Please use this identifier to cite or link to this item: doi:10.22028/D291-23812
Title: Preliminary investigation of a NiAl composite prepared by cryomilling
Author(s): Whittenberger, J. Daniel
Arzt, Eduard
Luton, Michael J.
Language: English
Year of Publication: 1990
OPUS Source: Journal of materials research. - 5. 1990, 2, S. 271-277
SWD key words: Mechanische Eigenschaft
DDC notations: 620 Engineering and machine engineering
Publikation type: Journal Article
Abstract: An attempt has been made to improve the high temperature mechanical strength of the B2 cubic crystal structure intermetallic NiAl by dispersion strengthening. Prealloyed Ni-51 (at.%) Al was cryomilled with a Y2O3 addition to form an yttria dispersoid within the intermetallic matrix. Following milling, the powder was hot extruded to full density and machined into test coupons. Compression testing between 1200 and 1400 K indicated that the cryogenic process yielded the strongest NiAl based material tested to date: creep resistance was six times better than NiAl and twice that of a NiAl particulate composite containing 10 vol.% TiB2. Surprisingly, transmission electron microscopy revealed that the second phase was inhomogeneously distributed. Furthermore, x-ray analysis indicated that the second phase was not Y2O3 but rater AlN.
Link to this record: urn:nbn:de:bsz:291-scidok-17538
Date of registration: 17-Nov-2008
Faculty: SE - Sonstige Einrichtungen
Department: SE - INM Leibniz-Institut für Neue Materialien
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