In:
Applied Physics Letters, AIP Publishing, Vol. 124, No. 6 ( 2024-02-05)
Abstract:
Being a crucial research frontier, high-entropy alloys advance traditional materials in mechanical properties under various conditions. Nonetheless, other functions, like magnetic, electrical, and optical properties, of high-entropy alloys are still deficient. This paper presents a high-entropy system exhibiting a large barocaloric effect. Experimental results confirm that equiatomic FeMnCoNiGeSi and CrMnCoNiGeSi are high-entropy solid-solutions with hexagonal and orthorhombic structures at room temperature, respectively. Further tuning Fe/Cr ratio in a CrxFe1−xMnCoNiGeSi high-entropy system establishes a thermal-induced hexagonal–orthorhombic structural transformation. For the alloy with x = 0.44–0.50, the structural transformation occurs at room temperature and can be induced by applying or withdrawing hydrostatic pressure. The barocaloric effect reaches −30.6 J kg−1·K−1 when withdrawing hydrostatic pressure from 5 to 0 kbar, and the entropy change per 1 kbar is comparable to widely studied intermetallic compounds.
Type of Medium:
Online Resource
ISSN:
0003-6951
,
1077-3118
Language:
English
Publisher:
AIP Publishing
Publication Date:
2024
detail.hit.zdb_id:
211245-0
detail.hit.zdb_id:
1469436-0
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