Dresden 2006 – wissenschaftliches Programm

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MM: Metall- und Materialphysik

MM 25: Poster Session

MM 25.42: Poster

Mittwoch, 29. März 2006, 15:30–17:30, P4

Smart materials - copper based shape memory alloys a combined x-ray/ellipsometry study — •Yaroslav Filipov, Vasyl Staschuk, and Sergiy Bokoch — Taras Shevchenko Kiev National University, 6 Glushkova Prosp., Kiev 03127, Ukraine

The behavior of some materials which are often called smart materials is related to the structural changes in microscopic scale. One particular class of such materials is the shape-memory alloys (SMA) which exhibit a peculiar property called shape memory effect (SME). The origin of these phenomena lies in the fact that the material changes its internal crystalline structure with changing temperature. Metastable beta-phases of copper-based ternary alloys exhibit this peculiar property and transform from the ordered structures to the long period layered structures martensitically on cooling. Martensitic transformations in shape memory alloys occur by two lattice invariant shears in either of two opposite directions on a 110 plane of parent phase called basal plane of martensite. These planes are subjected to the hexagonal distortion with martensite formation on which atom sizes have important effect. In this work reported results of optical investigation by ellipsometry measurement and structure investigation by x-ray study of copper based SMA with estimated compound Cu83Al16Mn0,7Fe0,3. Finally it should be noted that the reported examinations results provides a useful platform for further advances.