Materials Literature
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The kinematic control of guide rollers was a key and difficult point in special-section chemical flange rolling process.Based on the volume invariant principle,the guide rollers' locus was calculated by mathematical software MATLAB,then the data was imported to ABAQUS simulation software,and the radial ring rolling pr…
The complex of molybdenum(Ⅵ) peroxo glycine was synthesized by solid-liquid state reaction with molybdenum trioxide and glycine as starting materials.The composition and structure of the complex was characterized by means of elemental analysis,UV spectra,infrared spectra,thermogravimetry-differential scanning calorime…
Series of Sm3+-doped(Ba,Sr) TiO3/(Ba,Sr) Nb2O6 composite ceramics were synthesized by sol-gel method.XRD patterns showed that the samples consisted of perovskite phase and tungsten bronze phase.With the increasing of doping amount of Sm,the sample diffraction peaks move to small-angle direction,which indicates that Sm…
Influence of heat treatment on wear resistantce of NiTi60 alloy was investigated throngh optical metallgraphic examination and microhardness examination.The result indicates that the microhardness of wear resistant NiTi60 alloy has obviously changed over different heat treatment.When treated at 800℃×30min /WQ+300℃×15m…
Cationic imidazole-blocked polyurethane(CBPU) was prepared from the raw materials of isophorone diisocyanate(IPDI),polycaprolactone glycol,methyldiethanolamine(MDEA),ADH,bisphenol A,N-[(1,1-dimethyl-2-acetyl) ethyl]-β-dihydroxyethylamino propanamide(DDP),using imidazole as the blocking agent.Fourier transform infrared…
Changes of physiochemical and microbial properties of raw vinegar before and after the treatment of ultrafiltration membrane with molecular weight cut-offs of 1×105 or 2×105 were studied.The results showed that more than 90% of total acid,amino nitrogen and salt-free solids were kept while the total microbial count an…
According to magnetism variety of the deformation-induced martensite,the deformation-induced martensite content was tested with MP30E-S type ferrite measurement instrument,for the bellows made of SUS304 and SUS316L austenite stainless steel separately formed by machine-bulge method,and bellows made of SUS304 austenite…
A method of computing the rotor eddy current loss in the asynchronous frequency conversion motor was proposed based on the finite-element method.This method has the ability to calculate the eddy current loss for rotor by node calculation and the division of the excitation winding.The losses of the rotor and the stator…
The effect of cryogenic treatment on comprehensive properties including microstructure,mechanical property,fatigue property,anti-corrosion property and residual stress of 2024 aluminum alloy has been investigated.The results show that the comprehensive properties of 2024 aluminum alloy have been optimized while the al…
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…