Effect of Dy, Ho, and Er substitution on the magnetocaloric properties of Gd-Co-Al-Y high entropy bulk metallic glasses
| Autor: | Li-Zhuang Chen, Juntao Huo, Zhuwei Lv, Hui Xu, Xun-Li Wang, W. Guo, M.J. Cai, C.C. Yuan, Baolong Shen, C.M. Pang |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Amorphous metal
Materials science Mechanical Engineering High entropy alloys Exchange interaction Metals and Alloys Thermodynamics 02 engineering and technology Atmospheric temperature range 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Transition metal Mechanics of Materials Materials Chemistry Magnetic refrigeration Thermal stability 0210 nano-technology Supercooling |
| Zdroj: | Journal of Alloys and Compounds. 827:154101 |
| ISSN: | 0925-8388 |
| Popis: | Glass-forming ability, thermal stability and magnetocaloric properties of Gd25Co25Al25Y25 and Gd25Co25Al25Y15RE10 (RE = Dy, Ho, and Er) high entropy metallic glasses are evaluated. With the substitution of Y by adjacent heavy rare earth elements, i.e., Dy, Ho, or Er, the critical dimension (Dc), the width of the supercooled liquid region, magnetic entropy changes (| Δ S M |) and refrigeration capacity (RC) increase obviously. However, the magnetic transition temperature (TC) almost keeps constant around 40 K, which may be attributed to the exchange interaction between Y and transition metal or other rare earth elements. Among resulting Gd25Co25Al25Y15RE10 metallic glasses, the peak values of | Δ S M | and RC can be improved from 6.76 to 7.35 Jkg−1K−1and 424 to 488 Jkg-1 when substituting Dy by Ho. This makes Gd25Co25Al25Y15Ho10 as an attractive candidate for magnetic refrigerants in hydrogen liquefaction temperature range. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect