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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Alloys and Compounds for Thermoelectric and Solar Cell Applications VI
Presentation Title Compressive Creep Behavior of Hot-pressed TAGS-85
Author(s) Ming-Chiang Chang, Matthias T. Agne, Richard Michie, David C. Dunand, G. Jeffrey Snyder
On-Site Speaker (Planned) Matthias T. Agne
Abstract Scope Thermoelectric materials can utilize temperature gradients to generate electrical power, with an efficiency related to the dimensionless parameter. TAGS-85 ((GeTe)85(AgSbTe2)15) has been used for decades in power generation, as it has one of the highest zT (~1.4) among its p-type counterparts at ~400 C. While zT is obviously important, mechanical stability is also crucial for long-term applications. As thermoelectric generators are often under nominal stresses during their operation at high temperatures, it is important to characterize the creep behavior of these materials. Nevertheless, it is one of the least studied properties. In this study, the creep behavior of TAGS-85 is assessed and compared with results for other thermoelectric materials. Determination of the creep-related parameters, including the stress exponent and the activation energy, was obtained by constant temperature and constant stress creep tests, respectively. Our findings provide valuable insight for device design and modeling of high temperature thermoelectric generators.
Proceedings Inclusion? Planned: Supplemental Proceedings volume


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Atomic and Electronic Structures of 2D Semiconductors
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Compressive Creep Behavior of Hot-pressed TAGS-85
Controllable Electrical Contact Resistance between Cu and Oriented-Bi2Te3 Film via Interface Tuning
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Phase Boundary Mapping for the Discovery and Optimization of Thermoelectric Materials
Phase Diagram of Ag-In-Se System and Thermoelectric Properties of In-containing Ag2Se
Phase Diagrams Evaluation for Design of Thermoelectric Materials and Development of Fabrication Processes
Phase Diagrams of Ternary Zn-Sb-In Systems and Thermoelectric Properties of In Doped Zn4Sb3
Phase Diagrams of Ternary Zn-Sb-In Systems and Thermoelectric Properties of (Cu, In)-doped Zn4Sb3 Doped Zn4Sb3
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