کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1625026 | 1516420 | 2008 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of NiCo2O4 additives on the hydriding properties of magnesium
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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 effect of NiCo2O4 additives on the hydrogen absorption-desorption characteristics of 85Â wt% Mg-15Â wt% NiCo2O4 and 95Â wt% Mg-5Â wt% NiCo2O4 composites prepared by mechanical alloying in an inert atmosphere was investigated. The absorption of hydrogen was measured at temperatures of 573, 473, 423 and 373Â K and pressures of 1, 0.4 and 0.2Â MPa while the desorption studies proceeded at 573Â K under a pressure of 0.15Â MPa. The addition of NiCo2O4 was found to exercise a positive effect on the hydriding kinetics of pure magnesium, the absorption capacity remaining high at temperatures below 573Â K and pressures lower than 1Â MPa. A three-fold decrease of the additive content (from 15 to 5Â wt%) did not deteriorate the hydriding kinetics of the composite. After 85 absorption-desorption cycles the composite 95Â wt% Mg-5Â wt% NiCo2O4 showed no drastic drop in absorption capacity. The favourable absorption-desorption characteristics found for the composites investigated were supposed, on the basis of XPS data, to be due to the catalytic effect of the nickel and cobalt species obtained during hydriding of NiCo2O4 on the sample surface.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 457, Issues 1â2, 12 June 2008, Pages 472-476
Journal: Journal of Alloys and Compounds - Volume 457, Issues 1â2, 12 June 2008, Pages 472-476
نویسندگان
Ts. Mandzhukova, M. Khrussanova, E. Grigorova, P. Stefanov, M. Khristov, P. Peshev,