Coarsening in liquid-phase-sintered {alpha}-SiC
- Univ. of Connecticut, Storrs, CT (United States)
Liquid-phase-sintered (LPS) SiC ceramics represent a new class of microstructurally toughened structural materials. In order to understand better the microstructural evolution in these ceramics, the coarsening kinetics in LPS {alpha}-SiC, containing a yttrium aluminum garnet (YAG) based liquid phase, was studied. It was confirmed that the coarsening occurs primarily by solution-reprecipitation (Ostwald ripening). Most importantly, the SiC grains were found to be faceted in nature, and the coarsening rate was found to be independent of the vol.% liquid in the system or the average diffusion path length. Based on these observations it is inferred that interface-reaction controls the solution-reprecipitation coarsening in LPS SiC.
- OSTI ID:
- 329050
- Journal Information:
- Acta Materialia, Journal Name: Acta Materialia Journal Issue: 2 Vol. 47; ISSN 1359-6454; ISSN ACMAFD
- Country of Publication:
- United States
- Language:
- English
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