Materials Literature
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According to the electromagnetic characteristic of chiral metamaterials(CMMs),wave in CMMs is splitted into a left and a right-handed circularly polarized waves based on Bohren's wave decomposition scheme.By applying the continuous boundary condition on the interfaces of the sphere,the electromagnetic scattering of CM…
Vinyl ester resin possesses excellent chemical resistance.It is widely used in copper metalIurgy industry.In this paper,the general process of electrolytic refining is introduced.The characteristics of vinyl ester resin and its application cases in anti.corrosion projects are anaIyzed actording to the corrosive enviro…
The fatty alcohol was grafted onto the carboxyl group of the tussah silk fabric by lipase enzymatic catalysis in order to improve the hydrophobicity of the fabric.The results showed that the longer the hydrocarbon chain of the fatty alcohol,the higher the grafting percentage and the lower the mole grafting rate;the gr…
Studies of synergetic irradiation effects and liquid lead-bismuth eutectic(LBE) corrosion/embrittlement effects on ferritic/martensitic(F/M) steels are of great importance for developing high power spallation neutron targets(1 M W) such as the European Spallation Source(ESS) and Accelerator Driven System(ADS) faciliti…
In order to study the application of V-N microalloying in low carbon bainite steel,effects of tempering temperature on microstructure and mechanical properties of a ultra-low carbon bainitic steel microalloyed by vanadium and nitrogen was investigated by means of TEM,SEM and EDS analysis.The results show that the yiel…
The electrodes of a cochlear implant are located far from the surviving neurons of the spiral ganglion, which results in decreased precision of neural activation compared to the normal ear. If the neurons could be induced to extend neurites toward the implant, it might be possible to stimulate more discrete subpopulat…
The rapid degradation of biomedical poly(lactic acid) by alkaline solution was studied. The impact of simulated physiologic solution, strong and weak alkali, different concentration of strong alkali on the degradable effect were analyzed by comparing properties of poly(lactic acid) in varies degradation periods. It wa…
TiO2 nanoparticles modified by DTMS are prepared by the liquid phase deposition method. The influence of modifying temperature and time,and the content of silane coupling agent on the surface modification are studied. The TiO2 nanoparticles are characterized by FT-IR,and TEM. The results show that the highest lipophil…
A new kind of terminated polyether modified silicone surfactant(TPESS) was synthesized by hydrosilylation of the bis-dimethylhydrogen siloxyl-terminated polydimethylsiloxane(PHMS) with allylpolyoxyethylene ether(FAE-10) in the presence of a platinum catalyst.The optimum experimental conditions were studied.The experim…
12%Cr heat-resistant steel used in the ultra supercritical set blade was quenched and tempered by vacuum heat treatment furnace,whose room temperature mechanical properties and metallographic structure supply the specific requirements.However,the high-temperature short-time lasting performance generates the dispersion…
The intrinsic relationship between molecular chain length and the probability of chain reaction during poly(lactic acid)(PLA) hydrolysis was investigated by Monte Carlo simulation. The chain reaction rate was calculated by introducing a power function of different molecular chain lengths. The hydrolysis of both amorph…
Tests to contrast Graft clothing made abroad and Great White Shark clothing made in China were conducted.By a traditional way,the qualities of sliver and yarn produced by these two kinds of clothing were examined.It was found that the overall qualities of sliver and yarn produced by the Great White Shark clothing was…
Cold metal transfer(CMT) is a new technology of metal inert gas welding in which numerical power supply and precise process control technology is adopted.With this technology,welding heat imput can be reduced significantly,so welding residual stress and welding deforming are moderated.In this paper,through CMT welding…
Chemical washings of pigment yarn-dyed denim with four methods of hydrogen peroxide washing(H2O2 bleaching),hypochlorite washing(NaClO bleaching),potassium permanganate washing(KMnO4 bleaching) and cellulase washing(enzyme bleaching)are carried out.Effects of washing methods on K/S value,air permeability,breaking stre…
Using the pulse electroacoustic(PEA) method,we investigated accumulation characteristics of space charge and influential factors(mass fraction of water and temperature) in oil-impregnated thick pressboards(0.5~2 mm thick) under low electrical field values(5 kV/mm).Moreover,we adopted the thermoelectric stimulated curr…
The geometrical configuration of(AP)Ge(Ⅱ) complex is optimized at B3LYP/6-31+G(d) level based on a density functional theory(DFT) method.The atomic charge distribution is determined through the natural bond orbital(NBO) analyses.Frontier molecular orbits and IR spectrum of the(AP)Ge(Ⅱ) compound are discussed,respectiv…
The workpiece was processed with salt bath nitriding(QPQ) for 1.5 hours at high temperature of 645 ℃,then treated through different temperature oxidation,at the temperature of seven selected temperatures between 225 ℃ and 420 ℃.The surface hardness data of the sample was obtained:the surface hardness improved at lower…
To monitor the curing process of HTPB liner in real-time,ultrasonic longitudinal wave reflection technology and infrared spectroscopy were adopted. Liner curing state was characterized by the change of longitudinal wave velocity,acoustic attenuation coefficient and curing degree determined by infrared spectroscopy. Th…
The calcium stearate product was synthesized directly by one-step of stearic acid and calcium hydroxide in the state of aqueous medium in the ordinary pressure reaction pot by certain production precess.The producing experiment showed that the reaction speed was affected by factors like the purity and fineness of calc…
The microwave drying principle,mass transfer process and heat transfer process were studied.The different wool tops were dried in the microwave drier and the experiment results were analysized.According to the technology experiment,which indicate that the microwave drying technology can be used to drying wool tops.Aft…