Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
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Properties of Liquid Phase Sintered SiC Materials Containing $Al_2O_3$ and $Y_2O_3$ Particles

$Al_2O_3$와 $Y_2O_3$ 입자를 함유한 액상소결 SiC 재료의 특성

  • Lee, Sang-Pill (Department of Mechanical Engineering, Dong-Eui University) ;
  • Lee, Moon-Hee (Department of Mechanical Engineering, Dong-Eui University) ;
  • Lee, Jin-Kyung (Department of Mechanical Engineering, Dong-Eui University)
  • Published : 2008.08.28
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Abstract

The mechanical properties of liquid phase sintered (LPS) SiC materials, with the addition of oxide powder, were investigated, in conjunction with a detailed analysis of their microstructures. LPS-SiC materials were fabricated at a temperature of 1820 $^{\circ}C$ under an argon atmosphere, using three different starting sizes of SiC particles. The sintering additive for the fabrication of the LPS-SiC materials was an $Al_2O_3-Y_2O_3$ mixture with a constant composition ratio ($Al_2O_3/Y_2O_3$: 1.5). The particle sizes of the commercial SiC powderswere 30 nm, 0.3 $\mu$m, and 3.0 $\mu$m. The flexural strength of the LPS-SiC materials was also examined at elevated temperatures. A decrease in the starting size of the SiC particles led to an increase in the flexural strength of the LPS-SiC materials, accompanying a highly dense morphology with the creation of a secondary phase. Such a secondary phase was identified as $Y_3Al_2(AlO_4)2$. The flexural strength of the LPS-SiC materials greatly decreased with an increase in the test temperature, due to the creation of a large amount of pores.

Keywords

References

  1. 노상훈, 김부안, 문창권, 정해용, 서원찬, 윤한기 (2007). '$Y_3Al_3O_{12}$ 첨가가 질화규소 세라믹스의 제조 및 그 기계적 특성에 미치는 영향', 제21권, 제6호, 한국해양공학회지, pp 96-100
  2. 윤한기, 정헌채 (2006). 'LPS-SiC 세라믹스의 굽힘강도 특성에 미치는 미시조직 영향', 제20권, 제5호, 한국해양공학회지, pp 77-81
  3. Jones, R.H., Hasegawa, A., Katoh, Y., Kohyama, A., Riccardi, B., Snead, L.L. and Weber, W.J. (2002). 'Promise and Challenges of $SiC_f/SiC$ Composites for Fusion Energy Applications', J. Nucl. Mater. Vol 307-311, pp 1057-1072 https://doi.org/10.1016/S0022-3115(02)00976-5
  4. Katoh, Y., Kohyama, A., Nozawa, T. and Sato, M. (2004). 'SiC/SiC Composites through Transient Eutectic-phase Route for Fusion Applications', J. Nucl. Mater Vol 329-333, pp 587-591 https://doi.org/10.1016/j.jnucmat.2004.04.157
  5. Katoh, Y., Snead, L.L., Henager, C.H. Jr., Hasegawa, A., Kohyama, A., Riccardi, B., and Hegeman, H. (2007). 'Current Status and Critical Issues for Development of SiC Composites for Fusion Applications', J. Nucl. Mater. Vol 367-370, pp 659-671 https://doi.org/10.1016/j.jnucmat.2007.03.032
  6. Lee, S.P., Jin, J.O., Park, J.S., Kohyama, A., Katoh, Y., Yoon, H.K., Bae, D.S. and Kim, I.S. (2004). 'High Temperature Characterization of Reaction Sintered SiC Based Materials', J. Nucl. Mater. Vol 329-333, pp 534-538 https://doi.org/10.1016/j.jnucmat.2004.04.283
  7. Lee, S.P., Shin, Y.S., Bae, D.S., Min, B.H., Park, J.S. and Kohyama, A. (2006). 'Fabrication of Liquid Phase Sintered SiC Materials and their Characterization', Fus. Eng. and Des. Vol 81, Iss 8-14, pp 963-967 https://doi.org/10.1016/j.fusengdes.2005.09.025
  8. Park, J.S., Katoh, Y., Kohyama, A., Lee, J.K., Sha, J.J. and Yoon, H.K. (2004). 'Tailoring the Microtructure of Hot-pressed SiC by Heat Treatment', J. Nucl. Mater. Vol 329-333, pp 558-561 https://doi.org/10.1016/j.jnucmat.2004.04.117
  9. Riccardi, B., Giancarli, L., Hasegawa, A., Katoh, Y., Kohyama, A., Jones, R.H. and Snead, L.L. (2004). 'Issues and Advances in $SiC_f/SiC$ Composites Development for Fusion Reactors', J. Nucl. Mater. Vol 329-333, pp 56-65 https://doi.org/10.1016/j.jnucmat.2004.04.002
  10. Shimoda, K., Park, J.S., Hinoki, T., Kohyama, A. (2008). 'Influence of Pyrolytic Carbon Interface Thickness on Microstructure and Mechanical Properties of SiC/SiC Composites by NITE Process', Compo. Sci. Tech. Vol 68, pp 98-105 https://doi.org/10.1016/j.compscitech.2007.05.037
  11. Suo, J., Chen, Z., Xiao, J. and Zheng, W. (2005). 'Influence of an Initial Hot-press Processing Step on the Mechanical Properties of 3D-C/SiC Composites Fabricated via PIP', Cera. Int. Vol 31, Issue 3, pp 447-452 https://doi.org/10.1016/j.ceramint.2004.06.008
  12. Taguchi, T., lgawa, N., Jitsukawa, S. and Shimura, K. (2006). 'Effect of Implanted Helium on Thermal Diffusivities of SiC/SiC Composites', Nucl. Inst. Meth. Phy. Res. (B). Vol 242, Issue 1-2, pp 469-472 https://doi.org/10.1016/j.nimb.2005.08.126
  13. Yang, W., Araki, H., Kohyama, A., Yang, Q. and Noda, T. (2007). 'Effects of Heat Treatment on the Microstructure and Flexural Properties of CVI - Tyranno-SA/SiC Composite', Cera. Int. Vol 33, Issue 2, pp 141-146 https://doi.org/10.1016/j.ceramint.2005.08.011
  14. Zhu, Y., Huang, Z., Dong, S., Yuan, M. and Jiang, D. (2008). 'Manufacturing 2D Carbon-fiber-reinforced SiC Matrix Composites by Slurry Infiltration and PIP Process', Cera. Int. Vol 34, Issue 5, pp 1201-1205 https://doi.org/10.1016/j.ceramint.2007.02.014