Mechanical properties of Bi xSb 2-xTe 3 nanostructured thermoelectric material

G. Li*, K. R. Gadelrab, T. Souier, P. L. Potapov, G. Chen, M. Chiesa

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

Research on thermoelectric (TE) materials has been focused on their transport properties in order to maximize their overall performance. Mechanical properties, which are crucial for system reliability, are often overlooked. The recent development of a new class of high-performance, low-dimension thermoelectric materials calls for a better understanding of their mechanical behavior to achieve the desired system reliability. In the present study we investigate the mechanical behavior of nanostructure bulk TE material p-type Bi xSb 2xTe 3 by means of nanoindentation and 3D finite element analysis. The Youngs modulus of the material was estimated by the OliverPharr (OP) method and by means of numerically assisted nanoindentation analysis yielding comparable values about 40GPa. Enhanced hardness and yield strength can be predicted for this nanostructured material. Microstructure is studied and correlation with mechanical properties is discussed.

Original languageEnglish
Article number065703
JournalNanotechnology
Volume23
Issue number6
DOIs
Publication statusPublished - Feb 17 2012

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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