Effect of Milling Time on the Microstructure and Thermoelectric Properties of P‐type TAGS‐90 Alloys by HEM and SPS |
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| Authors: | Hyo‐Seob Kim Babu Madavali Soon‐Jik Hong Taek‐Soo Kim |
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| Affiliation: | 1. 208 Metals Development, Ames Laboratory, Iowa State University, Ames, Iowa;2. Division of Advanced Materials Engineering & Institute for Rare Metals, Kongju National University, Cheonan, Korea;3. Korea Institute for Rare Metals (KIRAM), Korea Institute of Industrial Technology (KITECH), Yeonsu‐gu, Incheon, Korea |
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| Abstract: | In this study, p‐type TAGS‐90 powders were fabricated using high‐energy milling (HEM), subsequently sintered by spark plasma sintering (SPS). And then, the effects of milling time on the microstructure, mechanical, and thermoelectric properties were investigated. The powders were quickly decreased to fine particles of ~1 μm in size and uniformly agglomerated with the increasing of milling time. XRD results indicated that all milled powders and SPSed samples showed single GeTe phase. Also, EDX results showed almost no contamination and exact composition after milling. The maximum figure of merit, ZT = 1.08, was obtained for 30‐min‐milled sample at 723 K. |
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