کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1627079 | 1516446 | 2007 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Formation mechanism of Sr2AlH7
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The mixtures of commercial SrH2 and Al powders were ball milled under hydrogen at a rotation speed of 150Â rpm for different time. The ball milled products could not be further hydrogenated to Sr2AlH7. In the case of ball milling of Sr2Al alloy under hydrogen at a rotation speed of 150Â rpm for 10Â h, however, the milled product consisting of SrH2 and Al can be easily hydrogenated to the Sr2AlH7 hydride at 533Â K for 2 days. SEM and TEM observations demonstrated that the Al particles in the ball milled 2SrH2Â +Â Al mixtures were agglomerative and the average size of the Al particles was of the order of 100Â nm. In the ball milled Sr2Al alloy, however, the Al particles were dispersive and the average particle size was about 10Â nm. The different microstructures were considered to be the most important factor in affecting the kinetics of hydrogenation reaction, which is the reason for the distinct hydrogenation characteristics.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 427, Issues 1â2, 16 January 2007, Pages 153-159
Journal: Journal of Alloys and Compounds - Volume 427, Issues 1â2, 16 January 2007, Pages 153-159
نویسندگان
Q.A. Zhang, H. Enoki, E. Akiba,