Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1796993 | Journal of Crystal Growth | 2006 | 5 Pages |
Abstract
Single crystals of Co50Ni20FeGa29 with B2 phase have been obtained in a deep supercooling condition. The interface-facets and the segregation effect lead to the formation of ordered defects that store a directional internal stress. These defects give to a large energy barrier that leads to a very sharp martensitic transformation within a temperature window of only 2Â K. The single crystals show good shape memory effect and superelasticity, which are anisotropic between the growth direction [0Â 0Â 1] and its equivalent direction [0Â 1Â 0]. The anisotropic behaviors are attributed to the directional internal stress caused by the ordered defects.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
X.F. Dai, H.Y. Wang, L.J. Chen, X.F. Duan, J.L. Chen, G.H. Wu, Hao Zhu, John Q. Xiao,