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

Mikinori Hotta; Naoya Enomoto; Junichi Hojo

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

Paper Titles

Sol-Gel Preparation and Characterizations of Europium-Ion Doped Barium Magnesium Aluminate
p.93

Syntheses of Bulky Y-Zeolite by Hydrothermal Hot-Pressing (HHP) Technique
p.97

Densification and Strengthening of Tricalcium Phosphate/Titania Composite by Hot Pressing
p.101

Preparation of Mullite Composite Using Liquid Infiltration Technique
p.105

Liquid-Phase Sintered Silicon Carbide with Aluminum Nitride and Rare-Earth Oxide Additives
p.111

Effect of α-Alumina as a Seed in Alumina/Silicon Carbide Composites
p.115

Preparation and Morphology of C/C-SiC Composites by Si Melt Infiltration
p.119

Preparation and Properties of Silicon Nitride Ceramics by Nitrided Pressureless Sintering (NPS) Process
p.125

Microwave Sintering BaTiO₃ Ceramics Using Liquid Phase Sintering
p.131

HomeKey Engineering MaterialsKey Engineering Materials Vols. 317-318Liquid-Phase Sintered Silicon Carbide with...

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

Abstract:

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.

You might also be interested in these eBooks

View Preview

Info:

Periodical:

Key Engineering Materials (Volumes 317-318)

Pages:

111-114

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.317-318.111

Citation:

Cite this paper

Online since:

August 2006

Authors:

Mikinori Hotta, Naoya Enomoto, Junichi Hojo

Keywords:

Flexural Strength, Liquid Phase Sintering (LPS), Microstructure, Silicon Carbide (SiC), Spark Plasma Sintering (SPS)

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

Citation:

References

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

Google Scholar

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

Google Scholar

[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.

Google Scholar

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

Google Scholar

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

Google Scholar

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

Google Scholar

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

Google Scholar

[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

Google Scholar

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

Google Scholar

[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].

Google Scholar