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 â x)Ni-xFe and Ti-(50 â x)Pd-xFe alloys exhibiting incommensurate diffuse scattering
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volumes 481â482, 25 May 2008, Pages 239-242
Journal: Materials Science and Engineering: A - Volumes 481â482, 25 May 2008, Pages 239-242
نویسندگان
Takuya Yamamoto, Takashi Fukuda, Tomoyuki Kakeshita,