Materials Literature
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In order to reduce the multi-phase permanent magnet synchronous motor torque ripple, this paper presents the optimal pole-arc coefficient, chamfering magnetic poles and open auxiliary slot on poles method.According to the 400kW nine-phase permanent magnet low-speed and high-torque motor, the 2D finite element simulati…
The rheological behaviors of the poly (trimethylene terephthalate/isophthalate)-co-polyethylene glycol (PTTI-PEG) were studied with Rosand RH7 capillary rheometer,which were compared with rheological properties of the common PTT and PET.The results showed that PTTI-PEG was a typical pseudoplastic fluids,its shear visc…
The differences of casting technologies on vermicular cast iron cylinder head among expendable pattern casting and the metal mold, the sand mold were analyzed, and the problems that should be paid attention to during EPC of compacted graphite cast iron cylinder head were pointed out. The production practice verified t…
The effects of the next-nearest-neighbor (t')hopping on antiferromagnetism were investigated in based on the Gutzwiller mean-field approximation method approach in the two dimensions hole-doped t-t'-J-U model and the renormalized mean field theory. The antiferromagnetism order emerges in the under doped region below t…
Based on its existing facilities,Baosteel Special Steel Business Unit has successfully trial-produced 380 mm retained mandrel blank.Techniques such as the phase diagram analysis,steel purification,inclusion control,structural morphology control and control of temperature decreasing during forging were used and proce…
We successfully synthesize the sandwich type polyoxometalate containing Ln(Ln=,PrIII) [(CH3)4NH]4Na3[Pr(PW11O39)2]·12H2O,which are 1D zigzag chain constructed from sandwich-type LnPOMs and the sodium cations.Both complexes were characterized by IRand single crystal X-ray diffractions.X-ray diffraction result reveals t…
The rare earth(Ln)was encapsulated by stearic acid(SA),dispersed in hot alcohol solution,and blended with TPU and got the anti-radiation composite materials.The modification effect of SA on the Ln powder was investigated by FT-IR,SEM,and contact angle,meanwhile the different mass ratio of SA surface modifier on the me…
The nano zinc oxide(nano-ZnO) and carbon nanotubes(CNTs),which were prepared by homogeneous precipitation method and chemical vapor deposition,were used as additives to prepare two kinds of positive nickel hydroxide electrode of nickel metal hydride(MH-Ni) battery after the CNTs and positive electrode active material,…
Flow field simulation of WPC/supercritical CO2(WPC/Sc-CO2) composites flowing through an extrusion foaming die with different die dimension was performed by FEM software Polyflow,and the effects of foaming die dimension on the cell nucleation of WPC/Sc-CO2 composites were investigated.It was found that increasing the…
Objective:This research was aimed at the electrochemical deposition employed to deposit a Nano-Ag/HAp composite coating on titanium surface.Methods:A Nano-Ag/Hap composite coating was deposited on the surface of pure titanium by electrochemical deposition.Scanning electromicroscope(SEM) and X-ray diffraction(XRD) were…
At present isothermal quenching is the most effective heat treatment which can develop the potential of nodular cast iron materials.This paper studies the influence of Austeniting temperature and the time at maximum temperature or Isothermal temperature and the time at maximum temperature on the performance of nodular…
This paper based on the data of two-stage loading glass /epoxy composite laminate fatigue life experiment,integrates unlinear damage cumulative theory to get the residual life formula of the second loading,and then popularizes to get life formula of three-stage and more stage.Compares the results get from the formula…
Computational fluid dynamics(CFD) was used to simulate electrospinning jets,POLYFLOW was chosen to simulate steady jet movement in 2D space,FLUENT was chosen to simulate insteady jet movement in 3D space,and GAMBIT was used to build geometric model and plot grid.The simulation results indicated that when solution volu…
A transparent solid adhesive rod was prepared when polyvinyl formal(PVF) was used as matrix resin of adhesives,stearic acid was used as excipient,glycerin was used as humectant,and the modifier was introduced into the systems.The influences of contents of main compositions(especially K+) in formula on performances of…
Thin film transistors based on In-Zn-Ti-O oxide channel layer were fabricated at room temperature.The atomic proportion of In,Zn and Ti in channel layer is 49∶49∶2.The device with field effect mobility of 9.8 m2/V·s,on-off ratio higher than 105 and subthres-hold swing of 0.61/dec was obtained.While compared with devic…
Taking La(NO3)3.nH2O and(NH4)2Mo4O13.2H2O as raw materials,using two methods: sol-gel technology and evaporation crystallization,molybdenum billet doped by rare earth was prepared through the reduction and powder metallurgy processes.Using SEM,XRD,TEM and other detection methods,the morphology and phase of doped Mo po…
A red organic light emitting device with host 9,10-di-(2-naphthyl)anthracene (ADN)and red dopant 4-(dicyanomethylene)-2-t-butyl-6(1,1,7,7-tetramethyljulolidyl-9enyl)-4H-pyran(DCJTB)and assist blue dopant 2,5,8,11-tetra-tertbutylperylene(TBPe) was fabricated,and 4,4′,4″-tris[2-naphthyl(phenyl)amino]triphenylamine(2TNAT…
The method of phase conversion was used to emulsify the oxidized polyethylene wax to prepare oxidized polyethylene wax emulsion for leather finishing.And the main factors which can effect the properties of wax emulsion mainly were studied including sorts of emulsifiers,the amount of emulsifiers,the emulsifying tempera…
PA612/thermoplastic polyurethane elastomer (TPU) blends were prepared by melt extrusion.Interaction between theses two polymers was investigated by wide-angle X-ray diffraction (WAXD) and Fourier-transform infrared (FTIR) spectrometry.WAXD results show that the presence of TPU hinders the crystallization of PA612,lead…
By adding a little metal element Al into Cu45Zr45.5Ti9.5,BMG is successfully prepared with copper mold casting method.Differential scanning calorimetry(DSC) and X-ray diffraction(XRD) are employed to investigate the crystallization kinetics of Cu45Zr39.5Ti9.5Al under nonisothermal conditions.The effective activation e…