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J. Korean Ceram. Soc. > Volume 40(9); 2003 > Article
Journal of the Korean Ceramic Society 2003;40(9): 891.
doi: https://doi.org/10.4191/kcers.2003.40.9.891
용융 Si 침윤방법에 의한 반응소결 탄화규소 고온가스 필터의 제조 및 특성
황성식, 김태우1
국민대학교 기계자동차공학부
1국민대학교 자동차공학대학원
Fabrication and Properties of Reaction Bonded SiC Hot Gas Filter Using Si Melt Infiltration Method
Novel fabrication technique was developed for high strength Reaction-Bonded SiC (RBSC) hot gas filter for use in IGCC (Integrated Gasification Combined Cycle) system. The room and high temperature fracture strengths for Si-melt infiltrated reaction-bonded SiC were 50-123, and 60-66 MPa, respectively. The average pore size was 60-70 $mutextrm{m}$ and the porosity was about 34 vol%. RBSC infiltrated with molten silicon showed improved fracture strength at high temperature, as compared to that of clay-bonded SiC, due to SiC/Si phase present within SiC phase. The thickness for SiC/Si phase was increased with increasing powder particle size of SiC from 10 to 34 $mutextrm{m}$. Pressure drop with dust particles showed similar response as compared to that for Schumacher type 20 filter. The filter fabricated in the present study showed good performance in that the filtered powder size was reduced drastically to below 1 $mutextrm{m}$ within 4 min.
Key words: RBSC, Infiltration, Si, SiC
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