Role of alpha-SiAlON nuclei addition on the rod-like y-sm alpha-SiAlON formations

Kushan S. R., Acikbas N. C., Krestan J., Sajgalik P., Mandal H.

5th International Symposium on Nitrides, Eskişehir, Turkey, 3 - 05 April 2006, vol.554, pp.101-103 identifier

  • Publication Type: Conference Paper / Full Text
  • Volume: 554
  • Doi Number: 10.4028/www.scientific.net/msf.554.101
  • City: Eskişehir
  • Country: Turkey
  • Page Numbers: pp.101-103
  • Keywords: alpha-SiAlON, tape casting, orientation, seeding, MECHANICAL-PROPERTIES, GRAIN MORPHOLOGY, CERAMICS, MICROSTRUCTURE, SEEDS
  • Anadolu University Affiliated: Yes

Abstract

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