کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1601248 1005190 2010 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Hydrogenation behavior of the solid solutions RE4NiMg1−xAlx and RE4−yNiMg1+y with RE = Gd and Y
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Hydrogenation behavior of the solid solutions RE4NiMg1−xAlx and RE4−yNiMg1+y with RE = Gd and Y
چکیده انگلیسی
The solid solutions RE4NiMg1−xAlx (0 < x < 0.9) and RE4−yNiMg1+y (0 < y < 0.5) with RE = Gd and Y were synthesized from the elements in sealed tantalum ampoules in an induction furnace. The limit of solubility was established in both cases. All the samples crystallize with the cubic Gd4RhIn type structure, space group F-43m. The solubility is much lower in the case of Y than for Gd which is linked with steric effects. The hydrogen sorption is irreversible and the large exothermicity of the reaction can lead to the decomposition of the compounds into rare earth hydrides and metallic Ni and Mg. Nevertheless, it is shown that the Y based compounds can absorb almost 3 wt.% of hydrogen at room temperature and under moderate pressure. Furthermore, the solid solutions do not allow destabilization of the hydrides.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Intermetallics - Volume 18, Issue 6, June 2010, Pages 1115-1121
نویسندگان
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