| Full text | |
| Author(s): |
de Lima, B. S.
[1]
;
Chaia, N.
[1]
;
Correa, L. E.
[1]
;
Oliveira, F. S.
[1]
;
de Faria, L. R.
[1]
;
de Oliveira, I
[2]
;
Coelho, G. C.
[1]
;
Machado, A. J. S.
[1]
Total Authors: 8
|
| Affiliation: | [1] Escola Engn Lorena USP, POB 116, BR-12602810 Lorena - Brazil
[2] Natl Inst Space Res, Combust & Prop Lab, BR-12630000 Cachoeira Paulista, SP - Brazil
Total Affiliations: 2
|
| Document type: | Journal article |
| Source: | JOURNAL OF PHASE EQUILIBRIA AND DIFFUSION; v. 40, n. 5, p. 697-705, OCT 2019. |
| Web of Science Citations: | 0 |
| Abstract | |
Transition metal dichalcogenides have been receiving considerable attention in the literature due to their great variety of physical properties. Recently, some compounds of this family have been pointed out as new examples of Dirac and Weyl semimetals. However, the lack of thermodynamic data or experimental studies on these binary systems makes the synthesis of high-quality samples purely empirical. This report investigates the binary Nb-Te phase diagram. Results of x-ray diffraction, Rietveld refinement, scanning electron microscopy, and differential thermal analysis strongly suggest that Nb5Te4 and Nb3Te4 are stable only at high temperatures. These phases decompose according to the following eutectoid reactions: Nb3Te4(s)-> Nb-ss + NbTe2(s) at 735 degrees C and Nb5Te4(s)-> Nb-ss + Nb3Te4(s) at 839 degrees C. Furthermore, the results presented in this study show that NbTe2 and NbTe4 are the only stable compounds in the Te-rich portion of the phase diagram (> 60 at.% of Te) at temperatures below 735 degrees C. (AU) | |
| FAPESP's process: | 13/16873-3 - Investigation of new superconductors of the Zr-Cu-Te and Zr-Ni-Te systems |
| Grantee: | Antonio Jefferson da Silva Machado |
| Support Opportunities: | Regular Research Grants |