| Home | E-Submission | Sitemap | Login | Contact Us |  
J. Korean Ceram. Soc. > Volume 42(8); 2005 > Article
Journal of the Korean Ceramic Society 2005;42(8): 567.
doi: https://doi.org/10.4191/kcers.2005.42.8.567
Al-B-C 첨가 탄화규소의 스파크 플라즈마 소결에 의한 미세구조 발달
조경식, 이광순, 이현권, 이상진1, 최헌진2
금오공과대학교 신소재시스템공학부
1목포대학교 신소재공학과
2연세대학교 신소재공학부
Microstructure Development of Spark Plasma Sintered Silicon Carbide with Al-B-C
Kyeong-Sik Cho, Kwang-Soon Lee, Hyun-Kwuon Lee, Sang-Jin Lee1, Heon-Jin Choi2
School of Advanced Materials and System Engineering, Kumoh National Institute of Technology
1Department of Advanced Materials Science and Engineering, Mokpo National University
2School of Advanced Materials Engineering, Yonsei University
Densification of SiC powder with additives of total amount of2, 4, 8 $wt%$ Al-B-C was carried out by Spark Plasma Sintering (SPS). The unique features of the process are the possibilities of a very fast heating rate and a short holding time to obtain fully dense materials. The heating rate and applied pressure were kept at $100^{circ}C/min$ and 40 MPa, while the sintering temperature and holding time varied from 1700 - $1800^{circ}C$ for 10 - 40 min, respectively. The SPS-sintered specimens with different amount of Al-B-C at $1800^{circ}C$ reached near-theoretical density. The $3C{rightarrow}6H,;15R{rightarrow}4H$ phase transformation of SiC was enhanced by increasing the additive amount. The microstructure of SiC sintered up to $1750^{circ}C$ consisted of fine equiaxed grains. In contrast, the growth of large elongated grains in small matrix grains was shown in sintered bodies at $1800^{circ}C$, and the plate-like grains interlocking microstructure had been developed by increasing the holding time at $1800^{circ}C$. The grain growth rate decreases with increasing amount of Al-B-C in SiC starting powder, however, the both of volume fraction and aspect ratio of large grains in sintered body increased.
Key words: SiC, Spark plasma sintering, Rapid densification, Interlocking microstructure
Editorial Office
Meorijae Bldg., Suite # 403, 76, Bangbae-ro, Seocho-gu, Seoul 06704, Korea
TEL: +82-2-584-0185   FAX: +82-2-586-4582   E-mail: ceramic@kcers.or.kr
About |  Browse Articles |  Current Issue |  For Authors and Reviewers
Copyright © The Korean Ceramic Society.                      Developed in M2PI