A NEW PHASE IN AL-NI-TI ALLOYS MADE FROM MECHANICALLY ALLOYED POWDERS

Authors
CABANASMORENO JG ITSUKAICHI T UMEMOTO M
Citation
Jg. Cabanasmoreno et al., A NEW PHASE IN AL-NI-TI ALLOYS MADE FROM MECHANICALLY ALLOYED POWDERS, Materials science & engineering. A, Structural materials: properties, microstructure and processing, 182, 1994, pp. 1202-1206
Citations number
14
Categorie Soggetti
Material Science
Journal title
Materials science & engineering. A, Structural materials: properties, microstructure and processing → ACNP
ISSN journal
09215093
Volume
182
Year of publication
1994
Pages
1202 - 1206
Database
ISI
SICI code
0921-5093(1994)182:<1202:ANPIAA>2.0.ZU;2-A
Abstract
A new phase (the ''chi phase'') has been found in Al-Ni-Ti alloys prod uced by mechanical alloying and hot pressing. The structure of this ne w phase is similar to that of the NiTi2 compound (f.c.c., E9(3)) but w ith a lattice parameter of about 1.14-1.15 nm. A variety of additional experiments with alloys produced by arc melting and rapid quenching i ndicate that oxygen contamination (0.5-1.0 wt.%) is responsible for th e occurrence of the new phase. Some suggestions are made regarding the atomic arrangement in the lattice of the chi phase.