Liquid-Phase Sintered Silicon Carbide with Aluminum Nitride and Rare-Earth Oxide Additives

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SiC was sintered with AlN and Y2O3 as sintering additives by spark plasma sintering (SPS). Using nano-sized β-SiC powder as the starting material, the sintered density reached about 95% of theoretical at 1800-2000oC for 10min. The β to α phase transformation of SiC was not found by XRD. The secondary phase such as Y2O3 decreased as the firing temperature was elevated, and β-SiC monophase was identified at 2000oC. It seems that the residual intergranular glassy phase is present between the SiC grains. Significant SiC grain growth was observed at 1800-1900oC by SEM. The grain size decreased with increasing amount of AlN additive. The maximum value of flexural strength of the sample reached approximately 800MPa. These results are discussed on the basis of the liquid-phase sintering mechanism in AlN-Y2O3 and Al2O3-Y2O3 systems.

Info:

Periodical:

Key Engineering Materials (Volumes 317-318)

Edited by:

T. Ohji, T. Sekino and K. Niihara

Pages:

111-114

DOI:

10.4028/www.scientific.net/KEM.317-318.111

Citation:

M. Hotta et al., "Liquid-Phase Sintered Silicon Carbide with Aluminum Nitride and Rare-Earth Oxide Additives", Key Engineering Materials, Vols. 317-318, pp. 111-114, 2006

Online since:

August 2006

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$35.00

[1] M.A. Mulla and V.D. Krstic: Am. Ceram. Soc. Bull. Vol. 70 (1991), p.439.

[2] M.A. Mulla and V.D. Krstic: J. Mater. Sci. Vol. 29 (1994), p.934.

[3] M. Keppeler, H. -G. Reichert, J.M. Broadley, G. Thurn, I. Wiedmann and F. Aldinger: J. Eur. Ceram. Soc. Vol. 18 (1998), p.521.

[4] N.P. Padture: J. Am. Ceram. Soc. Vol. 77 (1994), p.519.

[5] Y. -W. Kim, M. Mitomo and T. Nishimura: J. Am. Ceram. Soc. Vol. 85 (2002), p.1007.

[6] H. -J. Choi, J. -G. Lee and Y. -W. Kim: J. Am. Ceram. Soc. Vol. 85 (2002), p.2281.

[7] G. Rixecker, I. Wiedmann, A. Rosinus and F. Aldinger: J. Eur. Ceram. Soc. Vol. 21 (2001), p.1013.

[8] V.A. Izhevskyi, L.A. Genova, A.H.A. Bressiani and J.C. Bressiani: International Journal of Refractory Metals and Hard Materials Vol. 19 (2001), p.409.

DOI: 10.1016/s0263-4368(01)00015-4

[9] A. Zangvil and R. Ruh: J. Am. Ceram. Soc. Vol. 71 (1988), p.884.

[10] Y. -W. Kim, M. Mitomo and T. Nishimura: J. Am. Ceram. Soc. Vol. 84 (2001), p.2060 9A1Y 7A3Y 5A5Y 3A7Y 1A9Y 0 200 400 600 800 1000 Flexural strength [MPa].

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