کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1601391 1005195 2008 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of microstructure on hydrogen absorption in LaMg2Ni
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Effect of microstructure on hydrogen absorption in LaMg2Ni
چکیده انگلیسی

Hydrogen absorption properties in LaMg2Ni compound are presented. Nanostructured phases have been obtained by crystallisation of an amorphous alloy, in order to study the influence of the microstructure on the absorption/desorption properties. In order to improve absorption kinetic, chemical etching has been also performed. The structural and hydriding properties were examined by X-ray diffraction, thermal analysis and hydrogen pressure-composition. An amorphous phase has been obtained from the LaMg2Ni phase by means of melt spinning technique. Crystallisation occurs in two stages at 500 K and 530 K. After crystallisation, a nanostructured phase has been obtained. Hydrogenation at 443 K leads to the formation of LaMg2NiH7, but at higher temperatures (523 K) LaHX is produced. Hydrogen pressure-composition isotherm of LaMg2Ni at 443 K is presented. The enthalpy of LaMg2Ni hydride formation was measured to be −47 kJ molH−1 by thermal analysis.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Intermetallics - Volume 16, Issue 1, January 2008, Pages 102–106
نویسندگان
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