English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
Add to Basket
  Local TagsRelease HistoryDetailsSummary

Released
Journal Article

Miscibility Gap in the Phase Diagrams of Thermoelectric Half-Heusler Materials CoTi1-xYxSb (Y = Sc, V, Mn, Fe)

MPS-Authors
/persons/resource/persons134308

Rausch,  Elisabeth
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126789

Ouardi,  Siham
Siham Ouardi, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126599

Fecher,  Gerhard H.
Gerhard Fecher, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126601

Felser,  Claudia
Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available
Citation

Mena, J. M., Rausch, E., Ouardi, S., Gruhn, T., Fecher, G. H., Schoberth, H. G., et al. (2016). Miscibility Gap in the Phase Diagrams of Thermoelectric Half-Heusler Materials CoTi1-xYxSb (Y = Sc, V, Mn, Fe). Journal of Electronic Materials, 45(3), 1382-1388. doi:10.1007/s11664-015-4041-9.


Cite as: https://hdl.handle.net/11858/00-001M-0000-002A-2DE5-2
Abstract
The half-Heusler system CoTi1-xYxSb (Y = Sc, V, Mn, Fe) has been investigated by means of an ab initio-based mean-field model which provides phase diagrams of alloys. Co(Ti, Y) Sb materials show a miscibility gap, which leads to spontaneous demixing within a spinodal region. The results are compared with experimental investigations of microstructure and transport properties of the alloys. The thermoelectric properties of the solid solution were investigated comprehensively by measuring the temperature dependence of the Seebeck coefficient as well as electrical and thermal conductivity. Compared with pure CoTiSb, the thermal conductivity of substituted CoTi0.9Y0.1Sb was significantly reduced by approximately 53% for Y = V. Here, we report on the effect of phase separation in the Co(Ti, Y) Sb system and its consequences for the thermoelectric figure or merit.