Abstract
The effect of mechanical treatment by planetary ball milling on the properties of hot pressed ZrB2 - 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 ZrB2 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 ceramics.
Highlights
IOP PublishingSeries: Materials Science and Engineering 140 (2016) 012006 doi:10.1088/1757-899X/140/1/012006
The refractory compounds are the basic components of materials used in high-temperature engineering, such as thermal protection of space vehicles, electronics, etc
Among materials with high melting temperature, a special attention is paid to ceramic ZrB2-based composites; strong covalent bonds are the reason of low diffusion mobility of an atom, which appreciably impedes the manufacturing of products
Summary
Series: Materials Science and Engineering 140 (2016) 012006 doi:10.1088/1757-899X/140/1/012006. S Buyakova, A Burlachenko, Yu Mirovoi, I Sevostiyanova, S Kulkov1,2,3 1Institute of Strength Physics and Materials Science SB RAS, 2/4, pr. Akademicheskii, Tomsk, 634055, Russia 2Tomsk Polytechnic University, 30, Lenin Avenue, Tomsk, 634050, Russia 3Tomsk State University, Tomsk, 36, Lenin Avenue, Tomsk, 634050, Russia
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