DC Field | Value | Language |
---|---|---|
dc.contributor.author | Jung, Chanwon | ko |
dc.contributor.author | Jang, Kyuseon | ko |
dc.contributor.author | Park, Hail | ko |
dc.contributor.author | Jang, Jeongin | ko |
dc.contributor.author | Jang, Hanhwi | ko |
dc.contributor.author | Kang, Byungchul | ko |
dc.contributor.author | Park, Kitae | ko |
dc.contributor.author | Zhang, Siyuan | ko |
dc.contributor.author | Villoro, Ruben Bueno | ko |
dc.contributor.author | Park, SuDong | ko |
dc.contributor.author | Ryu, Ho Jin | ko |
dc.contributor.author | Jung, Yeon Sik | ko |
dc.contributor.author | Oh, Min-Wook | ko |
dc.contributor.author | Scheu, Christina | ko |
dc.contributor.author | Yi, Seong-Hoon | ko |
dc.contributor.author | Choi, Pyuck-Pa | ko |
dc.date.accessioned | 2023-08-01T05:00:21Z | - |
dc.date.available | 2023-08-01T05:00:21Z | - |
dc.date.created | 2023-07-31 | - |
dc.date.issued | 2023-12 | - |
dc.identifier.citation | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY, v.165, pp.39 - 48 | - |
dc.identifier.issn | 1005-0302 | - |
dc.identifier.uri | http://hdl.handle.net/10203/310989 | - |
dc.description.abstract | Tailoring nanostructures is a general approach used to obtain enhanced thermoelectric properties for half-Heusler compounds because the wide areas of grain and phase boundaries could be scattering centers that lower lattice thermal conductivity. However, a common fabrication method based on the sintering of crystalline precursors crushed from as-cast alloy ingots has limitations in obtaining a homogeneous microstructure without microsized impurity phases, owing to residual elemental segregation from cast-ing. In this study, we used amorphous NbCoSn alloys as a precursor for the sintered specimen to obtain a homogeneous NbCoSn bulk specimen without microsized impurity phases and segregation, which led to the enhanced Seebeck coefficient due to the high purity of the half-Heusler phase after crystalliza-tion. Moreover, superplasticity originating from amorphous features enabled the powders to be largely deformed during the sintering process, even at a low sintering temperature (953 K). This resulted in less oxidation at both, the grain boundary and the interior, as the O diffusion pathway was blocked during the sintering process. As a result, the NbCoSn0.95Sb0.05 specimen using an amorphous precursor exhibited an enhanced zT of 0.7, due to the increase in the power factor and a decrease in lattice thermal conductivity compared to the specimen using a crystalline precursor.& COPY; 2023 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology. | - |
dc.language | English | - |
dc.publisher | JOURNAL MATER SCI TECHNOL | - |
dc.title | Enhanced thermoelectric properties of NbCoSn half-Heuslers through in-situ nanocrystallization of amorphous precursors during the consolidation process | - |
dc.type | Article | - |
dc.identifier.wosid | 001025739300001 | - |
dc.identifier.scopusid | 2-s2.0-85161850208 | - |
dc.type.rims | ART | - |
dc.citation.volume | 165 | - |
dc.citation.beginningpage | 39 | - |
dc.citation.endingpage | 48 | - |
dc.citation.publicationname | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | - |
dc.identifier.doi | 10.1016/j.jmst.2023.04.037 | - |
dc.contributor.localauthor | Ryu, Ho Jin | - |
dc.contributor.localauthor | Jung, Yeon Sik | - |
dc.contributor.localauthor | Choi, Pyuck-Pa | - |
dc.contributor.nonIdAuthor | Jang, Jeongin | - |
dc.contributor.nonIdAuthor | Park, Kitae | - |
dc.contributor.nonIdAuthor | Zhang, Siyuan | - |
dc.contributor.nonIdAuthor | Villoro, Ruben Bueno | - |
dc.contributor.nonIdAuthor | Park, SuDong | - |
dc.contributor.nonIdAuthor | Oh, Min-Wook | - |
dc.contributor.nonIdAuthor | Scheu, Christina | - |
dc.contributor.nonIdAuthor | Yi, Seong-Hoon | - |
dc.description.isOpenAccess | N | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | Half-Heusler compounds | - |
dc.subject.keywordAuthor | Amorphous | - |
dc.subject.keywordAuthor | Superplasticity | - |
dc.subject.keywordAuthor | Segregation | - |
dc.subject.keywordAuthor | Atom probe tomography | - |
dc.subject.keywordPlus | PERFORMANCE | - |
dc.subject.keywordPlus | PHASE | - |
dc.subject.keywordPlus | TEMPERATURE | - |
dc.subject.keywordPlus | ALLOYS | - |
dc.subject.keywordPlus | NI | - |
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