کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5458845 | 1516167 | 2017 | 28 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Broad first-order magnetic entropy change curve in directionally solidified polycrystalline Ni-Co-Mn-In
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Broad first-order magnetic entropy change curve in directionally solidified polycrystalline Ni-Co-Mn-In Broad first-order magnetic entropy change curve in directionally solidified polycrystalline Ni-Co-Mn-In](/preview/png/5458845.png)
چکیده انگلیسی
We present the thermal dependence of the magnetic entropy change ÎSM(T) across the martensitic transformation for a polycrystalline sample, which was cut from a directionally solidified rod, with a nominal composition Ni42Co8Mn38In12 grown by the Bridgman-Stockbarger technique. This material combines a first-order martensitic transformation expanded over a very large working temperature range with a large magnetization change of â¼86 A m2 kgâ1. Accordingly, for a magnetic field change of 5 T (2 T), the coupled magneto-structural transition gives rise to a broad magnetic entropy change curve across the reverse martensitic transformation with a moderate maximum value of 6.8 (3.0) J kgâ1 Kâ1 and a full-width at half-maximum δTFWHM for the ÎSM(T) curve of 49 (43) K. Such a broad structural transition may be due to the effect of chemical segregation introduced by the directional solidification which can be enhanced by the non-uniform distribution of second phase particles. Accompanying with such a wide working temperature range, a large refrigerant capacity of 334 J kgâ1 was obtained for a field change of 5 T.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 727, 15 December 2017, Pages 603-609
Journal: Journal of Alloys and Compounds - Volume 727, 15 December 2017, Pages 603-609
نویسندگان
F. Chen, Y.X. Tong, L. Li, J.L. Sánchez Llamazares, C.F. Sánchez-Valdés, P. Müllner,