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Role of α-SiAlON Nuclei Addition on the Rod-Like Y-Sm α-SiAlON Formation

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Abstract:

In this study, effect of seed addition on the microstructural development of Y-Sm α-SiAlON system has been investigated. Besides using pre-produced rod-like α-SiAlON seeds, growth in the glassy phase and harvested by chemical treatment, powdered Y-Sm/α-SiAlON was also used as nuclei. Microstructural results of both systems were compared with un-seeded samples. It was found that the powdered α-SiAlON addition has also caused the acicular α-SiAlON grain formation, which indicates the dominant effect of thermodynamic stability on the preferential growth of α-SiAlON grains in the c direction.

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Periodical:

Materials Science Forum (Volume 554)

Pages:

101-106

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.554.101

Citation:

Cite this paper

Online since:

August 2007

Authors:

S.R. Kushan, N.C. Acikbas, J. Křest'an, Pavol Šajgalík, Hasan Mandal

Keywords:

Orientation, Seeding, Tape Casting, α-Sialon

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