J. Phys. IV France 11 (2001) Pr8-345-Pr8-350
Structure of melt spun Ni25Ti50Cu25 ribbons studied by X-ray diffractionT. Goryczka1, M. Karolus1, P. Ochin2 and H. Morawiec1
1 Institute of Physics and Chemistry of Metals, University of Silesia, Bankowa 12, 40-07 Katowice, Poland
2 CECN, CNRS, 94497 Vitry-sur-Seine, France
Structure and transformation behaviour in NiTiCu melt spun ribbons has been investigated. The sbuctures of amorphous end heattreated ribbons were fitted using Rietveld refinement. After crystallisation, the following transformation sequence : B2->B19+B19' was found. The fractions of B19 and B19' phases in a mixture is equal 84 wt% 16 wt%, respectively. Quenching and annealing causes shifts in characteristic temperatures. The precipitation process is mainly responsible for the changes in the transformation course.
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