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.
G.Ciatto, P.L.Solari, S. De Panfilis, A.L. Fiorini, S.Amadori, L.Pasquini , et al. (2008). Atomic ordering in CuZnAl shape memory alloys investigated via X-ray absorption and diffraction. APPLIED PHYSICS LETTERS, 92, 249103-1-249103-3 [10.1063/1.2943150].
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
