism of the B4C ceramics with added Al2O3-Y2O3 sintering additive is mainly grain pull-out.
NETL
NSTL
万方数据
