Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1582479 | Materials Science and Engineering: A | 2008 | 4 Pages |
Abstract
We have calculated the electronic structure of B2-type Ti-(50 â x)Ni-xFe (0 â¤Â x â¤Â 28 at.%) and Ti-(50 â x)Pd-xFe (0 â¤Â x â¤Â 22 at.%) alloys in order to understand the origin of diffuse scattering appearing in these systems, and the stability of the B2-type structure. For both systems, the Fermi surface of each alloy shows nesting with a sharp peak in the generalized susceptibility Ï(q) at a nesting vector of qn = [ζn ζn 0]2Ï/a. The value of ζn of the peak position decreases linearly as the Fe content increases. In addition, the peak of Ï(q) decreases as the Fe content increases except for Ti-(50 â x)Ni-xFe with x â¤Â 4 at.%. These results suggest that the position of diffuse scattering shifts towards its nearest fundamental reflection of the B2-phase as the Fe content increases and that the stability of the B2-phase increases with increasing Fe content. These suggestions are in good agreement with experimental results reported until now.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Takuya Yamamoto, Takashi Fukuda, Tomoyuki Kakeshita,