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In order to extend the application range of solid lubricant WS 2 , the author adopted a two-step method to prepare WS 2 film; namely, W film was first fabricated on the AISI 1045 steel by magnetron sputtering method, and then treated by low temperature ion sulfuration to obtain WS 2 composite film. XRD was used to analyze the phase structure of the WS 2 composite film;...
TiCN coatings were deposited using a large area filtered arc deposition (LAFAD) technique from Ti targets in a mixture of N 2 and CH 4 gases. CH 4 fraction was varied from 0 to 50% to change the C content in the coatings. Scanning electron microscopy (SEM), x-ray photoelectron spectroscopy (XPS), x-ray diffraction (XRD), and substrate bending method were used to characterize...
Stability tests of two quadrupole mass spectrometers (QMSs) were performed using a two-stage flow-dividing system from the following viewpoints: (1) fluctuation and drift of ion current, (2) repeatability of ion current, (3) change in ion current owing to prior conditions of use, (4) long-term stability of sensitivity, and (5) interference effect. These tests were performed at the pressure from 8 × 10...
Highly conducting AZO/Cu/AZO tri-layer films were successfully deposited on glass substrates by RF magnetron sputtering of Al-doped ZnO (AZO) and ion-beam sputtering of Cu at room temperature. The microstructures of the AZO/Cu/AZO multilayer films were studied using X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM) and atomic force microscope (AFM). X-Ray diffraction measurements...
ZnO thin films were prepared by reactive RF sputtering on thermally oxidized Si for gas sensing applications. Three VOC vapors were chosen to investigate the response behavior of the prepared ZnO. Acetone, isopropanol and ethanol were tested, and the sensitivity of the sensor toward acetone was the highest (S ∼ 100) for 500 ppm acetone at 400 °C. The largest sensitivity was achieved at 400 °C for...
Diamond-like carbon (DLC) films were deposited on the inner surface of 304-type stainless steel tube with an inner diameter of 10mm by DC glow discharge plasma. The influence of the deposition time, pressure and the ratios of CH 4 in CH 4 /Ar gas mixture on the DLC film deposition were investigated. The images of Scanning Electron Microscopy (SEM) show that the DLC films are featureless...
The films containing C and about 80%SiC were deposited by R F. magnetron sputtering followed with argon ion beam bombardment to enhance the adhere strength of the substrate and then were introduced hydrogen by using hydrogen ion irradiation or high pressure permeation techniques. XPS was used to investigate the sub-surface of these C–SiC films. The results show that, apart from carbon adsorbing hydrogen,...
Amorphous indium zinc oxide (IZO) thin films were prepared on glass substrates by dc magnetron sputtering at room temperature. The resistivity of IZO films could be controlled between 3.8 × 10 −3 and 2.5 × 10 6 Ω cm by varying the oxygen partial pressure during deposition, while keep the average transmittance over 83%. With IZO films as channel layers, whose surface root-mean-square...
Transition metal nitrides coatings are used as protective coatings against wear and corrosion. Their mechanical properties can be tailored by tuning the nitrogen content during film synthesis. The relationship between thin film preparation conditions and mechanical properties for tungsten nitride films is not as well understood as other transition metal nitrides, like titanium nitride. We report the...
TiN/TiC multilayer films were deposited on high-speed-steel (HSS) substrates using pulse biased arc ion plating. For comparison, TiN and TiC films were also deposited. Scanning electron microscopy (SEM), X-ray diffraction (XRD) and Auger electron spectroscopy (AES) were applied to investigate the modulation period thickness, microstructure and content depth distribution of the films, respectively...
Thin films of the glasses Ge 10 Se 90−x Te x (0 ≤x≥ 40) have been prepared by melt quenching technique; thin films were evaporated at a pressure of ≈10 −4 Pa. The optical absorption behavior of these thin films was studied from the reflection and transmission spectrum in the spectral range 200–1200nm. The optical constants i.e optical band gap (E opt ), absorption...
TiO 2 /SiO x /TiO x multi-layers on quartz glass were prepared by electron-beam evaporation method and their structural and photocatalytic properties were investigated. The photocatalytic activity of the TiO 2 /SiO x /TiO x multi-layer was evaluated by the photodecomposition of methylene blue in aqueous solution. As the thickness of the SiO x ...
We investigated the effect of surface hardening and micro-structural modifications in Mild steel (MS) with the addition of Boron Carbide, melted by thermionic electron beam. Boron Carbide in the form of powder was added by making grooves in MS samples to trap the molten solution for interaction with solid particles. These samples were irradiated by 10 KeV electron beam with variable beam current (50–100 mA)...
This paper presents a new suction method used for wall-climbing robots. The basic idea of this method is that the vacuum can be generated inside a suction cup attaching on a surface, if the suction cup is directly driven by a periodically vibrating force. In this paper, two types of vibrating forces are proposed, one in sinusoidal mode, and the another in square wave mode. Based on Bernoulli’s equation,...
The general model for describing the working process of dry scroll vacuum pump (DSVP) has been presented previously by the author. The working process of DSVP can be simulated by this model. In order to verify the simulated results, the dynamic pressure measurement was introduced to DSVP. The related test and design methods were also discussed. The pressure-orbiting angle diagrams for different suction...
The influence of various filler metals on the mechanical properties of 17mm thick Ti–6Al–4V electron beam welded joints has been analysed. Autogeneous welded joints exhibit higher toughness when compared to the parent plate but this improvement was less marked than that observed in plasma arc welded joints. To achieve better toughness, without suffering unacceptable losses of strength, different morphologies...
This paper reports the successful deposition of CuIn 5 S 8 and Cu 2 SnS 3 thin films obtained on Pyrex glass substrates using annealing in a sulfur atmosphere at 550 °C during evaporation of copper on In 2 S 3 and SnS 2 sprayed thin films, respectively. The CuIn 5 S 8 and Cu 2 SnS 3 thin films crystallize in cubic...
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