Producing composite materials based on ZrB[2], ZrB[2]-SiC

Abstract

The effect of mechanical treatment by planetary ball milling on the properties of hot pressed ZrB[2] - SiC ceramics was studied. It has been shown that material densification after mechanical treatment is finished at initial stages of sintering process. Addition of SiC causes a substantial increase in density of the sample to 99% of the theoretical powder containing 20% of silicon carbide, in comparison with samples ZrB[2] density not exceeding 76%. It has been shown that all defects which were accumulated during mechanical treatment anneal in hot pressure process and there are no any changes of CDD values in sintered ceramics.