|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Alloys and Compounds for Thermoelectric and Solar Cell Applications VI
||Study of Cobalt Silicide by Grain Boundary Engineering
||Wang Yunxia, Muta Hiroaki, Ohishi Yuji, Kurosaki Ken, Yamanaka Shinsuke
|On-Site Speaker (Planned)
Silicide alloys were widely studied because most of them are consist of less expensive, more earth-abundant and environmental elements. Among them, CoSi has been reported to be one of the promising candidates for advanced thermoelectric applications.
One of the preferred methods of significantly enhancing the thermopower in recent years is the introduce inclusions on the grain boundaries. The Seebeck coefficient will be enhanced through energy filtering effect. In this study, we fabricated CoSi alloy with a composition of CoSi1-xBx combining melt spinning and annealing process. Compared with CoSi without boron doping, melt spinning and annealing, a considerable enhancement in the Seebeck coefficient was found in our material. We attributed this behavior to the effect of grain boundaries including energy filtering effect. The influences of sub-micro precipitates and grain boundary on the Seebeck coefficient will be discussed in detail.
||Planned: Supplemental Proceedings volume