Thermal stability of half-Heusler (Ti,Nb)FeSb alloys

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Authors	BROŽ Pavel ZELENKA František VŘEŠŤÁL Jan BURŠÍK Jiří ZEMANOVÁ Adéla ROGL Gerda ROGL Peter Franz
Year of publication	2020
Type	Conference abstract
MU Faculty or unit	Faculty of Science
Citation
Attached files	TOFA_2020_abstract_O30.pdf
Description	Half-Heusler (H-H) alloys are known for their thermoelectric properties which can be optimized by doping the three individual sublattices with suitable elements. If volatile elements such as Sb or others are involved, the study of vaporization characteristics for long term thermal stability of these materials is of practical importance. This contribution presents a study of thermal and phase stability of H-H alloys, (Ti,Nb)FeSb, prepared by hot pressing or by ball milling and hot pressing, by means of thermal analysis and the Knudsen effusion method. The results supported by data from microstructure measurements and the measurement of the diffusion profiles are discussed in view of phase diagrams of the respective ternary systems and results of our previous investigation of the long term thermal stability of didymium doped p-type skutterudites.
Related projects:	Tepelná a fázová stabilita pokročilých termoelektrických materiálů