Structural and morphological characteristics of yttrium and lutetium orthoborates synthesized in thin layers of borate oxide glasses

EPR and magnetic susceptibility measurements have been performed on x Fe 2 O 3·(100-x) [3B2O3·CaO] glasses with 0<x≤40 mol%. The Fe 3+ ions in sites of distorted octahedral symmetry and clustered formations containing both Fe 3+ and Fe 2+ ionic species were found. Dipolar and magnetic super-exchange interactions involving iron ions were revealed to depend on the iron content of the sample.

Download Full-text

Structural and Femtosecond Third-Order Nonlinear Optical Properties of Sodium Borate Oxide Glasses: Effect of Antimony

The Journal of Physical Chemistry C ◽

10.1021/acs.jpcc.8b09466 ◽

2019 ◽

Vol 123 (9) ◽

pp. 5591-5602 ◽

Cited By ~ 9

Author(s):

Gangareddy Jagannath ◽

Bheemaiah Eraiah ◽

Anuraag Gaddam ◽

Hugo Fernandes ◽

Daniela Brazete ◽

...

Keyword(s):

Optical Properties ◽

Nonlinear Optical ◽

Nonlinear Optical Properties ◽

Sodium Borate ◽

Oxide Glasses ◽

Third Order ◽

Borate Oxide

Download Full-text

Deposition of molybdenum nitride thin layers on substrates of stainless steel AISI304 using a Mather-type of plasma focus device

Modern Physics Letters B ◽

10.1142/s0217984919503469 ◽

2019 ◽

Vol 33 (28) ◽

pp. 1950346

Author(s):

Sh. Al-Hawat ◽

M. Akel ◽

B. Abdallah ◽

M. Abu Kharoub

Keyword(s):

Surface Roughness ◽

Plasma Focus ◽

Morphological Characteristics ◽

Deposition Process ◽

Atomic Ratio ◽

Thin Layers ◽

Plasma Focus Device ◽

Axial Distance ◽

Micro Hardness ◽

Sem Images

This study focuses on effects of number of shots and the distance from the top of anode on Mo–N deposition process on the surfaces of AISI304 samples using a low energy (2.8 kJ) plasma focus device (AECS PF-1) at room temperature. The structural, morphological, elemental composition, surface roughness and micro-hardness properties of treated surfaces were investigated versus the number of shots and the axial distance from the anode. The obtained XRD spectra show that some of the treated surfaces were in crystalline phase with [Formula: see text]-Mo2N (FCC) structure (at 3 cm with 10–40 shots and at 5 cm with 30 and 40 shots) and some others had amorphous structure at 5 cm with 10 and 20 shots and at 7 cm with 10–40 shots. SEM images indicate that the thermal effect occurred at 3 cm and the deposition process of Mo–N at 5 cm and 7 cm from the anode with an increase in number of shots. The atomic ratio for nitrogen was 10.62%, 12.88%, and for molybdenum it was 0.23%, 3.36% at 3 cm, respectively. The atomic ratio for nitrogen has achieved 14.95% and 22.17%, however, the atomic ratio for molybdenum was 2.11% and 7.17 % at 5 cm, respectively. The surface roughness and size of grains on the surface of deposited layers were investigated by AFM analysis. Furthermore, the variation in the micro-hardness of the Mo–N thin layers deposited by different number of shots at different distances from the tip of anode was explained, qualitatively, on the basis of morphological characteristics of the thin layers. The decreasing rates of hardness in the case of 10 shots were 146%, 117% and 112%, and at 40 shots were 237%, 149% and 141% with the increasing of distances 3, 5 and 7 cm, respectively.

Download Full-text