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U.S. Department of Energy
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Engineering-scale development of the vapor-liquid-solid (VLS) process for the production of silicon carbide fibrils

Conference ·
OSTI ID:140113
 [1];  [2]
  1. Carborundum Company, Niagara Falls, NY (United States)
  2. BP Research, Warrensville, OH (United States)
The Phase 1 portion of the development program has been completed. Under this program the following milestones were achieved: (1) successful transfer of the Los Alamos National Laboratory process technology to Carborundum, (2) evaluation of key fibril synthesis scaleup parameters, (3) development of a computer model which simulates reactor performance, (4) development of a process gas recycle system, (5) evaluation of beneficiation processes for fibrils of various lengths. Significant results and conclusions from this program are discussed. VLS SiC fibrils will be used as a reinforcement in ceramic matrix composite (CMC) applications. The long length of the fibrils relative to standard SiC whisker materials could allow the fibrils to behave similarly to continuous fibers. This, combined with the excellent thermal and mechanical properties of the VLS SiC fibril, could lead to high-temperature ceramic matrix composites based on the fibril. A manufacturing process for converting the fibrils into well-aligned, high-volume fraction yarns will be required to achieve this goal. Fibril characteristics and potential process concepts for successful yarn forming are discussed.
Research Organization:
Oak Ridge National Lab., TN (United States)
OSTI ID:
140113
Report Number(s):
ORNL/FMP--93/1; CONF-9305135--; ON: DE94001091
Country of Publication:
United States
Language:
English