کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1623974 1516414 2008 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermodynamic and kinetic studies of Mg–Fe–H after mechanical milling followed by sintering
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Thermodynamic and kinetic studies of Mg–Fe–H after mechanical milling followed by sintering
چکیده انگلیسی

The transition metal complex hydride Mg2FeH6 has been successfully synthesized utilizing mechanical milling of a 2Mg–Fe mixture followed by heating at 673 K under 6 MPa of hydrogen pressure, without pressing step. The obtained yield of Mg2FeH6 was about 50%. Hydrogen storage properties of the Mg–Fe–H system, i.e. capacities, absorption/desorption kinetics and thermodynamic parameters, were examined. The pressure-composition isotherm (PCI) measurements of the samples at 548–673 K showed that the alloys possessed good cyclic stability and reversibility. Enthalpies and entropies of decomposition of the Mg–Fe–H system were evaluated by van’t Hoff plots. The absorption/desorption rates at 573 K were very fast in comparison with the reported data. The non-isothermal desorption of hydrogen was found greatly dependent on the thermal history of the sample.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 463, Issues 1–2, 8 September 2008, Pages 134–142
نویسندگان
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