Anomalous expansion of Nb nanowires in a NiTi matrix under high pressure

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

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Author(s)

  • Cun Yu
  • Yang Ren
  • Lishan Cui
  • Zhiyuan Ma
  • Wenge Yang

Detail(s)

Original languageEnglish
Article number161903
Journal / PublicationApplied Physics Letters
Volume109
Issue number16
Publication statusPublished - 17 Oct 2016
Externally publishedYes

Abstract

Under high pressure, materials usually shrink during compression as described by an equation of state. Here, we present the anomalous volume expansion behavior of a one-dimensional Nb nano-wire embedded in a NiTi transforming matrix, while the matrix undergoes a pressure-induced martensitic transformation. The Nb volume expansion depends on the NiTi transition pressure range from the matrix, which is controlled by the shear strain induced by different pressure transmitting media. The transformation-induced interfacial stresses between Nb and NiTi may play a major role in this anomaly. Our discovery sheds new light on the nano-interfacial effect on mechanical anomalies in heterogeneous systems during a pressure-induced phase transition.

Bibliographic Note

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Citation Format(s)

Anomalous expansion of Nb nanowires in a NiTi matrix under high pressure. / Yu, Cun; Ren, Yang; Cui, Lishan; Ma, Zhiyuan; Yang, Wenge.

In: Applied Physics Letters, Vol. 109, No. 16, 161903, 17.10.2016.

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