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A study of metal-ceramic wettability in SiC-Al using dynamic melt infiltration of SiCPressure-assisted infiltration with a 2014 Al alloy of plain and Cu-coated single crystal platelets of alpha silicon carbide was used to study particulate wettability under dynamic conditions relevant to pressure casting of metal-matrix composites. The total penetration length of infiltrant metal in porous compacts was measured at the conclusion of solidification as a function of pressure, infiltration time, and SiC size for both plain and Cu-coated SiC. The experimental data were analyzed to obtain a threshold pressure for the effect of melt intrusion through SiC compacts. The threshold pressure was taken either directly as a measure of wettability or converted to an effective wetting angle using the Young-Laplace capillary equation. Cu coating resulted in partial but beneficial improvements in wettability as a result of its dissolution in the melt, compared to uncoated SiC.
Document ID
19940035975
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Asthana, R.
(Cleveland State Univ.; NASA, Lewis Research Center OH, United States)
Rohatgi, P. K.
(Wisconsin Univ. Milwaukee, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1993
Publication Information
Publication: In: Advances in metal matrix composites; Proceedings of the International Meeting, Cairo, Egypt, Apr. 13-15, 1992 (A94-12626 02-24)
Publisher: Trans Tech Publications
Subject Category
Chemistry And Materials (General)
Accession Number
94A12630
Distribution Limits
Public
Copyright
Other

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