کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1582479 1514875 2008 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electronic structure of B2-type Ti-(50 − x)Ni-xFe and Ti-(50 − x)Pd-xFe alloys exhibiting incommensurate diffuse scattering
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Electronic structure of B2-type Ti-(50 − x)Ni-xFe and Ti-(50 − x)Pd-xFe alloys exhibiting incommensurate diffuse scattering
چکیده انگلیسی
We have calculated the electronic structure of B2-type Ti-(50 − x)Ni-xFe (0 ≤ x ≤ 28 at.%) and Ti-(50 − x)Pd-xFe (0 ≤ x ≤ 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 χ(q) at a nesting vector of qn = [ζn ζn 0]2π/a. The value of ζn of the peak position decreases linearly as the Fe content increases. In addition, the peak of χ(q) decreases as the Fe content increases except for Ti-(50 − x)Ni-xFe with x ≤ 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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volumes 481–482, 25 May 2008, Pages 239-242
نویسندگان
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