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.
Atomic ordering in CuZnAl shape memory alloys investigated via X-ray absorption and diffraction
AMADORI, STEFANO;PASQUINI, LUCA;BONETTI, ENNIO
2008
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.File in questo prodotto:
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