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Strengthening of phosphate ceramic foam by silicon carbide whiskersThe influence of additions of SiC whiskers on the elastic modulus and flexural strength of phosphate ceramic foam is assessed. It is shown that the incorporation into the material composition of even small amounts (2.4 vol%) of SiC whiskers enhances the impact toughness and heat resistance of the ceramic foam. A 12.3 vol% of SiC whiskers leads to a more than threefold increase of the flexural strength. Strengthening of the phosphate ceramic foam is due to the fact that the whiskers hinder the propagation of matrix crack by increasing the work of matrix fracture. The whiskers reinforce only that volume of material which is occupied by solid matter, whereas they do not reinforce the pores.
Document ID
19870016046
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Schetanov, B. V.
(NASA Headquarters Washington, DC United States)
Prilepskiy, V. N.
(NASA Headquarters Washington, DC United States)
Lapidovskaya, L. A.
(NASA Headquarters Washington, DC United States)
Chernyak, A. I.
(NASA Headquarters Washington, DC United States)
Romanovich, I. V.
(NASA Headquarters Washington, DC United States)
Date Acquired
September 5, 2013
Publication Date
July 1, 1987
Subject Category
Nonmetallic Materials
Report/Patent Number
NAS 1.77:20025
NASA-TT-20025
Accession Number
87N25479
Funding Number(s)
CONTRACT_GRANT: NASW-4004
Distribution Limits
Public
Copyright
Public Use Permitted.
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