|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Alloys and Compounds for Thermoelectric and Solar Cell Applications V
||L-14: Effect of Microstructure of the Thermoelectric Properties of Al-based Intermetallic Compounds Prepared by a Melt-spinning Method
||Akira Umeda, Ken Kurosaki, Masaya Kumagai, Yuji Ohishi, Hiroaki Muta, Shinsuke Yamanaka
|On-Site Speaker (Planned)
We have focused on Al-based thermoelectric (TE) materials, such as RuAl2 and VAl3, which can be candidates of low-toxicity/cost-effective TE materials. Although Al-based TE materials show high power factor, the dimensionless figure of merit zT is low, due to their relatively high lattice thermal conductivity (κlat). Since κlat is dependent on the microstructure of bulk materials, the microstructure-control is an effective way to reduce the κlat. In the present study, we prepared the bulk samples of RuAl2 and VAl3 by melt-spinning followed by spark plasma sintering, where the microstructure was controlled by mainly changing the cooling rate. The effect of microstructure, in particular the grain size, on the κlat as well as other TE properties of RuAl2 and VAl3 will be discussed.
||Planned: Supplemental Proceedings volume