Effect of the sintering pressure on structure and microstructure of the filled skutterudite Smy(FexNi1-x)4Sb12 (x = 0.50–0.80, y = 0.17–0.55)

Cristina Artini, Alessandro Cingolani, Fabrizio Valenza, Umberto Anselmi-Tamburini, Giovanna Latronico, Paolo Mele

研究成果: Article査読

1 被引用数 (Scopus)

抄録

A structural and microstructural study was performed on several compositions of the Smy(FexNi1-x)4Sb12 system treated at three different pressures during the spark plasma sintering (SPS) process. Aim of the study is to recognize the effect of applied pressure at a fixed temperature on composition, microstrain and domains size, due to the relevance of these parameters in driving the thermoelectric properties of the material. Increasing pressure induces a change in the Sm amount, as well as an increase in microstrain and a decrease in the diffraction domains size. At the same time, enhancing pressure above a certain threshold promotes the formation of the extra phase (Sm,Fe,Ni)Sb2, and hence a large power factor reduction. Relying on data collected in this work, applying a pressure close to 180 MPa during SPS results to be a good compromise between advantages in terms of microstructure and transport properties, and disadvantages in terms of phase purity.

本文言語English
論文番号111261
ジャーナルMaterials Research Bulletin
139
DOI
出版ステータスPublished - 2021 7

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

フィンガープリント

「Effect of the sintering pressure on structure and microstructure of the filled skutterudite Sm<sub>y</sub>(Fe<sub>x</sub>Ni<sub>1-</sub><sub>x</sub>)<sub>4</sub>Sb<sub>12</sub> (x = 0.50–0.80, y = 0.17–0.55)」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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