Materials Literature
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The propagation of an operational fatigue crack in the roller of a continuous-casting machine is analyzed. The degradation of the surface is determined by sclerometry. The fracture of 25Kh1M1F steel is investigated, and the influence of the operating time on the steel’s fatigue strength is established.
Grain size is an important microstructural feature of materials; it contributes to its mechanical and physical properties. Quantitative information of three-dimensional topological evolution during the three-dimensional normal grain growth process is very rare. In this work, an isothermal Monte Carlo procedure is appl…
The tool-chip friction coefficient influences the simulation result of the residual stresses distribution seriously when Finite element software is used to simulate. This paper presents a new tool-chip friction coefficient estimate approach. Frist, a new mathematical model of cutting forces, the cutting speed, feed am…
A new mechanism for long range effect is proposed in this study. The decreased density region in the vicinity of dislocations or grain boundaries acts as a gradient waveguide for hypersound phonons generated in the sample oxide layer. As a result of this the elastic wave is conveyed to the sample’s back side with smal…
Distillation purification of praseodymium and neodymium is considered. The possibility of a marked increase in the purity of these metals is demonstrated. The efficiency of the distillation process for the purification of Pr was estimated thermodynamically. The pure rare-earth metals were used in synthesizing intermet…
Abstract A combination of two bridged bis(2-pyridylmethyl)amine-type ligands offered efficient separation of lanthanoid tris(β-diketonates) complexes. The employed ligands bridged two lanthanoid tris(β-diketonates) to form crystalline ternary complexes. Since the complexes containing larger lanthanoid centers were pre…
In this study, we investigated high-efficiency InGaN/GaN light-emitting diodes (LEDs) grown on sapphire substrates with SiO2 nanorod arrays (NRAs) of different heights. The GaN film showed an improved crystal quality through X-ray diffraction (XRD) full-width at half-maximum (FWHM), photoluminescence (PL), and cathodo…
Higher manganese silicide is one of the promising thermoelectric materials for waste heat recovery at medium temperature (500-700°C). Improvement on thermoelectric performance of bulk thermoelectric higher manganese silicide MnSi1.75is introduced by externally mixing 1 at% nanostructured MnSi to MnSi1.75. This method…
nanohydroxyapatite (nHA) and collagen were utilized to fabricate the bio-inspired organic-inorganic composite coating (OICC) via the Drop-on-Demand (DoD) micro-dispensing technique, which could flexibly construct multi-layer structures with varied materials composition within a layer and /or among layers reliably. Thi…
Isothermal cross sections of amorphous separation diagrams of the ternary systems poly(ɛ-caprolactone)- co -poly(acryl methacrylate) Eudragite RS-methylene chloride and poly(ɛ-caprolactone)- co -poly(acryl methacrylate) Eudragite E-methylene chloride are obtained via the experimental methods of turbidity points and an…
Formation behavior of texture during high temperature compression of AZ80 is investigated on the specimens produced from the extruded bar and rolled plate. Special attention is paid on the formation of (0001) (compression plane) texture. Before deformation, (0001) is distributed frequently parallel to the compression…
In this study, we propose a simple method to design binary masks (BIMs) at an extreme ultraviolet (EUV) wavelength for lithography and at a deep ultraviolet (DUV) wavelength for inspection. We study the optimum optical constant (refractive index and extinction coefficient) for low reflectance and categorize SnTe, ZnTe…
Electronic products are subjected to high G-levels during mechanical shock and vibration. Failure-modes include solder-joint failures, pad cratering, chip-cracking, copper trace fracture, and underfill fillet failures. The second-level interconnects may be experience high-strain rates and accrue damage during repetiti…
The present work strives to evaluate the corrosion resistance of aluminum alloy (AA)6061-T6 (UNS A96061) pretreated with bis-1,2-[triethoxysiyl]ethane silane (BTSE) solution containing different contents of yttrium oxide (Y2O3) nanoparticles. The corrosion resistance of the pretreated AA6061-T6 substrates was investig…
Mg-Zn-Nd master alloys containing spherical quasicrystal phase were prepared under conventional casting conditions. The microstructures and phases of Mg-Zn-Nd ternary alloy have been investigated by means of scanning electron microscopy (SEM), X-ray diffraction (XRD) and energy dispersive spectrometer (EDS). The resul…
A new conjugated alternating donor-acceptor copolymer is synthesized from perylene diimide and the benzodithiophene derivative via the Suzuki reaction. Temperatures corresponding to the 10% weight loss of the copolymer in air and argon are 336 and 362°C. The copolymer is soluble in common organic solvents. The maxima…
Segregation in granular materials has been studied by means of Monte Carlo simulation. The mechanism of segregation in a binary mixture of particles with different sizes and densities has been investigated for shaking and rotating processes in two-dimensional space. From the simulations we have obtained the segregatio…
The layout of a technological process including catalytic steam and carbon dioxide reforming and Fischer-Tropsch hydrocarbon synthesis is presented. The inclusion of catalytic stages in plasma technologies provides the possibility to intensify conversion processes, enhance their depth, and obtain various gaseous and s…
In this work, layer structured silicon suboxide/gold/silicon suboxide (SiOx/Au/SiOx) films were prepared by using plasma enhanced chemical vapor deposition assisted with hot wire evaporation technique. Post rapid thermal annealing (RTA) process was done on the as-prepared films for 100, 500 and 700s at constant temper…
Microarc oxidation (MAO) coatings were prepared on AZ91D magnesium alloy in a novel dual electrolyte containing various concentrations of sodium citrate (C6H5Na3O7). The surface and cross-sectional morphologies, coating thickness and surface roughness were characterized by scanning electron microscopy (SEM), layer thi…