Materials Literature
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To explore method of improving mechanical properties for magnesium alloy welding joint,TIG welding was applied to butt AZ31B magnesium alloy plates with the same composition filled wire,specimens cut from test piece of butt welding were heated up to 350℃ by a special ceramic electric heater,then experiments have been…
A drug-inorganic composite involving an norfloxacin intercalated Mg-Al layered double hydroxides was prepared with coprecipitation and ion-exchange methods.Mg2Al-NO3-LDHs were prepared by coprecipitation methods.Norfloxacin pillared hydrotalcite was synthetized by ion exchange method with Mg2Al-NO3-LDHs as raw materia…
The composite materials of PANI/CNTs were prepared by the in-situ polymerization.Scanning Electronic Microscopy(SEM),Fourier Transfer Spectrum(FTIR) and Raman Spectra are used to observe the micro-morphology of the PANI/CNTs composites and illustrate there is some interface action between PANI and CNTs.The electrical…
Taxonomic composition,distribution and cell densities of phytoplankton community of Niyang River were investigated in August 2009.The phytoplankton was mainly composed of diatom,204 taxa belong to 24 genus(including variations) were observed.Relative abundances of most taxa were low,dominant species were not outstandi…
To improve NO removal efficiency of low temperature SCR catalyst,a series of ferromanganese catalysts were prepared with the method of self-propagating high-temperature synthesis(SHS).The performance of catalyst in DeNO reaction was evaluated and the influences of active components and liquid ignition temperature were…
Driving gears are key components to ensure the running safety of automobiles, and the tests of the microstructure properties of gears are the important guarantee of its quality control. Aiming at carburized gears for heavy duty trucks, the paper in detail studied the testing methods and demand of the chemical composit…
The effect of transformer oil flow rate on the permeation properties of fault gases in the ceramic/Teflon-AF2400 composite membrane was studied and permeation characteristics of the fault gases in the dissolved state and the gas state were compared.When the oil flow rate speeded up from 250 mL/min to 750 mL/min,equili…
The IEC recommended some different artificial contamination methods to investigate the pollution flashover characteristic,but no difference between the methonds was described.Thus,to investigate the difference,taking an XZP-300 porcelain insulator as a test sample,we experimentally studied the pollution flashover char…
Tumor is one of the major diseases that endanger human health.In recent years,it was found that inducing tumor cell apoptosis is more ideal tumor treatment.Sonodynamic therapy is a promising new technique for killing tumor cells based on the synergistic interactions of ultrasound and sonosensitizers.Studies have shown…
Co powder was introduced into Ni-Ti-Cr-C compound welding powder to prepare Co-Ni-Ti-Cr-C welding rods. Co-Ni-Ti-Cr-C cladding coating was then prepared by tungsten inertia gas compound welding. The phase composition, microstructure, component distribution and microhardness distribution along the cross-sections of the…
In this paper,the numerical studies of three-dimensional flow field in four-roller compact spinning with airflow guiding device are investigated by using Fluent Software.The laws of airflow in fiber-converying zone are given with three different installation position of airflow guiding device,which provides a theoreti…
A AZ91 magnesium alloy vehicle steering control arm was used to prepare by casting-forging combined forming,the microstructure and mechanical properties of the control arm′s main force parts were studied and the tensile fracture was analyzed.The results show that the deformations were different in different zones of A…
According to the phenomenon of pen-tip shape and wedge shape fracture occurred in the process of C72DA wire rod drawn,the wire rod chemical composition was analyzed.Combining the method of microstructure with SEM observation,the reason of wire rod fractures was researched.Results show that C72DA wire rod improper roll…
The present research status and progress of non-aqueous electrolyte of lithium-ion battery was reviewed from aspects of lithium salt,organic solvent and additive.The related research was greatly promoted by molecular design combined with theoretical calculation based on quantum chemistry.It was a key obstacle to obtai…
Environment humidity and geometrical parameter have the important effect on the mechanical characteristics of honeycomb paperboards.The impact compression of honeycomb paperboards is investigated by using the experiment and finite element method,and the impact load carrying capacity and energy absorption ability are o…
We researched the vector control based on current hysteresis control for cascaded inverter.The control pulse was produced by single polarity current hysteresis control which was similar to single polarity SPWM modulation.The phase-shifted control pulse for multi H bridges of a phase with current hysteresis control cou…
Single compression tests were carried out for Nb-Ti and Nb-Ti-Mo microalloyed steels by using MMS-300 thermal simulation tester.The hot deformation behavior of the steels and the effects of Mo and deformation conditions on dynamic recrystallization had been studied.The dynamic recrystallization activation energy and t…
Since the opacifier-loaded silica aerogel composites have strong ability to inhibit radiant heat transfer compared to the pure silica aerogel,they can improve effectively the insulation performance at high temperature conditions and have been used extensively as thermal insulation materials in a variety of industrial…
A molecular kinetic model for catalytic pyrolysis process of FCC gasoline in a pulsating reaction-chromatograph equipment was developed by the structure-oriented lumping(SOL)method combined with Monte Carlo(MC)simulation.SOL was applied here to describe the structure of hydrocarbons and establish reaction network.Seve…
Alcoholysis degree of polyvinyl alcohol(PVA) has significant impacts on its properties and applications.In the paper,the effects of mole ratio of NaOH to polyvinyl acetate(PVAc),concentration of NaOH,concentration of PVAc polymeric solution,alcoholysis reaction temperature and reaction time on the alcoholysis reaction…