Materials Literature
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In this paper, we explored the relationship between thermal aging and the residual stresses developed within a thermal barrier coating (TBC) and the underlying thermally grown oxide (TGO). Superalloy model specimens (CMSX4) with a curved geometry designed to simulate key features of turbine blades coated with air plas…
The bending properties of high strength precipitation-hardening AA6016-type Al alloy thin sheets in pre-aged T4P temper state were studied in this work. Microstructural features like grain boundary particles distribution and volume fraction of the matrix strengthening phases were considered as factors controlling the…
The sol-gel La0.7Sr0.3MnO3shows a very small dc magnetoresistance (ΔR/R0= -3.5%) under H=10 kOe at room temperature. However, a giant magnetoimpedance (GMI effect) of ΔZ/Z0= -21.3% at 100 kHz and a huge ac magnetoresistance of ΔR/R0= -52% at 1 MHz could be obtained for La0.7Sr0.3MnO3sol-gel manganite under a low field…
This paper focuses on grain motion during superplastic deformation in TZP (Tetragonal Zirconia Polycrystal) ceramics. After estimation theory for random force was developed, the kinetic data of grains were stochastically analyzed, and random force acting on grains was estimated: At an earlier stage of superplastic def…
A new rhodate, Bi(1.4)CuRh(5)O(11), with an hitherto unknown channel structure containing undulating layers of RhO(6) octahedra sharing corners and edges has been discovered and its structure refined from single crystal X-ray diffraction data. The channels contain Bi(3+), Cu(2+), and some O strongly bound to Cu. The C…
Due to its exceptional range of properties and low cost polypropylene (PP) fibres are nowadays widely used in modern industry. Among the interesting application belongs the fibre-reinforcement of concrete which is used to improve the mechanical properties as toughness, tensile strength and flexural ductility of concre…
In the present study, the mixed-mode fracture toughness of an adhesively bonded composite joint system was examined using a variety of linear elastic fracture mechanics (LEFM) based tests. These tests include the mode I double cantilever beam (DCB), mixed-mode asymmetrical DCB (ADCB) and mode II end load split (ELS) t…
Abstract The fluorescent amphiphilic block copolymer methoxy poly(ethylene glycol) (mPEG)‐b‐poly(ethyl cyanoacrylate) (PECA)–2‐(N‐carbazolyl) ethyl methacrylate (CzEMA) was synthesized via living oxyanion‐initiated polymerization. mPEG‐b‐PECA–CzEMA was characterized by gel permeation chromatography, 1H‐NMR, and Fourie…
In this paper, the Ansoft high-frequency structure simulation (HFSS) was adapted to investigate the unloaded quality-factor value of the radio-frequency (RF) receiving resonator. This paper focused on the materials aspects, and a comparison between electromagnetic stimulations and measurement was conducted. A 40 mm in…
One can predict the thermal emission spectrum of any material from the knowledge of its absorbance and its temperature: this is the Kirchhoff–Planck law. We show that if McCumber’s relation holds and if the spatial distribution of the excited state is uniform, the Kirchhoff–Planck law can be generalized by introducing…
The noncollinear magnetic ground state in CeFeAsO has been investigated using the density-functional theory. When the spin-orbit coupling is discarded, the magnitude of the Ce-magnetic moment (0.87\ensuremath{\mu}${}_{\mathrm{B}}$) is independent of the spin direction and is in accordance with the experimental value o…
As an employment of surface plasmonic effect, the consequence of insertion of a layer of Ag clusters into polymer solar cell on the enhancement of light absorption and power conversion efficiency is investigated. Optical analysis based on the finite-difference time-domain (FDTD) is performed with experiments to evalua…
Effect of tensile dwell on low cycle fatigue of cast Inconel 792-5A is studied in symmetrical strain cycling at 800°C. Cyclic hardening/softening curves, cyclic stress-strain curves (CSSC) and fatigue life curves were obtained in continuous cycling and in cycling with tensile dwells. Dwells have slight effect on harde…
In this study, automatic system for combinatorial synthesis of nanoparticles (NPs) was developed and optimization of reaction parameter for NPs synthesis was performed. Microreactor was employed for kinetic control constantly. Programmable equipments were employed for additional speed up and used a microreactor. Six r…
Shape memory alloy (SMA) reinforced composites have been widely used in aerospace engineering fields. In this paper, four basic assumptions were presented to simply the research model based on the Eshelby’s equivalent inclusion method and Mori-Tanaka scheme. Based on the three-phase equivalent system and two-step equi…
The aluminum mesh/plate bumper was designed by improving on AL-Whipple shield, and a series of hypervelocity impact tests were practiced with a two-stage light gas gun facility at Harbin Institute of Technology. Impact velocities of Al-spheres were varied between 3.5km/s and 5km/s. The diameters of projectiles were 3.…
The phenomenon of the Lamb wave interaction with fatigue crack in Al2024-T3 sheet was investigated at cyclic loading. Mentioned effect is associated with the crack open/close that change acoustic impedance of a crack. Analytical simulation of fatigue crack opening using the generalized Dugdale’s model of a crack in th…
With boron-rich slag, silica fume, bauxite chalmette, carbon black and α-Si 3 N 4 as starting materials, α-Sialon powders were prepared by carbothermal reduction-nitridation(CRN). Different contents of α-Si 3 N 4 addition were added to investigate the α-Sialon formation as a function of α-Si 3 N 4 addition from boron…
Abstract Thermionic and field electron emissions governed by Richardson–Dushman and Fowler–Nordheim equations, respectively, normally coexist under typical experimental conditions. However, some carbon‐based cathodes demonstrate deviations of temperature dependencies of the current–voltage characteristics from those p…
In this paper, Fe-Mn-Cu-Co spinel materials with high infrared radiation property were prepared by doping TiO2. The microstructure and infrared radiation with different doping contents of TiO2 were studied. The results show that infrared radiation of spinel materials were increased by doping TiO2 and the infrared abso…