Simulation of fe-ti-sb thernary phase diagram at temperatures above 900 k

Anastasiia Tukmakova, Anna Novotelnova, Sergey Taskaev, Hiroyuki Miki, Vladimir Khovaylo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Heusler alloys have been considered as one of the most promising thermoelectric materials for electrical power generation in a temperature range of 500–800 ºC. Establishment of phase diagrams allows one to predict formation, equilibria, and stability of phases in of these ternary alloys. In this work we report on the simulation and investigation of phase diagram and phase equilibria in ternary Ti-Fe-Sb system which is of considerable interest for thermoelectric applications. The simulation was carried out using the CALPHAD method in Pandat software. The existence of the thermoelectric Heusler TiFe1.5Sb phase was revealed in a temperature range from 970 to 1070 K. The equilibria between TiFe1.5Sb and other phases were determined. The entropy of formation was calculated for the phases existing at 970, 1020 and 1070 K using a fitting approach. A narrow equilibrium region containing pure body centered cubic Fe and TiFe1.5Sb was found.

Original languageEnglish
Title of host publicationMaterial and Manufacturing Technology XI - Selected peer reviewed papers from the 11th International Conference on Materials and Manufacturing Technology, 11th ICMMT 2020
EditorsVladimir Khovaylo, Ratchatin Chancharoen
PublisherTrans Tech Publications Ltd
Pages114-119
Number of pages6
ISBN (Print)9783035737226
DOIs
Publication statusPublished - 2021
Event11th International Conference on Materials and Manufacturing Technology, ICMMT 2020 - Bangkok, Thailand
Duration: 2020 Apr 242020 Apr 26

Publication series

NameKey Engineering Materials
Volume877 KEM
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795

Conference

Conference11th International Conference on Materials and Manufacturing Technology, ICMMT 2020
Country/TerritoryThailand
CityBangkok
Period20/4/2420/4/26

Keywords

  • CALPHAD
  • Computational thermodynamics
  • Heusler alloys
  • Phase diagram
  • Thermoelectrics

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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