Role of α-SiAlON nuclei addition on the rod-like Y-Sm α-SiAlON formation


Kushan S., Acikbas N., Krestan J., Sajgalik P., MANDAL H.

5th International Symposium on Nitrides, Eskişehir, Turkey, 3 - 05 April 2006, vol.554, pp.101-106 identifier

  • Publication Type: Conference Paper / Full Text
  • Volume: 554
  • Doi Number: 10.4028/0-87849-439-1.101
  • City: Eskişehir
  • Country: Turkey
  • Page Numbers: pp.101-106
  • Keywords: Orientation, Seeding, Tape casting, α-SiAlON
  • Anadolu University Affiliated: Yes

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.