The incredible excess entropy in high entropy alloys

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

7 Scopus Citations
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Author(s)

  • Jianbin Wang
  • Junjie Li
  • Qing Wang
  • Jincheng Wang

Detail(s)

Original languageEnglish
Pages (from-to)19-22
Journal / PublicationScripta Materialia
Volume168
Online published17 Apr 2019
Publication statusPublished - 15 Jul 2019

Abstract

The increased excess entropy in face-centered-cubic high entropy alloys is confirmed by quantitatively measuring heat capacities of pure Ni together with equiatomic NiCo, NiCoCr, and NiCoFeCr alloys with increasing configurational entropy. Surprisingly, the incredible excess entropy in the NiCoFeCr alloy can be even up to 0.9R, much larger than that in traditional alloys. The temperature-dependent measurement of the excess entropy indicates the major contribution of lattice vibrations. The excess magnetic entropy dominates in the temperature of 300 to 1000 K. The abnormal excess entropy reveals extraordinary lattice dynamic effects in high entropy alloys, which is a new feature in these alloys.

Research Area(s)

  • Excess entropy, High entropy alloys, Magnetic entropy, Heat capacity

Citation Format(s)

The incredible excess entropy in high entropy alloys. / Wang, Jianbin; Li, Junjie; Wang, Qing; Wang, Jincheng; Wang, Zhijun; Liu, C.T.

In: Scripta Materialia, Vol. 168, 15.07.2019, p. 19-22.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review