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A Study of Grain Growth and Microstructure Control in Silicon Nitride by Computer Simulation

Published online by Cambridge University Press:  10 February 2011

Y. Okamoto ,
N. Hirosaki  and
H. Matsubara
Y. Okamoto
Affiliation:
Synergy Ceramics Research Laboratory, Fine Ceramics Research Association 2-4-1, Mutsuno, Atsuta-ku, Nagoya-shi, Aichi-ken 456-8587, Japan
N. Hirosaki
Affiliation:
Synergy Ceramics Research Laboratory, Fine Ceramics Research Association 2-4-1, Mutsuno, Atsuta-ku, Nagoya-shi, Aichi-ken 456-8587, Japan
H. Matsubara
Affiliation:
Synergy Ceramics Research Laboratory, Fine Ceramics Research Association 2-4-1, Mutsuno, Atsuta-ku, Nagoya-shi, Aichi-ken 456-8587, Japan
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Abstract

A grain growth simulation technique is developed for microstructure design of ceramic materials by extending the Potts model. The simulation model has successfully reproduced the self-reinforced microstructure which is peculiar to silicon nitride, consists of large elongated grains and small equiaxed grains.

To control the microstructure of silicon nitride further, a seeding technique is effective and often employed. Grain growth behavior of seed particles in the simulation is studied. It is found that the seed grains grow with a relatively high growth rate during the early stage of grain growth. In contrast in the later stage, the difference between microstructures with and without seed particles decreases. This behavior agrees well with that of actual silicon nitride. These results demonstrate the consistency of the simulation.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 538: Symposium J – Multiscale Modelling of Materials , 1998 , 251
Copyright
Copyright © Materials Research Society 1999

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