The influence of ZrB[2]-SiC powders mechanical treatment on the structure of sintered ceramic composites

Abstract

The effect of mechanical treatment by planetary ball milling on the properties of hot pressed ZrB[2] - SiC ceramics was studied. It was shown that material densification after mechanical treatment is finished at initial stages of sintering process. Addition of SiC leads to an essential increase of sample density to 99% of theoretically achievable for powder with 2% of SiC, as compared with ZrB[2] with the density less than 76%. It was demonstrated that all defects that were accumulated during mechanical treatment are annealed during hot pressing, and there are no changes of CDD values in sintered.