Busca avançada
Ano de início
Entree
(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Experimental Study of the Binary Nb-Te System

Texto completo
Autor(es):
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]
Número total de Autores: 8
Afiliação do(s) autor(es):
[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
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: JOURNAL OF PHASE EQUILIBRIA AND DIFFUSION; v. 40, n. 5, p. 697-705, OCT 2019.
Citações Web of Science: 0
Resumo

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)

Processo FAPESP: 13/16873-3 - Investigação de novos supercondutores dos sistemas Zr-Cu-Te e Zr-Ni-Te
Beneficiário:Antonio Jefferson da Silva Machado
Linha de fomento: Auxílio à Pesquisa - Regular