열간가압소결법으로 제조한 탄화규소의 균열자기치유 특성
Characterization of crack self-healing of silicon carbide by hot press sintering
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초록
본 연구에서는 열간가압소결법으로 SiC를 소결하여 균열자기치유 특성을 분석하였다. SiC는 Al2O3와 Y2O3를 소결조제로 1950 o C, 50 MPa, 아르곤(Ar) 분위기에서 소결하였다. 소결된 시편을 3 × 4 × 40mm로 절단 및 가공하고, Vickers 경도기를 이용하여 49.6 N으로 예비균열을 생성하였다. 1200~1400 o C, 1~10시간 산화분위기에서 열처리한 후 XRD, SEM, 3 점 굽힘강도를 측정하였다. 1300 o C 1시간에서 741 MPa, 5시간에서 770 MPa로 가장 우수한 균열자기치유 효과를 나타내는것으로 분석되었다.
Abstract
In this study, it was investigated that characteristic of crack-self-healing of hot-pressed SiC. SiC ceramics was sintered with Al2O3 and Y2O3 sintering additive by hot press. Sintering was performed in hot-press furnace in flowing argon (Ar), holding for 3 hr under 1950 o C and 50 MPa. The sintered SiC was machined into 3-point bending strength specimen of 3 × 4 × 40 mm, and introduced pre-crack by Vickers indentation at 49.6 N. Specimens were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), 3-point bending strength after heat treatment at 1200~1400 o C for 1~10 hr. The best crack-self-healing ability was achieved 770 MPa 3-point bending strength by heat treatment at 1300 o C for 5 hr.
참고문헌 (22)
- G. A. Slack, "Thermal conductivity of pure and impure silicon, silicon carbide, and diamond", J. Appl. Phys, 35, pp.3460~ (1964)
- D. L. Barrett, "Electron mobility measurements in SiC polytypes", J. Appl. Phys, 38, pp.53~ (1967)
- L. H. Ford, "Recent developments of coatings for GCFR and HTGCR fuel particles and their performance", J. Nucl. Mater, 45, pp.139~ (1972)
- L. L. Sneada, "Handbook of SiC properties for fuel performance modeling", J. Nucl. Mater, 371, pp.329~ (2007)
- 서진원, "탄화규소 화학기상증착 공정에서 CFD를 이용한 균일도 향상 연구", 한국결정성장학회지, 24(6), pp.242~245 (2014), 한국결정성장학회[DOI]
- J. J. Petrovic, "Controlled surface flaws in hot-pressed SiC", J. Am. Ceram. Soc, 59, pp.34~ (1976)
- T. K. Gupta, "Crack healing and strengthening of thermally shocked alumina", J. Am. Ceram. Soc, 59, pp.259~ (1976)
- S. R. Choi, "Crack healing behaviour of hot pressed silicon nitride due to oxidation", Scr. Metall. Mater, 26, pp.1263~ (1992)
- J. E. Moffatt, "High temperature crack annealing effect on fracture toughness of alumina and alumina-SiC composite", Br. Ceram. Trans, 95, pp.23~ (1996)
- M. C. Chu, "Damage healing and strengthening behaviour in intelligent mullite", SiC ceramics, 1995, pp.18, 1019~
- M. C. Chu, "Study on strengthening of mullite by dispersion of carbide ceramics particles", Jpn. Soc. Mech. Eng, 60, pp.2829~ (1994)
- K. Ando, "A preliminary study on crack healing behaviour of Si3N4", SiC composite ceramics, 1998, pp.21, 119~
- Y. Z. Zhang, "Crack healing in a silicon nitride ceramics", J. Am. Ceram. Soc, 81, pp.34~ (1998)
- K. Ando, "Fracture from Defects, EFC-12", pp.497~ (1998), Engineering Materials Advisory Services
- K. Ando, "Fatigue properties of crack healed mullite", SiC composite ceramics, 1999, pp.48, 1151~
- K. Ando, "The study on crack healing behavior of silicon nitride ceramics", Jpn. Soc. Mech. Eng, 64, pp.1936~ (1998)
- G. Magnani, "Crack healing in liquid-phase-pressureless-sintered siliconcarbidealuminum nitridecom-posites", J. Eur. Ceram. Soc, 30, pp.769~ (2010)
- K. W. Nam, "Critical crack size of healing possibility of SiC ceramics", Mater. Sci. Eng. A, 527, pp.3236~ (2010)
- W. Nakao, "SiC nanometer sizing effect on self healing ability of structural ceramics", Ceram. Eng. Sci. Proc, pp.137~ (2009)
- P. J. Jorgensen, "Oxidation of silicon carbide", J. Am. Cer. Soc, 42, pp.613~ (1959)
- M. C. Chu, "Crack healing in silicon carbide", J. Am. Cer. Soc, 87, pp.490~ (2004)
- "Ceramic Source, Vol. 6", pp.352~ (1990), American Ceramic Society