Materials Literature
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A teaching comparison experiment with male and female undergraduate students aged from 19 to 22 is carried out in more than 40 dynamic and static traction movements at a rate of 3 times per week and 80 min.each time for a period of 4 months each round.With the Heath-Carter method of evaluation for body forms,the shape…
Numerical simulation based on phase field method is developed to describe polycrystalline solidification for pure material.The evolution of interface morphology is studied and the effect of flow velocity and anisotropy parameters on the growth morphology of polycrystalline is also investigated for Ni-Cu alloy system.…
In_2(MoO_4)_3 is characterized by interesting negative thermal expansion behaviour,which is widely used in battery electrodes,light sensor,and laser devices.In this study,in - situ Raman spectrum of In_2(MoO_4)_3 was measured in a diamond anvil cell(DAC)up to 18 GPa.New Raman peaks appeared at1.2 GPa,which indicated a…
Three kinds of potassium titanates,namely K4Ti3O8,K2Ti2O5·0.5H2O and KTiO2(OH) were synthesized through a new method of KOH sub-molten salts in this paper.Based on the experimental results,a formation diagram had been constructed for the products synthesized in the TiO2-KOH-H2O system under atmospheric pressure with K…
By employing termogravimetry-differential scanning calorimetry(TG-DSC)method,in the air,the thermal decomposition processes of CeCl3·nH2O crystals which were attained in hydrochloric acid-cerium chloride hydrate saturated solution of different acidity had been analyzed.The result of thermal analysis indicated that aci…
Poly(perfluoroalkylated acrylate-acrylic acid)(P(PFAA-AA)) copolymer was prepared by the emulsion copolymerization of perfluoroalkylated acrylate and acrylic acid with quite different solubility behaviors.The structure and properties of the copolymers were characterized by infrared spectrometer(IR),differential scanni…
X-ray diffraction analysis and electron probe microanalysis were carried out to comparatively investigate the influence of pre-oxidation on the thermal corrosion behavior of Fe-20%Cr(mass fraction)alloy with KCI deposit at 750 ℃,where the salt deposit was prepared on the surfaces of as-prepared and pre-oxidized Fe-Cr…
In order to combine iron-based good toughness and high hardness,high wear resistance,high corrosion resistance of ceramics to produce the cladding laye with better performance,the experimental adjusted alloy powder systems,joining the alloy powder of ferro-titanium,ferro-boron,ferro-silicon,high carbon ferro-chrome on…
The wear mechanism of hoister journal bearing for coal mine was discussed by using oil analysis and ferrographic technique.The origin,structure and appearance characteristics of the babbitt friction polymer were analyzed.The choose of lubricating mode and lubricating oil of hoister journal bearing was discussed.The ma…
Phase change materials(PCMs) in textiles is a new type of intellectual and insulation materials.This article introduces the thermal regulating mechanism and application situation of PCMs in textiles,points out some significant problems need to be solved to develop phase change textiles for human needs.
Pb(Zn1/3Nb2/3)0.20(Zr0.52Ti0.48)0.80O3+xMnO2 piezoelectric ceramics were prepared using columbite precursor.The effects of crystallographic phase and electromechanical properties on the addition of MnO2 were investigated.The results showed that the pure perovskite structure nearly by the morphotropic phase boundary(MP…
GdPO4 ∶Eu3 + and GdPO4 ∶Ce3 + ,Tb3 + nanocrystals were synthesized via the polyol method firstly and characterized by X-ray diffraction (XRD), FTIR spectrum, transmission electron microscopy (TEM), photoluminescence (PL) and thermal gravimetric-differential scanning calorimetry (TG-DSC). The obtained nanocrystals were…
The thermal stabilization of PI/Al2O3 hybrid films was studied by TG.The results showthat the thermal stabilization of PI with 8% mass fraction Al2O3 is better than that of PI with 4%mass fraction Al2O3.The kinetic parameters of thermal decomposition(thermal degradation activation energy,collision coefficient and reac…
The electronic absorption spectra of complex [Zn(mnt)(5-NO2-phen)] in DMSO and DMF,and the emission spectra in DMSO(mnt=mnt2-∶1,2-dicyano-1,2-ethylene-dithiolate.5-NO2-phen :5-nitri-1,10-phenanthroline) were measured.The absorption bands at 270～280 nm,320~350 nm and 360~390 nm are the intraligand πb→π* transfer of lig…
The effect of Cd alloying element on corrision property of magnesium alloys is analyzed. The experimental results show that the matrix microstructure is remarkably refined by adding small amount of Cd to pure magnesium,and the corrosion resistance is improved also.However,with increase of Cd content,the corrision pote…
Large amounts of gas phase chromium compounds are formed in the chromium involved waste incineration processes,including the high-valence chromium compounds which are extremely toxic,and the low-valence ones which are barely non toxic.Studies in depth on the reaction mechanism in that processes are badly needed.The th…
The SHPB compression and the reversed Taylor tests were accomplished for JOB-9003 to explore its dynamic properties under impact load and to provide the experiment data for its constitutive model.The stress-strain curves of JOB-9003 obtained in the SHPB experiment were analyzed.The analysis shows that there is a good…
Metal matrix composites exhibits a high specific stiffness and strength,lower wear rate,and good mechanical proprieties at the elevated temperature.Furthermore,it can be designed and fabricated according to the aim of applications.In this paper the chemical method and mechanical method were used to treat the interface…
This paper introduces the development and characters of six-weft satin drill of fine tex and high density with bundle-filling technology and its key processes weaving on air-jet loom discussed.Producing multiple-weft fabric with such technology can increase weft number to be inserted into the shed every time,which eff…
Electroluminescent devices based on Ytterbium complexes were fabricated by using vacuum deposition.The device has the structure of ITO/m-MTDATA/TPD/TPD:Yb(DBM)3Pyphen/Yb(DBM)3Pyphen/BCP/LiF/Al.N,N'-diphenyl-N,N'-bis(3-methylpheny-l)-(1,1')-biphenyl-4,4'-diamine(TPD),Yb(DBM)3Pyphen and 2,9-dimethyl-4,7-diphenyl-1,10-ph…