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JMR Abstracts: September 1998
Article
Microstructure and properties of
nanosemicrystalline Si3N4
ceramics with doped sintering additives: Part II. Phase transformation and
microstructural controlK.H. Ryu, J-M. Yang
(University of California-Los Angeles)
The low
temperature pressureless sintering of a nanosized
Si3N4 powder with doped
sintering additives was investigated. The microstructural evolution
during sintering at different temperatures was analyzed using x-ray
diffraction and scanning electron microscopy. The effect of using
nanosized Si3N4 powder as
a catalyst to accelerate the <>aĆ
b-Si3N4
transformation of a commercial
Si3N4 powder with larger
particle sizes was also investigated. Finally, two stage sintering was
used to study the feasibility of controlling the microstructure and the
mechanical properties of the nanosized silicon nitride.
Order No.:
JA809-034 © 1998 MRS
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