Carregant...
Fitxers
Tipus de document
ArticleVersió
Versió publicadaData de publicació
Tots els drets reservats
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/192115
Colossal Elastocaloric Effect in Ferroelastic Ni-Mn-Ti Alloys
Títol de la revista
Director/Tutor
ISSN de la revista
Títol del volum
Recurs relacionat
Resum
Energy-efficient and environment-friendly elastocaloric refrigeration, which is a promising replacement of the conventional vapor-compression refrigeration, requires extraordinary elastocaloric properties. Hitherto the largest elastocaloric effect is obtained in small-size films and wires of the prototype NiTi system. Here, we report a colossal elastocaloric effect, well exceeding that of NiTi alloys, in a class of bulk polycrystalline NiMn-based materials designed with the criterion of simultaneously having large volume change across phase transition and good mechanical properties. The reversible adiabatic temperature change reaches a strikingly high value of 31.5 K and the isothermal entropy change is as large as 45 J kg−1 K−1. The achievement of such a colossal elastocaloric effect in bulk polycrystalline materials should push a significant step forward towards large-scale elastocaloric refrigeration applications. Moreover, our design strategy may inspire the discovery of giant caloric effects in a broad range of ferroelastic materials.
Matèries
Matèries (anglès)
Citació
Citació
CONG, Daoyong, XIONG, Wenxin, PLANES VILA, Antoni, REN, Yang, MAÑOSA, Lluís, CAO, Peiyu, NIE, Zhihua, SUN, Xiaoming, YANG, Zhi, HONG, Xiufeng, WANG, Yandong. Colossal Elastocaloric Effect in Ferroelastic Ni-Mn-Ti Alloys. _Physical Review Letters_. 2019. Vol. 122, núm. 255703. [consulta: 8 de gener de 2026]. ISSN: 0031-9007. [Disponible a: https://hdl.handle.net/2445/192115]