Strength of N- and p-type skutterudites

A. A. Wereszczak, M. E. Ragan, K. T. Strong, P. J. Ritt, H. Wang, J. R. Salvador, J. Yang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

The failure stress distributions of developmental Yb0.27Co 4Sb12.08 (n-type) and Ce0.86Co 1.02Fe2.98Sb11.97 (p-type) skutterudites were measured as a function of temperature. These thermoelectric materials are attractive candidates for use in devices under consideration for power generation sourced from intermediate to high-temperature waste heat recovery. A self-aligning, high-temperature-capable, three-point-bend fixture was developed and used to test specimens whose cross-sectional dimensions were equivalent to those typically used in thermoelectric device legs. The strength of the n-type skutterudite was approximately 115 MPa and independent of temperature to 500°C. The strength of the p-type skutterudite was equivalent to that of the n-type material and independent of temperature to at least 200°C, but its strength dropped by ∼20% at 400°C. Compared to other skutterudites, the herein tested compositions have equivalent or even superior strength.

Original languageEnglish
Title of host publicationAdvanced Materials for Sustainable Developments - A Collection of Papers Presented at the 34th International Conference on Advanced Ceramics and Composites, ICACC
Pages49-59
Number of pages11
Edition9
StatePublished - 2010
EventAdvanced Materials for Sustainable Developments - 34th International Conference on Advanced Ceramics and Composites, ICACC - Daytona Beach, FL, United States
Duration: Jan 24 2010Jan 29 2010

Publication series

NameCeramic Engineering and Science Proceedings
Number9
Volume31
ISSN (Print)0196-6219

Conference

ConferenceAdvanced Materials for Sustainable Developments - 34th International Conference on Advanced Ceramics and Composites, ICACC
Country/TerritoryUnited States
CityDaytona Beach, FL
Period01/24/1001/29/10

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