| 보론과 카본 조제를 사용한 AlN-SiC-TiB2계의 고온가압 및 Spark Plasma Sintering |
| 이세훈, 김해두 |
| 한국기계연구원 부설 재료연구소 엔지니어링세라믹연구그룹 |
| Hot Pressing and Spark Plasma Sintering of AlN-SiC-TiB2 Systems using Boron and Carbon Additives |
| Sea-Hoon Lee, Hai-Doo Kim |
| Engineering Ceramic Research Group, KIMS |
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| ABSTRACT |
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Effects of boron and carbon on the densification and thermal decomposition of an AlN-SiC-$TiB_2$ system were investigated. $SiO_2$ was mostly removed by the addition of carbon, while $Al_2O_3$ formed $Al_4O_4C$ and promoted the densification of the systems above $1850^{circ}C$. Rather porous specimens were obtained without the additives after hot pressing at $2100^{circ}C$, while densification was mostly completed at $2000^{circ}C$ by using the additives. The sintering temperature decreased further to $1950^{circ}C$ by applying spark plasma sintering. The additives promoted the shrinkage of AlN by forming a liquid phase which was originated from the carbo- and boro-thermal reduction of $Al_2O_3$ and AlN. |
| Key words:
Additives, Aluminum nitride, Silicon carbide, Densification |
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