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Space-related composite-material experimentsThe preparation of composites in space depends on the immersion of reinforcements in a liquid-metal matrix and their uniform, stable dispersion in the bulk products until solidification occurs. The chief problem in achieving the composite is associated with the 'wetting' of the reinforcements. A study of the theory of wetting revealed that wetting is prevented by the presence of gaseous and oxide contaminants at the interface between the pure liquid and pure solid. Experiment then confirmed that the use of a vacuum environment, cleaning of all surfaces, elevated temperature, ion bombardment, and vigorous mechanical agitation enabled the immersion and dispersion of candidate reinforcements. The technique is limited by the increased tendency for reaction if the time at elevated temperature is extended.
Document ID
19750034519
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Kaye, S.
(General Dynamics Corp. Convair Aerospace Div., San Diego, Calif., United States)
Date Acquired
August 8, 2013
Publication Date
December 1, 1974
Subject Category
Astronautics (General)
Accession Number
75A18591
Funding Number(s)
CONTRACT_GRANT: NAS8-29620
Distribution Limits
Public
Copyright
Other

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