Materials Literature
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In this paper, we study the evolution of polygonized dislocation structures and make an analysis of plastic deformation mechanisms under creep conditions at high temperatures in polygonized aluminum of 99.3% purity. Dislocations play a role of vital importance in the evolution of plastic deformation. The influence of…
Sol-gel method is used for the formation of Pb0.499Sr0.499TiO3 (PST)thin films. The initial films were prepared with spin coating sol solution on silicon wafer and drying at room temperature and then heating coated dry sol film at 400°C for 10min. This process was repeated for 1-4 times to obtain 4 initial films with…
The paper is focused on themodeling of inelastic behavior of porous aluminiumfoams with closed cells. Very thin pore walls ( 100μm) prevent conventional experimental techniques to be used for the estimation of the foam microlevel material parameters. Therefore, nanoindentation was employed as a key experimental techni…
In this study, poly(lactic acid) (PLA) resins with linear (L-PLA) and branched structure (B-PLA) were selected, and the solid state foaming technology was applied to prepare PLA foams. B-PLA foams exhibited a high expansion ratio of about 40 and cell density of 105-6\ncells/cm3, whereas L-PLA foams only had the highes…
The microstructure of SOFC electrodes is known to influence its performance across all regimes of operation. In recent years, the development and proliferation of high‐resolution tomography techniques has revolutionised our understanding of the relationship between SOFC electrode performance and microstructure. Furthe…
Mathematical modelling and numerical simulation are important tools for understanding and developing solid oxide fuel cell technology. An SOFC is a multi‐scale system, where processes on all time and length scales contribute to the observed macroscopic system behaviour. This review gives an overview of modelling techn…
Various cathode materials and cathode with different structures have been developed for SOFCs based on oxygen ion and proton conductors. Perovskite manganates such as strontium-doped lanthanum manganates are the conventional cathode materials widely used for oxygen-ion conducting SOFCs due to its stability at high tem…
By using L-Cysteine as a stabilizer, white light-emitting Mn 2+ -doped ZnSe quantum dots (QDs) were synthesized by a novel green preparation method in aqueous solution. The influences of the heating time, the Mn 2+ concentrations, the Zn/Se molar ratios, and the pH of the original solution on the photoluminescence pro…
Severe corrosion phenomenon appeared in an expansion joint of blast furnace gas (BFG) pipeline after booster fan in a power plant. The sediment adhered to the inner wall of the expansion joint was analyzed by ion chromatography. The corrosion site of expansion joint was examined by scanning electron microscope (SEM),…
High temperature proton exchange membrane (HT-PEM) fuel cell is considered as one of the most probable fuel cells to be large-scale applied due to characteristics of high efficiency, friendly to environment, low fuel requirement, ease water and heat management, and so on. However, carbon monoxide (CO) content in fuel…
Polypropylene (PP) film was used as coating to improve the hydrophobicity of corrosive aluminum surface. A micro-porous film with compound nanoparticles was obtained on the aluminum alloy substrate using the corrosion method and coated PP. The water contact angle (WCA) of superhydrophobic surface is 157°. The superhyd…
The formation of fouling in stainless steel tube was simulated in the existence of both sulfate-reducing bacteria and iron bacteria under the experimental conditions of the water temperature 30±0.2°C and velocity of 0.4m/s with the dynamic simulation apparatus of shell-and-tube circulating cooling water. The paper stu…
The studies of quantum efficiency, electronic energy distribution and stability are highly concerned in the application of Negative electron affinity (NEA) gallium nitride (GaN) photocathodes while the resolution of photocathodes are concerned rarely. The resolutions of some image intensifiers are smaller than computa…
The simulation calculation and analysis of electron back-scattering characteristics for ion barrier films (IBFs) of Al2O3 was performed by Monte Carlo methods. A physical model for the interaction of low-energy electrons with solid was described. Trajectory and spatial distribution of the electrons were simulated with…
Vanadium oxide thin films have been deposited on glass and ZnO-coated glass substrates by reactive RF-magnetron sputtering deposition at different substrate temperature. The introduction of ZnO buffer layer could increase the transmittance. The buffer layer ZnO could lead to the increase of the crystallinity quality o…
In this paper, we investigate an active layer treatment method that is referred to as solvent annealing. Organic solar cell was fabricated and an isopropanol (IPA) solvent annealing process was carried out. The experiment result should that the value of absorbance and the crystallinity is improved by isopropanol solve…
Ni-Ce-Al layered double hydroxides (LDHs) with various Ni:Ce:Al molar ratios (3: 0.1:0.9, 3:0.2:0.8 and 3:0.5:0.5) were prepared by Co-precipitation. Ce can replace Al in a wide range of Ce/Al ratios to form Ni-Ce-Al-LDH with the unique layered structure of hydrotalcite. After the calcined at 600°C, LDHs samples were…
To investigate the idle performance of a HCNG with high hydrogen blend ratios, the effects of different excess air ratios (λ) and different hydrogen blend ratios on combustion, indicated thermal efficiency (ITE) and emissions of a 6-cylinder CNG engine were investigated. The results show that, with the increase of hyd…
Cu (In, Ga)Se2 (CIGS) thin film was prepared by ion beam sputtering Cu, In, Se and evaporating Ga elements continuously on BK7 glass substrate and the 4-layer film was then annealed at 400 oC for 1h in the same vacuum chamber. The CIGS thin film is single-phase with chalcopyrite structure and has a preferential (112)…
Direct current magnetron co-sputtering was used to deposit zinc antimonide thin films on BK7 glass substrates at room-temperature. Then the films were annealed at 573 K to 673 K for 1 hour in Ar atmosphere. The results indicate that the Seebeck coefficient of the thin films increase from 30.5 μVK-1to 132.5 μVK-1 when…