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Studies on the reactive melt infiltration of silicon and silicon-molybdenum alloys in porous carbonInvestigations on the reactive melt infiltration of silicon and silicon-1.7 and 3.2 at percent molybdenum alloys into porous carbon preforms have been carried out by process modeling, differential thermal analysis (DTA) and melt infiltration experiments. These results indicate that the initial pore volume fraction of the porous carbon preform is a critical parameter in determining the final composition of the raction-formed silicon carbide and other residual phases. The pore size of the carbon preform is very detrimental to the exotherm temperatures due to liquid silicon-carbon reactions encountered during the reactive melt infiltration process. A possible mechanism for the liquid silicon-porous (glassy) carbon reaction has been proposed. The composition and microstructure of the reaction-formed silicon carbide has been discussed in terms of carbon preform microstructures, infiltration materials, and temperatures.
Document ID
19930003210
Document Type
Conference Paper
Authors
Singh, M. (NASA Lewis Research Center Cleveland, OH, United States)
Behrendt, D. R. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 6, 2013
Publication Date
September 1, 1992
Subject Category
NONMETALLIC MATERIALS
Report/Patent Number
NAS 1.15:105860
E-7320
NASA-TM-105860
Meeting Information
Annual Meeting of the American Ceramic Society(Minneapolis, MN)
Funding Number(s)
PROJECT: RTOP 537-04-10
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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