کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9803230 | 1516463 | 2005 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The effect of hydrogen pressure and temperature on kinetics of hydrogen-induced direct phase transformation in hard magnetic alloy
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
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چکیده انگلیسی
The kinetics of hydrogen-induced direct phase transformations in the Nd15Fe77B8 hard magnetic alloy has been investigated. It has been determined that, as the temperature and the hydrogen pressure increase, a phase transformation significantly accelerates. According to the Johnson-Mehl-Avrami model the equations describing the isothermal kinetic diagrams for these transformations have been deduced. It has been shown that the kinetics of the phase transformation is controlled by the Fe-atoms diffusion. An increase of hydrogen pressure results in an increase in the free energy of the NdH2 hydride formation and this is the main factor in accelerating a hydrogen-induced direct phase transformation evolution in the Nd2Fe14B type alloys.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volumes 404â406, 8 December 2005, Pages 351-354
Journal: Journal of Alloys and Compounds - Volumes 404â406, 8 December 2005, Pages 351-354
نویسندگان
V.A. Didus, S.B. Rybalka, E.V. Dodonova, V.A. Goltsov,