Microstructure development in hot-pressed silicon carbide: Effects of aluminum, boron, and carbon additives
SiC was hot-pressed with aluminum, boron, and carbon additives. The Al content was modified either to obtain SiC samples containing a continuous Al gradient, or to vary the average Al content. In both cases, dramatic changes in microstructure, phase composition, and grain boundary structure were observed as a result of the Al variation. Similar processing and characterization were done with modified boron and carbon average contents. The systematic experiments allowed identification of the roles of Al, B, and C in developing grain morphology and phase composition. The experiments also clarified the mechanical property responses to microstructural modification. Tailoring of the SiC microstructure to suit different applications would be possible.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Director, Office of Science. Office of Basic Energy Sciences. Materials Sciences Division (US)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 823735
- Report Number(s):
- LBNL-51914; R&D Project: 512301; TRN: US200415%%618
- Journal Information:
- Acta Materialia, Vol. 51, Issue 13; Other Information: Journal Publication Date: 08/01/2003; PBD: 18 Dec 2002; ISSN 1359-6454
- Country of Publication:
- United States
- Language:
- English
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