THERMOELECTRIC PROPERTIES OF NOWOTNY PHASE, HIGHER MANGANESE SILICIDES SYNTHESISED BY MECHANICAL ALLOYING PROCESS

Higher manganese silicides (HMS), MnSi1.73, were synthesised by the mechanical alloying of stoichiometric elemental powder compositions, and the as-milled powders were consolidated by vacuum hot pressing. Phase transformation and microstructural evolution during mechanical alloying and hot consolida...

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Bibliographic Details
Published inJournal of Ceramic Processing Research Vol. 13; no. 6; pp. 816 - 819
Main Authors Lee, Y-G, Choi, M-K, Kim, I-H, Ur, S-C
Format Journal Article
LanguageEnglish
Published 세라믹연구소 01.01.2012
Subjects
Analogue
Coefficients
Consolidation
Figure of merit
Mechanical alloying
Silicides
Thermal conductivity
Thermoelectricity
재료공학
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Summary:Higher manganese silicides (HMS), MnSi1.73, were synthesised by the mechanical alloying of stoichiometric elemental powder compositions, and the as-milled powders were consolidated by vacuum hot pressing. Phase transformation and microstructural evolution during mechanical alloying and hot consolidation were investigated using XRD and SEM, respectively. Thermoelectric properties as a function of temperature were evaluated in terms of Seebeek coefficient, electrical resistivity, thermal conductivity and the figure of merit. Transport properties were also evaluated and discussed with analogue studies. Mechanically alloyed HMS showed a figure of merit value of 0.5 at 823 K, and appear to have a great potential as a thermoelectric material.
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ISSN:1229-9162
2672-152X