Chapter 76. Engineering Scale Development of the Vapor-Liquid-Solid (VLS) Process for the Production of Silicon Carbide Fibrils
- John B. Wachtman Jr.
Published Online: 28 MAR 2008
Copyright © 1993 The American Ceramic Society
Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 7/8
How to Cite
Hollar, W. E., Demunda, G. P., Kim, J. J. and Mills, W. H. (2008) Engineering Scale Development of the Vapor-Liquid-Solid (VLS) Process for the Production of Silicon Carbide Fibrils, in Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 7/8 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314180.ch76
- Published Online: 28 MAR 2008
- Published Print: 1 JAN 1993
Print ISBN: 9780470375266
Online ISBN: 9780470314180
The Carborundum Company has been exploring the feasibility of scale-up of the VLS process for producing SiC fibrils under a DOE sponsored program administered by Oak Ridge National Laboratory. Efforts have been focused in two areas. Most of the effort has been devoted to determine the process parameters that control the scaleup of the synthesis process. Since the synthesis process dominates the fibril production cost and would determine the success or failure of process scaleup, this area merits detailed understanding. The value of the scaleup data is maximized when placed in a form useful for the reactor design and process development studies. Towards this end, a simulation model has been developed to consolidate the scaleup data. This model incorporates experimental kinetic data. Preliminary comparison of experimental and model data has been evaluated. The model can predict the effect of process conditions on fibril growth rate with a single set of rate constants.
The remainder of the program has focused on other areas of the fibril production process which have the potential to impact the process viability. Development efforts have included evaluation of the impact of post-processing on yield and product characteristics.
This paper will update the status of process development efforts, and a summarize critical data required for successful process scaleup.