Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Micro-sized spherical aluminium particles deposited as slurry by brushing or spraying on a substrate alloy oxidise at high temperatures to form a top coat from sintered hollow alumina spheres whilst forming an aluminised diffusion zone. The top coat has the potential to be effective as a thermal barrier by gas phase i…
A Coprecipitation Method Was Applied to Synthesize Al2O3/GdAlO3 Compound Powder, Using Ammonia as the Precipitator. Gadolinium Oxide and Aluminium Nitrate Were Used as the Raw Materials with the Eutectic Ratio( 77 mol% Al 3+ – 23 mol% Gd 3+ ). the Precursor Was Calcined at Different Temperatures from 1200 to 1600 °C.…
The most important interband transitions and the local charge neutrality level (CNL) in silicon carbide polytypes 3C-SiC and nH-SiC (n = 2–8) are calculated using the GW approximation for the self energy of quasiparticles. The calculated values of band gap E g for various polytypes fall in the range 2.38 eV (3C-SiC)-3…
Primary solidification phase and lamellar orientation are investigated in Ti-45Al-7Nb alloy at very high ratio of temperature gradient to growth rate (G/v) by a liquid-metal-cooled directionally solidified method. It shows that Ti-45Al-7Nb alloy solidifies with primary a phase. Longitudinal (parallel to growth directi…
Silicon nanocrystal (Si-NC) luminescent down-shifting materials for photovoltaic (PV) applications were fabricated by ion implantation and plasma-enhanced chemical vapor deposition (PECVD). The absolute optical conversion efficiency of the Si-NC-emitted photoluminescence was measured using conventional methods, and an…
Aços inoxidáveis duplex (AID) são caracterizados por apresentar interessante boas propriedades mecânicas e resistência à corrosão, possuindo um vasto campo de aplicação na indústria química e petroquímica. Geralmente, os reparos dos equipamentos ou estruturas são realizados por soldagem, sendo importante a seleção de…
We performed soft X-ray resonant scattering at the MnL 2,3- and OK edges of YMn2O5. While the resonant intensity at the Mn L 2,3 edges reflects the magnetic order parameter, the resonant scattering at the O K edge is found to be directly related to the macroscopic ferroelectric polarization. The latter observation rev…
We report on light-induced degradation (LID) of multicrystalline solar cells made of upgraded metallurgical-grade (UMG) silicon. Cells made of wafers from various locations in an UMG ingot were subjected to LID study. We investigated the kinetics of the LID by measuring changes in the solar cell performance parameters…
The measurement error of core loss by general AC meter method is very large, especially when the impedance angle of the core is closed to 90°. The DC meter method was adopted in this paper. The basic idea is to transform the input DC voltage into a PWM voltage exciting on the magnetic core by a DC/AC circuit, and the…
TiO2 films were prepared using a paste mixture of titania and size-controlled squid ink particles that was used to manufacture macroporous electrodes in a dye-sensitized solar cell (DSSC). The sintering procedure at 450 °C decomposed the ink particles, thereby increasing the porosity of the structure in the films. An…
Accelerated temperature and voltage stress tests were conducted on embedded planar capacitors with epoxy–BaTiO3 composite dielectric. The failure modes were found to be a sudden increase in the leakage current across the capacitor dielectric and a gradual decrease in the capacitance. The failure mechanisms associated…
In this paper we introduce Borrmann Spectroscopy as a method for measuring X-ray absorption spectra under conditions of an exotic wave field, namely, a coherent superposition of two plane waves. The essential features of the Borrmann Effect (also known as anomalous transmission) are outlined. We show that the Borrmann…
Strontium (Sr) is a material with low-absorption bands in the extreme ultraviolet (EUV), which makes it a potential candidate for band pass filters and multilayer coatings. Yet, a better knowledge of the optical properties of Sr is required for these developments. The optical constants n and k of Sr thin films have be…
Abstract Fracture modes of cover glass of smartphones and tablet PCs were determined through fracture analysis. As a result, evaluation methods corresponding to two dominant fracture modes, edge fracture and surface fracture, were determined. Finally a guideline of chemical strengthening parameters for mobile display…
Identifying partial discharge (PD) phenomena in power transformers is the key to achieve proper maintenance actions. In order to tag a recorded PD pattern obtained from either on site testing or monitoring as, e.g., internal, surface or corona discharges, a diagnostic database has to be built first. This database woul…
The present study proposes a simple numerical simulation technique for the split Hopkinson pressure bar (SHPB) and then investigates the experimental conditions for composite materials in a tensile-loading SHPB. The following issues were investigated through experiment and numerical simulation: (i) the effects of the…
This paper proposes a novel control strategy for three-phase active power filter based on Lyapunov's stability theory. First, the active power filter is modeled in the stationary abc frame and then the model is transformed to the rotating dq frame with the aim of reducing the control complexity. Then we form an energy…
Multipotent stem cells have been shown to be extremely useful in the field of regenerative medicine. However, in order to use these cells effectively for tissue regeneration, a number of variables must be taken into account. These variables include: the total volume and surface area of the implantation site, the mecha…
Ultrasonic investigation of ZnSe:Cr2+crystal was carried out at low temperatures in magnetic field applied along the wave vector. The observed anomalies in magnetic field dependences of attenuation and wave number evidence for existence of resonant transitions between the energy levels of the Jahn-Teller tetrahedral c…
A novel SiO(2)-deposited CaF(2) (SiO(2)/CaF(2)) substrate for measuring vibrational sum-frequency generation (SFG) spectra of silane-based chemisorbed monolayers in aqueous media has been developed. The substrate is suitable for silanization and transparent over a broad range of the infrared (IR) probe. The present wo…