About this Abstract |
Meeting |
2nd World Congress on High Entropy Alloys (HEA 2021)
|
Symposium
|
2nd World Congress on High Entropy Alloys (HEA 2021)
|
Presentation Title |
One Order of Magnitude Improvement of the Magnetocaloric Effect of Rare-earth-free High-entropy Alloys |
Author(s) |
Jia Yan Law, Álvaro Díaz-García, Luis M. Moreno-Ramírez, Victorino Franco |
On-Site Speaker (Planned) |
Jia Yan Law |
Abstract Scope |
One of the most reported functional properties of high-entropy alloys (HEAs), the magnetocaloric effect (MCE), only shows large values among those compositions that include rare-earth (RE) elements. However, they have yet to become competitive when compared to conventional magnetocaloric materials. Here we present that the MCE of RE-free HEAs can be improved by more than one order of magnitude upon introducing a magneto-structural phase transition: from 1.7 to 13.1 J kg1K1 (for a moderate magnetic field change of 2.5 T). Instead of sampling the vast HEA compositional space by brute force, we have adopted a directed search procedure to develop FeMnNiGexSi1-x HEAs that enabled us to put the functionality of HEAs comparable to some of the high-performance traditional materials. |
Proceedings Inclusion? |
Undecided |