The effects of pyrolytic carbon interphase thickness on the properties of hot-pressed SiCf/SiC composites
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The effects of pyrolytic carbon interphase (PyC) thickness on the density, microstructure, and mechanical properties of continuous SiC fiber-reinforced SiC composites (SiCf/SiC) have been examined. Electrophoretic deposition combined with ultrasonication was performed to infiltrate a SiC-based matrix phase effectively into the fine voids of a Tyranno-SA SiC fabric preform, which was coated with PyC at thicknesses of 0, 200, 400, 600, and 800 nm. The density of the hot-pressed SiCf/SiC composites decreased with increasing PyC thickness because of the difficulty of matrix-phase infiltration into the fine voids of the preform. SiCf/SiC composites with PyC ≤ 400 nm showed a brittle fracture mode due to the strong fiber-matrix interface, in spite of their relatively high flexural strength. On the other hand, toughened SiCf/SiC composites could be achieved with PyC ≥ 600 nm because of the formation of a weak interface, in spite of their decreased flexural strength.
Abstract
The effects of pyrolytic carbon interphase (PyC) thickness on the density, microstructure, and mechanical properties of continuous SiC fiber-reinforced SiC composites (SiCf/SiC) have been examined. Electrophoretic deposition combined with ultrasonication was performed to infiltrate a SiC-based matrix phase effectively into the fine voids of a Tyranno-SA SiC fabric preform, which was coated with PyC at thicknesses of 0, 200, 400, 600, and 800 nm. The density of the hot-pressed SiCf/SiC composites decreased with increasing PyC thickness because of the difficulty of matrix-phase infiltration into the fine voids of the preform. SiCf/SiC composites with PyC ≤ 400 nm showed a brittle fracture mode due to the strong fiber-matrix interface, in spite of their relatively high flexural strength. On the other hand, toughened SiCf/SiC composites could be achieved with PyC ≥ 600 nm because of the formation of a weak interface, in spite of their decreased flexural strength.
참고문헌 (20)
- S. J. Dapkunas, , Am. Ceram. Soc. Bull, 67, pp.388~391 (1988)
- P. Baldus, , Science, 285, pp.699~703 (1999)
- R. J. Kerans, , Scripta Mater, 32, pp.505~509 (1995)
- B. Riccardi, , J. Nucl. Mater, 329-333, pp.56~65 (2004)
- Y. Hirohata, , Fus. Eng. Des, 61-62, pp.699~704 (2002)
- T. Ishikawa, , Nature, 391, pp.773~775 (1998)
- R. Yamada, , J. Nucl. Mater, 283-287, pp.574~578 (2000)
- K. Yoshida, , Compos. Sci. Technol, 61, pp.1323~1329 (2001)
- T. Taguchi, , J. Phys. Chem. Solids, 66, pp.576~580 (2005)
- A. Ortona, , Fusion Eng. Des, 51-52, pp.159~163 (2000)
- 길건영, "Densification of SiCf", SiC composites by electrophoretic infiltration combined with ultrasonication, 2011, pp.12(4), 371~375[DOI]
- S.P. Lee, , Fus. Eng. Des, 61-62, pp.717~722 (2002)
- Y. Katoh, , Fus. Eng. Des, 61-62, pp.723~731 (2002)
- 이종현, "Dispersion stability and its effect on tape casting of solvent-based SiC slurries", Journal of Ceramic Processing Research, 10(3), pp.301~307 (2009), 세라믹공정연구센터
- 이종현, "Fabrication of SiCf", SiC Composites using an Electrophoretic Deposition, 2009, pp.46(5), 447~451[DOI]
- P. Yonathan, , Mater. Res. Bull, 44, pp.2116~2122 (2009)
- I. Warshaw, , J. Am. Ceram. Soc, 42, pp.434~438 (1959)
- J. S. Abell, , J. Mater. Sci, 9, pp.527~537 (1974)
- J. L. Caslavsky, , J. Mater. Sci, 15, pp.1709~1718 (1980)
- A. M. Kueck, , J. Eur. Ceram. Soc, 28, pp.2259~2264 (2008)