کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9803275 | 1516464 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis and structural properties of Nd3âxYxFe27.5Ti0.8Mo0.4(0 ⩽ x ⩽ 1.8) and Nd3âxâ²Yxâ²Fe27.8Mo1.2(0 < xâ²Â ⩽ 2.8) intermetallic compounds
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Alloys with compositions Nd3âxYxFe27.5Ti0.8Mo0.4 (0 ⩽ x ⩽ 1.8) and Nd3âxâ²Yxâ²Fe27.8Mo1.2 (0 < xâ²Â ⩽ 2.8) have been synthesized and studied by means of X-ray powder diffraction and neutron powder diffraction. Rietveld analysis of XRD patterns reveals that the two series of compounds crystallize in monoclinic system with space group A2/m. It is found that higher starting yttrium content will make the synthesis of the Nd3âxYxFe27.5Ti0.8Mo0.4 and Nd3âxâ²Yxâ²Fe27.8Mo1.2more difficult. Substitution of Y for Nd leads to a contraction of the unit-cell volume and lattice parameters. The crystallographic structures and element site occupancies have been determined by neutron and X-ray powder diffraction and the results show that Ti and Mo prefer to occupy a 4g site and two 4i sites while Y prefers to enter the 4i sites, which are dominated by the site sizes or thermodynamics effects.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 403, Issues 1â2, 10 November 2005, Pages 168-175
Journal: Journal of Alloys and Compounds - Volume 403, Issues 1â2, 10 November 2005, Pages 168-175
نویسندگان
S.B. Han, J.Y. Lv, X.F. Liu, J. Peng, D.F. Chen, Y.J. Xue, J.H. Li, Z.B. Hu,