Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1609323 | Journal of Alloys and Compounds | 2015 | 6 Pages |
Abstract
The thermal, magnetic and magnetocaloric properties of amorphous Fe80âxMxB10Zr9Cu1 (M = Ni or Ta; x = 0, 3, and 5) alloys were investigated. Both Ni and Ta additions reduce the crystallization temperature (Tx1). The Curie temperature (TC) can be increased or decreased by the addition of Ni or Ta, respectively. The saturation magnetization (MS) decreases from 126.5 Am2 kgâ1 (without Ni or Ta) to 83.5 or 29.4 Am2 kgâ1 for 5 at.% Ni or Ta addition, respectively. The maximum magnetic entropy change (âÎSM)max of the amorphous alloys shows a decline trend with increasing Ni or Ta content. Under an applied magnetic field change of 5 T, the (âÎSM)max for Fe80âxNixB10Zr9Cu1 with x = 0, 3, and 5 are 3.28, 3.13, and 3.04 J kgâ1 Kâ1, respectively, while the (âÎSM)max for Fe80âxTaxB10Zr9Cu1 with x = 3 and 5 are 2.84 and 2.03 J kgâ1 Kâ1, respectively. The values of refrigeration capacity (RC) for the experimental alloys are higher than those of Fe80âxGdxCr8B12 (x = 5 and 10) alloys. In particular, the RC for the Fe80âxNixB10Zr9Cu1 (x = 3 and 5) and Fe77Ta3B10Zr9Cu1 alloys are comparable to that of the well-known MCM crystalline Gd5Si2Ge2. With large RC, negligible hysteresis and good thermal stability, these alloys can be used as the high temperature magnetic refrigerants working in the temperature range of 330-410 K.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
X.C. Zhong, H.C. Tian, S.S. Wang, Z.W. Liu, Z.G. Zheng, D.C. Zeng,