X-ray photoelectron spectroscopy studies of the electronic structure of superconducting Nb2SnC and Nb2SC

Microstructure, mechanical properties and oxidation behaviors of magnetron sputtered NbNx coatings

“…The spectrum of the oxidized Nb 2 N and NbN coatings is almost the same. The two sharp peaks at binding energies of 206.9 and 209.6 eV are ascribed to Nb 3d 5/2 and Nb 3d 3/2 of Nb 2 O 5 [30]. The compositional depth profiles of the oxidized Nb 2 N and NbN coatings reveal uniform composition of the Nb 2 O 5 oxide scales by XPS combined with Ar þ sputter etching (not shown here).…”

“…2f) do not show big changes (peaks shift less than 0.2 eV), which are ascribed to NbN. Besides, in all the NbN x coatings, a small amount of Nb 2 O 5 is detected with Nb 3d 5/2 of 206.9 eV and Nb 3d 3/2 of 209.6 eV [30]. These Nb 2 O 5 may come from the oxidation reaction during the deposition process and the surface oxygen contamination.…”

Electron–phonon interaction and superconductivity in hexagonal ternary carbides Nb2 AC (A: Al, S, Ge, As and Sn)

“…In addition, Nasir et al have studied the structural parameters, elastic, electronic, thermodynamic and optical properties of Nb 2 AC (A:S and Sn) [53]. The other four materials, Nb 2 AC (A: Al, Ge, As and Sn), have also been synthesized [54,55] and variety of experimental and theoretical studies have revealed the structural [56][57][58][59][60][61][62][63][64][65][66], electronic [57][58][59][60][61][62][63][64][65][66][67][68][69][70][71][72][73], mechanical and vibrational [64][65][66][67][68][69][70][71][72][73], thermodynamic [56,63], thermal [63-65, 70, 74], magnetic [74], transport [74] and optical [63]…”

Phase stability, mechanical properties and lattice thermal conductivity of ceramic material (Nb1−Ti )4AlC3 solid solutions

“…In the past decades, ternary carbides and nitrides ceramics known as the M n+1 AX n (MAX) phases (where n =1, 2, 3 or higher, M is an early transition metal atom, A is a group , , or elements and X is either C and/or N) have attracted much attention as promising engineering materials, due to their unique properties such as good electrical and thermal conductivity, damage tolerance, high melting point and excellent thermal shock resistance [1][2][3][4][5][6][7][8][9][10][11][12]. According to the value of layer index n, M n+1 AX n phases are labeled as 211, 312 and 413 phases for n=1, 2, 3, respectively.…”