초고온 소재용 ZrB2계 복합소재의 제조 (Fabrication of ZrB2-based Composites for Ultra-high Temperature Materials)

서지정보

· 발행기관 : 한국분말재료학회
· 수록지 정보 : 한국분말재료학회지 / 16권 / 6호 / 442 ~ 448페이지
· 저자명 : 김성원, 채정민, 이성민, 오윤석, 김형태, 남산

초록

ZrB2-based composites are candidate materials for ultra-high temperature materials (UHTMs). ZrB2
has become an indispensable ingredient in UHTMs, due to its high melting temperature, relatively low density,
and excellent resistance to thermal shock or oxidation. ZrB2 powders are usually synthesized by solid state reactions
such as carbothermal, borothermal, or combined carbothermal reaction. SiC is added to this system in order
to enhance the oxidation resistance of ZrB2. In this study, ZrB2–based composites were successfully synthesized
and densified through two different processing paths. ZrB2 or ZrB2
−25 vol.%SiC was fully synthesized from oxide
starting materials with reducing agents after heat treatment at 1400℃. Besides, ZrB2–20 vol.%SiC was fully densified
with B4C as a sintering additive after hot pressing at 1900℃. The synthesis mechanism and the effect of sintering
additives on densification of ZrB2 –SiC composites were also discussed.

영어초록

ZrB2-based composites are candidate materials for ultra-high temperature materials (UHTMs). ZrB2
has become an indispensable ingredient in UHTMs, due to its high melting temperature, relatively low density,
and excellent resistance to thermal shock or oxidation. ZrB2 powders are usually synthesized by solid state reactions
such as carbothermal, borothermal, or combined carbothermal reaction. SiC is added to this system in order
to enhance the oxidation resistance of ZrB2. In this study, ZrB2–based composites were successfully synthesized
and densified through two different processing paths. ZrB2 or ZrB2
−25 vol.%SiC was fully synthesized from oxide
starting materials with reducing agents after heat treatment at 1400℃. Besides, ZrB2–20 vol.%SiC was fully densified
with B4C as a sintering additive after hot pressing at 1900℃. The synthesis mechanism and the effect of sintering
additives on densification of ZrB2 –SiC composites were also discussed.

참고자료

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