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Title: Spark plasma sintered bismuth telluride-based thermoelectric materials incorporating dispersed boron carbide
Authors: Williams, Hugo R.
Ambrosi, R. M.
Chen, K.
Friedman, U.
Ning, H.
Reece, M. J.
Robbins, M. C.
Simpson, K.
Stephenson, K.
First Published: 25-Mar-2015
Publisher: Elsevier
Citation: Journal of Alloys and Compounds, 2015, 626, pp. 368-374 (7)
Abstract: The mechanical properties of bismuth telluride based thermoelectric materials have received much less attention in the literature than their thermoelectric properties. Polycrystalline p-type Bi0.5Sb1.5Te3 materials were produced from powder using spark plasma sintering (SPS). The effects of nano-B4C addition on the thermoelectric performance, Vickers hardness and fracture toughness were measured. Addition of 0.2 vol% B4C was found to have little effect on zT but increased hardness by approximately 27% when compared to polycrystalline material without B4C. The KIC fracture toughness of these compositions was measured as 0.80 MPa m[superscript 1/2] by Single-Edge V-Notched Beam (SEVNB). The machinability of polycrystalline materials produced by SPS was significantly better than commercially available directionally solidified materials because the latter is limited by cleavage along the crystallographic plane parallel to the direction of solidification.
DOI Link: 10.1016/j.jallcom.2014.12.010
ISSN: 0925-8388
eISSN: 1873-4669
Embargo on file until: 25-Mar-2017
Version: Post-print
Status: Peer-reviewed
Type: Journal Article
Rights: Archived with reference to SHERPA/RoMEO and publisher website. NOTICE: this is the author’s version of a work that was accepted for publication in Journal of Alloys and Compounds. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Alloys and Compounds, Volume 626, (25 March 2015) DOI 10.1016/j.jallcom.2014.12.010
Appears in Collections:Published Articles, Dept. of Engineering

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