We investigate the structure of the austenite phase in CuZnAl shape memory alloys by a combined x-ray absorption and diffraction analysis. Ab initio simulations of the near Zn-edge x-ray absorption coefficient allows us directly discard the hypothesis of a DO3 superstructure. At the same time we give evidence of the existence of an ordered structure ( B2 like) different from the L21 one recently proposed by neutron diffraction.
Titolo: | Atomic ordering in CuZnAl shape memory alloys investigated via X-ray absorption and diffraction |
Autore/i: | G. Ciatto; P. L. Solari; S. De Panfilis; A. L. Fiorini; AMADORI, STEFANO; PASQUINI, LUCA; BONETTI, ENNIO |
Autore/i Unibo: | |
Anno: | 2008 |
Rivista: | |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1063/1.2943150 |
Abstract: | We investigate the structure of the austenite phase in CuZnAl shape memory alloys by a combined x-ray absorption and diffraction analysis. Ab initio simulations of the near Zn-edge x-ray absorption coefficient allows us directly discard the hypothesis of a DO3 superstructure. At the same time we give evidence of the existence of an ordered structure ( B2 like) different from the L21 one recently proposed by neutron diffraction. |
Data prodotto definitivo in UGOV: | 2008-11-26 12:34:23 |
Appare nelle tipologie: | 1.01 Articolo in rivista |
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