Titre :

Thermoelectric properties of a high entropy half-Heusler alloy processed by a fast powder metallurgy route

Auteur(s) :

Karati, Anirudha [Auteur]
Indian Institute of Technology Madras [IIT Madras]
Mishra, Soumya Ranjan [Auteur]
Indian Institute of Technology Madras [IIT Madras]
Ghosh, Sanyukta [Auteur]
Indian Institute of Science [Bangalore] [IISc Bangalore]
Mallik, Ramesh Chandra [Auteur]
Indian Institute of Science [Bangalore] [IISc Bangalore]
Shabadi, Rajashekhara [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Ramanujan, R.V. [Auteur]
Nanyang Technological University [Singapour] [NTU]
Yadav, Satyesh Kumar [Auteur]
Indian Institute of Technology Madras [IIT Madras]
Murty, B.S. [Auteur]
Indian Institute of Technology Madras [IIT Madras]
Varadaraju, U.V. [Auteur]
Indian Institute of Technology Madras [IIT Madras]

Titre de la revue :

Journal of Alloys and Compounds

Nom court de la revue :

Journal of Alloys and Compounds

Numéro :

924

Pagination :

166108

Éditeur :

Elsevier BV

Date de publication :

2022-11

ISSN :

0925-8388

Discipline(s) HAL :

Chimie/Matériaux
Physique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]

Résumé en anglais : [en]

A half-Heusler (HH) type high entropy alloy (HEA) Ti2NiCoSnSb has been synthesized by a fast powder metallurgy route for the first time. Mechanical alloying (MA) by wet milling produced a powder with a minor fraction of ...
Lire la suite >A half-Heusler (HH) type high entropy alloy (HEA) Ti2NiCoSnSb has been synthesized by a fast powder metallurgy route for the first time. Mechanical alloying (MA) by wet milling produced a powder with a minor fraction of the HH phase. The dry milling route resulted in the desired single-phase HH material. Consolidation of the nanocrystalline mechanically alloyed (MA) powder by spark plasma sintering (SPS) resulted in a majority HH phase. Interestingly, the nanocrystalline alloy exhibited simultaneous enhancement in the Seebeck coefficient and electrical conductivity, with a maximum ZT of 0.13 at 973 K observed for the dry milled alloy. The band structure obtained by density functional theory (DFT) was in good agreement with the ultraviolet-visible-near infrared (UV-Vis-NIR) absorption spectroscopy results. The DFT calculations and microstructural analysis suggest that phase separation strongly influenced the thermoelectric properties. The band structure calculations provided a good rationale for the phase evolution and thermoelectric properties.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

Université de Lille
CNRS
INRAE
ENSCL

Collections :

• Unité Matériaux et Transformations (UMET) - UMR 8207

Équipe(s) de recherche :

Métallurgie Physique et Génie des Matériaux

Date de dépôt :

2024-01-15T14:27:39Z
2024-01-24T08:47:51Z