کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1501970 993401 2009 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
On the nucleation step in the Mg–MgH2 phase transformation
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
On the nucleation step in the Mg–MgH2 phase transformation
چکیده انگلیسی

Scanning electron microscopy was used to support kinetic analysis in order to ascertain the physical mechanisms involved in the Mg–MgH2 phase transformation. Kinetic asymmetry in hydrogen absorption and desorption was explained by the different requirements for fast nucleation in the two reactions. In particular, MgH2 nucleation in Mg is assisted by crystal defects, while free surface is the only nucleation site in the reverse reaction. This explains, for the first time, the different role of the metal catalyst in the two reactions.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Scripta Materialia - Volume 61, Issue 11, December 2009, Pages 1064–1067
نویسندگان
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