Transmission Electron Microscopy Investigation of Hot-pressed ZrB2-SiC with B4C Additive Kim, Seongwon; Chae, Jung-Min; Lee, Sung-Min; Oh, Yoon-Suk; Kim, Hyung-Tae; Jang, Byung-Koog;
This paper reports the microstructure of hot-pressed -SiC ceramics with added as characterized by transmission electron microscopy. has a melting point of , a relatively low density of , and specific mechanical properties at an elevated temperature, making it a candidate for application to environments with ultra-high temperatures which exceed . Due to the non-sinterability of -based ceramics, research on sintering aids such as or has become prominent recently. From TEM investigations, an amorphous layer with contaminant oxide is observed in the vicinity of grains remaining in hot-pressed -SiC ceramics with as an additive. The effect of a addition on the microstructure of this system is also discussed.
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