|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Alloys and Compounds for Thermoelectric and Solar Cell Applications V
||L-23: Thermoelectric Properties of Nanostructured HMSs/Si Eutectic Alloy Prepared by a Melt Spinning Method
||Saori Wadagaki, Yuji Ohishi, Hiroaki Muta, Ken Kurosaki, Shinsuke Yamanaka
|On-Site Speaker (Planned)
Nanostructuring is one of the effective methods of reducing thermal conductivity, and that leads higher <I>zT</I>, which characterizes thermoelectric (TE) performance. Higher manganese silicides (HMSs, MnSi<SUB>1.75-<I>x</I></SUB> with <I>x</I>=0-0.04) are considered as potentially important <I>p</I>-type TE materials because of their nontoxicity and abundant reserves. In this work, we fabricated nanostructured HMSs/Si eutectic alloy by a melt-spinning (MS) method. The melt spun samples had a characteristic nanostructure where Si nano-precipitates with less than 100 nm in diameter were dispersed in the HMSs matrix. On the contrary, arc-melted sample had Si precipitates with about 1 μm in diameter. To obtain bulk samples, each sample was crushed into powder followed by a spark plasma sintering (SPS). The thermal conductivity of MS+SPS sample was 4.87 W/m/K, which was approximately 13% lower than Arc+SPS sample. TE properties of these will be discussed.
||Planned: Supplemental Proceedings volume