Compressive creep behaviour of hot-pressed PbTe

C. C. Li, G. J. Snyder, D. C. Dunand*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Creep deformation is of concern in PbTe thermoelectric modules operating for years at high homologous temperatures while being subjected to internal or external stresses. The creep strain rates of hot-pressed PbTe are measured at 400 °C; a power-law is found, with a stress exponent n = 1.7 at low stresses (2–7 MPa) and n = 4.4 at high stresses (7–35 MPa). Creep rates measured at low stresses (4–6 MPa) between 350 and 500 °C provide a creep activation energy Q = 181 ± 18 kJ/mol. The creep parameters and the good hot ductility of PbTe are compared to those for cast Bi2Te3 reported in the literature.

Original languageEnglish (US)
Pages (from-to)71-74
Number of pages4
JournalScripta Materialia
Volume134
DOIs
StatePublished - Jun 1 2017

Keywords

  • Compressive creep test
  • Creep
  • Hot-pressing
  • Thermoelectric materials

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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