Please use this identifier to cite or link to this item: doi:10.22028/D291-24007
Title: 1300-K compressive properties of a reaction milled NiAl-AlN composite
Author(s): Whittenberger, J. Daniel
Arzt, Eduard
Luton, Michael J.
Language: English
Year of Publication: 1990
OPUS Source: Intermetallic matrix composites : symposium held April 18 - 20, 1990, San Francisco, California, U.S.A.. - Pittsburgh, Pa. : Materials Research Soc., 1990. - (Materials Research Society symposium proceedings ; 194), S. 211-218
SWD key words: Kristallstruktur
DDC notations: 620 Engineering and machine engineering
Publikation type: Conference Paper
Abstract: Cryomilling (high intensity mechanical ball milling in aliquid nitrogen bath) of the B2 crystal structure nickel aluminide leads to a NiAl-AlN composite containing about 10 vol pct second phase which is dispersed as very small diameter (<50 nm) AlN particles in a mantle surrounding particle-free NiAl grains. The AlN particles are the result of reaction milling, where nitrogen incorprated into the matrix during cryomilling reacts with Al during subsequent thermomechanical processing to form a composite. Compressive testing at 1300 K of such materials densified by either hot extrusion or hot isostatic pressing have indicated that strengh at relatively fast strain rates. In addition deformation at 1300 K occurs by two distinct mechanism, where at high strain rates the stress exponent is greater than 13 while at slower rates (<10-7 s-1) a much lower stress exponent (-6) was found.
Link to this record: urn:nbn:de:bsz:291-scidok-20373
Date of registration: 5-Feb-2009
Faculty: SE - Sonstige Einrichtungen
Department: SE - INM Leibniz-Institut für Neue Materialien
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