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Author Hixson, R. S. ♦ Johnson, J. N. ♦ Gray, G. T. III ♦ Price, J. D.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ COMPOSITE MATERIALS ♦ SPALLATION ♦ INCLUSIONS ♦ BONDING ♦ ALUMINIUM ♦ CERAMICS ♦ COMPRESSION ♦ HIGH PRESSURE ♦ COPPER ♦ NIOBIUM ♦ IMPACT SHOCK ♦ FRACTURES
Abstract Two metal-matrix composite systems are studied to determine the influence of inclusions on the spallation strength in plate-impact experiments. The first is an aluminum/ceramic system with several volume fractions of ceramic inclusion, and the second is a copper/niobium composite consisting of 15 vol. {percent} niobium particles embedded in the copper matrix. Plate-impact experiments produce peak compressive stresses of {approximately}5 GPa in the aluminum/ceramic system and {approximately}10 GPa in the copper/niobium system. The characteristic code CHARADE is used to calculate detailed compression-release profiles in the composite systems, thus accurately quantifying the wave-evolution occurring between the spall plane and the particle velocity (VISAR) measurement at the rear free surface. The aluminum/ceramic system exhibits a strong dependence of the spall strength on inclusion concentration and morphology. In the case of the copper/niobium system, the spall strength remains essentially unchanged by the presence of 15 vol. {percent} niobium particles embedded in the copper matrix. {copyright} {ital 1996 American Institute of Physics.}
ISSN 0094243X
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-05-01
Publisher Place United States
Volume Number 370
Issue Number 1
Technical Publication No. CONF-950846-


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