Materials Literature
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The Anycasting software is casting simulation system for development of all kinds of casting process.It can simulate the mould filling,heat conduction,solidification process and stress field.The process parameters of the casting wheel hub were simulated with Anycasting software.And the process was optimized.Eventually…
The Al-doped ZnO( ZAO) films were obtained on the glass substrate by RF magnetron sputtering technique, changing the working pressure from 3 Pa to 10 Pa. The samples were characterizated by XRD,UV-visible spectrophotometer and SEM. All films showed average transmission over 85% between 400 nm and 760 nm wavelength and…
In order to establish a safe,effective and green method,the reduced-sensitivity HMX was prepared by recrystallization from ionic liquid-solvent system with solvent-nonsolvent technique,using a series of ionic liquids NO3,[mimBSO3H]NO3,NO3 and [Et3NBSO3H]NO3 as crystal assistants,acetone and cyclohexanone as solvent.Re…
The mixture of epoxy resin E-51/711 was microencapsulated following an in-situ poly(urea-formaldehyde) microencapsulation.The microcapsules were prepared successfully,and their surface was rough.The particle size distribution of the microcapsules ranged between 25 and 375 μm.Mimicking the self-repairing principle of b…
C5fraction from ethylene plant contains a large number of linear unsaturated molecules and cyclopentadiene with mass fraction of more than 16%. A light-colored petroleum resin can be obtained from reaction of C5fraction using BF3as catalyst. Cyclopentadiene should be first removed when its concentration is high,so the…
The element like Cl,Ca and Mg etc.is determined with semi-quantitative method using X-ray fluorescence standardless analysis method.Compared with traditional method,the method has the advantage of simple operation,multi-element simultaneous analysis,high precision and accuracy.It is suitable to apply on detecting salt…
An 8 mega-pixel hybrid diffractive-refractive mobile phone camera lens is designed with ZEMAX.The system includes three plastic aspheric lenses and an IR filter.The F number is 2.85 and FOV is 64.The optical total length and back focal length are 5.9 mm and 0.6 mm respectively.The MTF of the lens at the Nyquist freque…
For the purpose of optimizing hot working processes for Incoloy 800H,two-pass hot compression tests have been performed on MMS-300 thermo-simulation machine.The flow stress curves of two-pass compression under different deformation conditions have been plotted,and the effects of deformation temperature,strain,strain r…
Both domestic and foreign research status and development of machinability of high strength gray cast iron have been reviewed with analysis of existing problems at home,corresponding improvement measures and the future trends.
The corrosion behavior especially pitting resistance of TTS443 stainless steel, in comparison with 304 stainless steel, was studied by means of polarization curves and electrochemical impedance spectroscopy(EIS), in NaCl and HCl solutions respectively. The results showed that, with the increase of mass fraction of Cl-…
Several methods to produce hydrogen for proton exchange membrane fuel cells by natural gas reforming,which include steam reforming,partial oxidation reforming,autothermal catalytic reforming and catalytic cracking are introduced. The hydrogen purification methods including desulfurization,water- gas-shift,preferential…
Influence of the types and contents of the flame retardant on the pyrolysis performance of rigid polyurethane foams(PUF) was studied.The results showed that thermal decomposition temperature of PUF adding antimony trioxide was only slightly higher than the pure resin,and that of the composite material containing MPOP…
The detection sensitivity and magnetic flux leakage are decided by the magnetization of rail for fast magnetic flux leakage testing.The main work of this thesis is to make sure how speed of detection,excitation and lift-off shall affect the magnetization of rail.The magnetic field intensity between rail and yoke,ampli…
Fe-6.5%Si high silicon steel sheet was available after silicon was deposited on the surface of plain pure steel sheet with 0.2 mm heavy through PCVD,then treated at a high temperature.Analyzed the impact of deposition process parameters on the surface of the silicon content by orthogonal test,the relationship between…
The nano-TiO2 microcapsule was prepared by complex coacervation with nano-TiO2 as the core and gelatin and arabic gum as the wall.The average particle size,embedding rate,and particle size distribution variance of the microcapsules were used to evaluate the process of preparation.The impact of pH value,reaction temper…
Amorphous indium gallium zinc oxide( In-Ga-Zn-O) thin films were deposited on glass substrates at room temperature by RF magnetron sputtering method and annealed in vacuum. The effects of different annealing temperature on the structure,electrical and optical characteristics were investigated systemically. The results…
This paper briefly described the structure and application of the collagen and summarized the extraction method of collagen.The characterization method of the structure of collagen and molecular weight determination method were concluded so as to provide evidences for the application of collagen.Finally,the control of…
Portable total reflection X-ray fluorescence analyzer is applied in this article,with Sc as internal standard,determination of Cu,Zn,Cr,Fe,Mn,Co,Ni in clean water simultaneously.Under the selected conditions,the method detection limits are 3.1—5.1Lg/L.Surface water samples analysis results are consistent with ICP-Ms m…
We have investigated the process of the proton transfer in the formic acid,first obtained transition state at MP2/6-311+G(d,p)level,and then determined reaction routes(IRC)at MP2/631G(d)level.We selected nine points along with IRC.The molecular faces and the molecular interface characteristic contours of formic acid w…
To study the catalysis performance of porous chitosan supported tetrakis[4-(sodium sulfonato) phenyl]porphyrin manganese complex [Mn TPPS/CTS(p) ]for aerobic oxidation of toluene,tetrakis-[4-(sodium sulfonato) phenyl]porphyrin manganese was anchored onto chitosan by salt bond and coordinated bond.The catalyst complex…