Improved mechanical properties of thermoelectric (Bi0.2Sb0.8)2Te3 by nanostructuring

M. G. Lavrentev, V. B. Osvenskii, Yu N. Parkhomenko, G. I. Pivovarov, A. I. Sorokin, L. P. Bulat*, H. S. Kim, I. T. Witting, G. J. Snyder, V. T. Bublik, N. Yu Tabachkova

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Temperature-dependent strength of Bi-Sb-Te under uniaxial compression is investigated. Bi-Sb-Te samples were produced by three methods: vertical zone-melting, hot extrusion, and spark plasma sintering (SPS). For zone-melted and extruded samples, the brittle-ductile transition occurs over a temperature range of 200-350 °C. In nanostructured samples produced via SPS, the transition is observed in a narrower temperature range of 170-200 °C. At room temperature, the strength of the nanostructured samples is higher than that of zone-melted and extruded samples, but above 300 °C, all samples decrease to roughly the same strength.

Original languageEnglish (US)
Article number104807
JournalAPL Materials
Volume4
Issue number10
DOIs
StatePublished - Oct 1 2016

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)

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