Entropy tailoring of thermodynamic behaviors and magnetocaloric effects in (GdTbDy)CoAl metallic glasses
The effect of configuration entropy (ΔSconf) on thermal properties and magnetocaloric effects (MCE) of metallic glasses (MGs) remains vague. In this work, Tb55Co17.5Al27.5 low-, (Gd0.5Tb0.5)55Co17.5Al27.5 medium-, and (Gd1/3Tb1/3Dy1/3)55Co17.5Al27.5 high-entropy (LE, ME, and HE) MGs with critical di...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2024-02-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S026412752400025X |
| _version_ | 1797301574111854592 |
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| author | Fan Jin Chenchen Yuan Changmeng Pang Xinming Wang Chengrong Cao Juntao Huo |
| author_facet | Fan Jin Chenchen Yuan Changmeng Pang Xinming Wang Chengrong Cao Juntao Huo |
| author_sort | Fan Jin |
| collection | DOAJ |
| description | The effect of configuration entropy (ΔSconf) on thermal properties and magnetocaloric effects (MCE) of metallic glasses (MGs) remains vague. In this work, Tb55Co17.5Al27.5 low-, (Gd0.5Tb0.5)55Co17.5Al27.5 medium-, and (Gd1/3Tb1/3Dy1/3)55Co17.5Al27.5 high-entropy (LE, ME, and HE) MGs with critical diameters more than 5 mm were successfully fabricated. Systematic investigations into their thermodynamic behaviors suggest that high ΔSconf might deteriorate glass forming ability (GFA) along with reduced viscosity. Simultaneously, an improved thermal stability was observed in ME and HE MGs for their high activation energies for glass transition, crystal nucleation and growth, while the notable ordered structure in HE MG could accelerate glass transition and crystal growth by reducing activation energies. Studies of MCE indicate that the distinguished spin glass behaviors and higher structural order in HE MGs comprehensively contribute to an enhanced relative cooling power and a broader magnetic-transition temperature range, whereas the change of Curie temperature and maximum magnetic entropy more depends on the de Gennes factor rather than ΔSconf. All three designed MGs manifesting the competitive GFA and MCE could be candidates for magnetic refrigeration. Our studies show that entropy tailoring seems to play a dominant role in determining thermodynamic behaviors, which could help to design more stable MCE MGs. |
| first_indexed | 2024-03-07T23:24:33Z |
| format | Article |
| id | doaj.art-2621b98a493c4e1689d8be2ae532a323 |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-03-07T23:24:33Z |
| publishDate | 2024-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-2621b98a493c4e1689d8be2ae532a3232024-02-21T05:23:55ZengElsevierMaterials & Design0264-12752024-02-01238112653Entropy tailoring of thermodynamic behaviors and magnetocaloric effects in (GdTbDy)CoAl metallic glassesFan Jin0Chenchen Yuan1Changmeng Pang2Xinming Wang3Chengrong Cao4Juntao Huo5School of Materials Science and Engineering, Jiangsu Key Laboratory for Advanced Metallic Materials, Southeast University, Nanjing 211189, China; Yangtze River Delta Physics Research Center, Liyang, Jiangsu 213300, ChinaSchool of Materials Science and Engineering, Jiangsu Key Laboratory for Advanced Metallic Materials, Southeast University, Nanjing 211189, China; Corresponding author.School of Materials Science and Engineering, Jiangsu Key Laboratory for Advanced Metallic Materials, Southeast University, Nanjing 211189, ChinaCAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang 315201, ChinaYangtze River Delta Physics Research Center, Liyang, Jiangsu 213300, China; Institute of Physics, Chinese Academy of Sciences, Beijing 100190, ChinaCAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang 315201, ChinaThe effect of configuration entropy (ΔSconf) on thermal properties and magnetocaloric effects (MCE) of metallic glasses (MGs) remains vague. In this work, Tb55Co17.5Al27.5 low-, (Gd0.5Tb0.5)55Co17.5Al27.5 medium-, and (Gd1/3Tb1/3Dy1/3)55Co17.5Al27.5 high-entropy (LE, ME, and HE) MGs with critical diameters more than 5 mm were successfully fabricated. Systematic investigations into their thermodynamic behaviors suggest that high ΔSconf might deteriorate glass forming ability (GFA) along with reduced viscosity. Simultaneously, an improved thermal stability was observed in ME and HE MGs for their high activation energies for glass transition, crystal nucleation and growth, while the notable ordered structure in HE MG could accelerate glass transition and crystal growth by reducing activation energies. Studies of MCE indicate that the distinguished spin glass behaviors and higher structural order in HE MGs comprehensively contribute to an enhanced relative cooling power and a broader magnetic-transition temperature range, whereas the change of Curie temperature and maximum magnetic entropy more depends on the de Gennes factor rather than ΔSconf. All three designed MGs manifesting the competitive GFA and MCE could be candidates for magnetic refrigeration. Our studies show that entropy tailoring seems to play a dominant role in determining thermodynamic behaviors, which could help to design more stable MCE MGs.http://www.sciencedirect.com/science/article/pii/S026412752400025XConfigurational entropyThermodynamic behaviorsMagnetocaloric effectsMetallic glasses |
| spellingShingle | Fan Jin Chenchen Yuan Changmeng Pang Xinming Wang Chengrong Cao Juntao Huo Entropy tailoring of thermodynamic behaviors and magnetocaloric effects in (GdTbDy)CoAl metallic glasses Materials & Design Configurational entropy Thermodynamic behaviors Magnetocaloric effects Metallic glasses |
| title | Entropy tailoring of thermodynamic behaviors and magnetocaloric effects in (GdTbDy)CoAl metallic glasses |
| title_full | Entropy tailoring of thermodynamic behaviors and magnetocaloric effects in (GdTbDy)CoAl metallic glasses |
| title_fullStr | Entropy tailoring of thermodynamic behaviors and magnetocaloric effects in (GdTbDy)CoAl metallic glasses |
| title_full_unstemmed | Entropy tailoring of thermodynamic behaviors and magnetocaloric effects in (GdTbDy)CoAl metallic glasses |
| title_short | Entropy tailoring of thermodynamic behaviors and magnetocaloric effects in (GdTbDy)CoAl metallic glasses |
| title_sort | entropy tailoring of thermodynamic behaviors and magnetocaloric effects in gdtbdy coal metallic glasses |
| topic | Configurational entropy Thermodynamic behaviors Magnetocaloric effects Metallic glasses |
| url | http://www.sciencedirect.com/science/article/pii/S026412752400025X |
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