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Good oxidation and corrosion resistance are required for cutting tools and other industrial components used in high temperature applications. The highest operational temperature of CrN is normally about 500 °C. A denser Cr–N coating prepared by high power pulsed magnetron sputtering – plasma immersion ion implantation & deposition shows oxidation resistance up to 800 °C compare with those prepared...
Effects of the carrier concentration on the dielectric function of indium tin oxide (ITO) films were investigated by spectroscopic ellipsometry using Tauc–Lorentz and Drude oscillator terms. The real and imaginary parts of dielectric function values increased with increasing carrier concentration. Samples with lower refractive indices had (440) preferable crystallographic orientations. A more significant...
The flow of gases into high vacuum through a short micro-tube of 20.5 μm diameter and 15 μm length has been measured for inlet pressures up to 1 atm. At low pressures molecular flow is found to be augmented by an additional mode of gas transport, whose contribution increases linearly with both inlet pressure and the molecular weight of the gas. This additional mode of transport is ascribed to the...
The recovery of titanium from the slurry formed in crude titanium tetrachloride and recycling of NaCl–AlCl 3 was studied. Experimental results showed that the titanium contained in the slurry can be effectively recovered by reactive distillation with molten NaCl–AlCl 3 . More than 99% of titanium was volatilized from the slurry by distilling at 453 K for 40 min with slurry to molten...
Nickel coated Zr–V–Fe non-evaporable getter (NEG) powders were prepared using electroless plating. The microstructure and composition of the Ni-coated Zr–V–Fe powder were analysed through XRD, SEM and EDS. The H 2 , CO, CH 4 absorption performance of Ni-coated Zr–V–Fe powders was analysed by dynamic method after an activation at 160 °C for 2 h. Ni-coated Zr–V–Fe powder and as-prepared...
Alumina-silicate composite coatings were formed on titanium substrate by plasma electrolytic oxidation (PEO) process using a silicate-based electrolyte containing alumina nanoparticles. Microstructure, chemical and phase compositions, and thickness of the coatings were investigated to determine, coating mechanism and probable reactions during the process. The effect of processing time on corrosion...
Supported bimetal phosphide (NiCoP/SiO 2 ) catalysts with variable Ni/Co mole ratios at low temperature were synthesized by a novel route using sodium hypophosphite (NaH 2 PO 2 ·H 2 O), nickel acetate (Ni(AC) 2 ·4H 2 O) and cobalt acetate (Co(AC) 2 ·4H 2 O) as materials. The structure, composition and properties of the as-prepared catalysts...
Microporous nitrogen-doped carbon layers are deposited using an atmospheric-pressure plasma jet at room temperature. The cytocompatibility of the microporous nitrogen-doped carbon layer is investigated by monitoring the proliferation and adhesion of MC3T3-E1 preosteoblasts. The composition and chemical states of the polymer coatings are characterized by Fourier transform infrared spectroscopy (FTIR),...
Graphene oxide (GO) films were treated at room temperature by inductively coupled NH 3 plasma. Oxygen functional groups on the surface of GO films were rapidly removed in less than 10 min, and nitrogen components were incorporated into the vacancies of oxygen groups. The ratio of [N/C] was reached to 9% and [O/C] was reduced from 45% to 25% within 10 min. Otherwise, the electrical conductivity...
For obtaining the heat flux distributions of the channel wall and anode directly, a plasma energy deposition model is developed through analyzing of the energy exchange of potential energy, thermal energy, kinetic energy, and ionization energy during the particle–wall interaction. And the energy deposition on the wall is obtained by coupling the energy deposition model to the PIC/MCC/DSMC hybrid method...
Single material TiO 2 was used to fabricate the double layers antireflection coating with photocatalytic property. TiO 2 layers with low and high refractive indices were prepared by the direct reactive magnetron sputtering technique and energy filtrating magnetron sputtering technique, respectively. The structure, surface morphology and optical property were tested by X-ray diffraction,...
Si/TiO 2 nano-composite and Si were coated on Mg–Ca alloy by physical vapour deposition (PVD). The surface morphology of specimens was characterised by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) equipped with energy dispersive X-ray spectroscopy (EDS) and atomic-force microscopy (AFM). The AFM results indicated that the average surface roughness of the nano-Si/TiO...
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