Gd-Dy-Al-Co bulk metallic glasses with large magnetic entropy change and refrigeration capacity

被引：20

作者：

Xu, Z. Y. ^{[1
]}

Hui, X. ^{[1
]}

Wang, E. R. ^{[1
]}

Chang, J. ^{[1
]}

Chen, G. L. ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 504卷

关键词：

Magnetocaloric effect; Gd-Dy-Al-Co; Bulk metallic glasses; Refrigeration capacity; EXCELLENT MAGNETOCALORIC PROPERTIES; HIGH THERMAL-STABILITY; RE55AL25CO20; RE; ALLOYS; PR; CE; ND;

D O I：

10.1016/j.jallcom.2010.03.012

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Novel Gd56-xDyxAl24Co20 (x = 0, 14, 17) bulk metallic glasses (BMGs) were prepared by copper mold casting. They exhibit magnetic entropy changes (Delta S-M) comparable to that of Gd53Al24Co20Zr3 BMG and crystalline Gd. Moreover, these glassy alloys have broad entropy change peaks, resulting in the refrigeration capacities of 751.4 J kg(-1), 702.8 J kg(-1), and 682.3 J kg(-1) for Gd56Al24Co20, Gd42Dy14Al24Co20, and Gd39Dy17Al24Co20 at 5 Tesla. The large magnetocaloric effect makes these BMGs attractive candidates as magnetic refrigerant in temperature range of 50-140 K. It is also found that the Curie temperature of this kind of metallic glass linearly declines with the increase of Dy. The Delta S-M of metallic glasses reaches maximum at certain content of Dy. These findings are expected to provide a meaningful guidance for the composition design of rare earth based glassy alloys for refrigeration application. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：S146 / S149

页数：4

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