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Article Dans Une Revue Materials Science and Engineering: A Année : 2013

Thermoelectric and mechanical properties of a hot pressed nanostructured n-type Si80Ge20 alloy

Résumé

The thermoelectric behavior, mechanical properties and microstructures of bulk n-type Si80Ge20 samples prepared by mechanical alloying (grain size < 200 nm) and hot pressing are investigated. The measured figure of merit (ZT) is approximately 1 at 800 degrees C. Young's modulus measured by acoustic echography, four point bending test and nanoindentation is estimated to be similar to 143 GPa for dense sample. Bulk hardness, determined by nanoindentation is 14.5 GPa (at 0.1 N load). Fracture toughness estimated by Vickers indentation method assuming Palmqvist cracks system is around 1 MPa root m. (c) 2012 Elsevier B.V. All rights reserved.

Domaines

Matériaux

Dates et versions

hal-00839657 , version 1 (28-06-2013)

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Citer

A.C. Kallel, G. Roux, C.L. Martin. Thermoelectric and mechanical properties of a hot pressed nanostructured n-type Si80Ge20 alloy. Materials Science and Engineering: A, 2013, 564, pp.65-70. ⟨10.1016/j.msea.2012.11.073⟩. ⟨hal-00839657⟩
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