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Effect of Milling Time on the Microstructure and Thermoelectric Properties of P‐type TAGS ‐90 Alloys by HEM and SPS
Author(s) -
Kim HyoSeob,
Madavali Babu,
Hong SoonJik,
Kim TaekSoo
Publication year - 2015
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12476
Subject(s) - materials science , spark plasma sintering , microstructure , thermoelectric effect , sintering , metallurgy , physics , thermodynamics
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 SPS ed 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.