کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1517147 | 1511581 | 2010 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Homogeneity range and crystal structure of Ni substituted Mg6(Pd,Ni) complex intermetallic compounds
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
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چکیده انگلیسی
The solubility of nickel in Mg6Pd compound has been studied by chemical and structural methods. The solubility limit at 673Â K attains 9Â at% Ni, i.e. more than four times the value previously reported. Therefore, a re-determination of the ternary Mg-Pd-Ni phase diagram in the Mg-rich corner is desirable. Mg6(Pd,Ni) compounds have the same crystal structure as the binary Mg6Pd compound. The unit-cell composition at the solubility limit is Mg344(2)Pd12(1)Ni36(1) with 75% of Ni atoms substituting Pd ones. Ni substitution occurs on the three crystallographic sites exclusively occupied by Pd in Mg6Pd. The substitution is not fully random. Ni atoms have a slight preference for site with low coordination number. The results reported here enlarge the compositional range in which Mg6(Pd,Ni) compounds can be used as reversible hydrogen storage materials.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Physics and Chemistry of Solids - Volume 71, Issue 9, September 2010, Pages 1259-1263
Journal: Journal of Physics and Chemistry of Solids - Volume 71, Issue 9, September 2010, Pages 1259-1263
نویسندگان
F. Cuevas, J.F. Fernández, J.R. Ares, F. Leardini, C. Sánchez,