Effect of composition on the processing and properties of sintered reaction-bonded silicon nitride
- Oak Ridge National Lab., TN (United States); and others
Silicon nitride materials are the leading ceramics for structural applications at elevated temperatures because of their excellent combination of properties. However, cost is the major impediment for the use of silicon nitride in commercial applications. Sintered reaction-bonded silicon nitride (SRBSN) uses silicon powder as the raw material source and is an attractive alternative to the more conventional approaches that begin with Si{sub 3}N{sub 4} powders. Because of the low silicon powder cost, the process is cost-effective compared to the expensive high-purity powders. A significant amount of work on SRBSN has been done since the 1970`s and a large database of information is available. However, within the last 10 years the level of research has been minor. In that same time period, a considerable amount of understanding on silicon nitride processing, microstructure development and property relationships has been established. The purpose of the present study was to examine the current state of SRBSN materials and determine the effect of different silicon precursor powders and different sintering additives on the processing and final mechanical properties.
- DOE Contract Number:
- AC05-96OR22464
- OSTI ID:
- 567547
- Report Number(s):
- CONF-960106--
- Country of Publication:
- United States
- Language:
- English
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