Materials Literature
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Aiming at the shortage of intermission of wood solar drying,a paraffin latent heat storage system with fork row tubes was added to an original solar drying equipment and the wood solar drying process was simulated on a small test stand.Preliminary study showed that: the wood drying rate was largest affected by air sup…
Phosphine is the potential antioxidant for jet fuel and can improve the stability of jet fuel at high temperature.The experimental results indicate in the presence of free radical inhibitor,the oxidation(120 ℃) of phosphine operation between phosphine and oxygen directly.Thermal dynamic data indicate the reaction occu…
A novel thio-containing polyurethane as macrophotoinitiator(PUS-HSM) was synthesized through step polymerization of 3,5-diamino-4′-thiophenylbenzophenone(DATBP),hexamethylene-1,6-diissocyanate(HDI) and N-methyldiethanolamine(MDEA).The benzophenone and coinitiator amine structures were successfully introduced into the…
[Objective] Aimed to study the nature,characteristics and ultrastructure of fibers of Ovis aries and several kinds of special animals.[Method] Wool,cashmere,alpaca,bactrian camel hairs,rabbit hair,mohair and yak hair were used as the experimental materials,and scanning electron microscopy was used to observe their sca…
Through building Polypropylene PP spunbonded polymer air drawing maths model,influence of spunbonded technic parameter to fiber diameter are discussed and different technics parameter are experiment.It is found that the less of extruding polymer,the more of polymer temperature,the more of air original temperature,the…
Optimized parameters of eletroless deposition of Ni-W-P alloy on NdFeB magnets were determined by orthogonal experiment,the optimal formula of electroless Ni-W-P plating bath was obtained as follows: 30 g/L of nickel sulfate,20 g/L of sodium tungstate,40 g/L of sodium hypophosphite,30 g/L of complexant,30 g/L of buffe…
Analysis ofαphase solution kinetics and solution microstructure characteristics were carried out by dilatometry and microscopic test.The results indicate that rapid heating treatment increases transformation temperature and velocity ofαphase solution.Evolution ofαphase during solution treatment includes solution,spher…
Nonlinear refractive index(n2),Absorption coefficient(β) are material figures of merit for ultrafast all-optical switch.n2 and β of GeS2-Ga2S3-Sb2S3-AgCl glass were measured by using Z-scan technique.The result shows GeS2-Ga2S3-Sb2S3-AgCl glass is characteristic with high value n2(1.581×10-10esu),little β at 800 nm(β=…
Objective To give a basic understanding of the influence of different matrix sintering temperature to the mechanical properties of alumina-zirconia nano-composite infiltrated ceramic.Methods To process the alumina-zirconia nano-composite infiltrated ceramic by 1 250,1 300 and 1 350 matrix sintering temperature.The con…
Zinc sulphide spheres-like nanoparticles had been synthesized via the hydrothermal route under the different conditions.The particles were characterized by X-ray Diffraction(XRD),transmission electron microscopy(TEM),and UV-VIS measured was used to study the sample's optical properties.Band gap of ZnS was calculated b…
The angular velocity,displacements in X and Y direction of guide rolls were calculated by mathematical software MATLAB,then the data were imported to ABAQUS finite element analysis software,and the ring rolling process for a large ring with φ4.6 m was analyzed.The results show that the radial-axial rolling for the lar…
One new macrocyclic triamine derivative ligand 1,4,7-triazacyclodecane-N,N′N″-triacetate and its four transition metal complexes, [ML]·1/2[M(H2O)6]·[ClO4]·nH2O (M=Co2+, Ni2+, Cu2+, Zn2+) have been synthesized and characterized by physico-chemical and spectroscopic methods. The crystal structure of [NiL]·1/2[Ni(H2O)6]·…
Combined with several troubles of cracking in rolling stock bogie frames in recent years,according to the standard of International Institute of Welding,with use of the finite element calculation result,the fatigue damage evaluation is made for the type of typical welding joints at key parts of bogie frames for a cert…
Effects of the content of micron grade ZrC particles on the microstructure and mechanical properties of a low-carbon microalloy steel were investigated.The mechanical properties of the test steels were determined by tensile test,impact test and hardness test.The microstructures of the test steels were observed by meta…
Based on the stable Ivey non-cyanide Au-Sn alloy plating solution at room temperature,a new stable non-cyanide Au-Sn alloy plating solution at high temperatures was developed which could kept stable at 50 ℃ for 5 h without decomposition,using EDTA which was instead of ammonium citrate as gold ion complexing agent,pota…
The melt of Al-20%Si alloy was modified after remelting by P,and then mixed with pure zinc melt to fabricate in-situ silicon particles reinforced zinc matrix composites.The microstructure and mechanical properties of the composites were studied.The results indicate that the size and distribution of silicon particles i…
In connection with the production of suede fabric,alkali deweighting treatment processes for two different superfine fiber fabrics were studied by means of orthogonal experiment design,and the effects of alkali concentration, processing temperature and time on peeling were discussed.The results indicated that the opti…
Rollers of the full ball bearing which only being used for 5 days failed with surface exfoliation and flaking.By adopting macro examination,metallographic examination,chemical compositions analysis and hardness test the failure reason was analyzed.The result indicate that not sufficient tempering,steep carburized laye…
The process about mechanical energy of plastic deformation tranforms into heat has been investigated, as it is carried at low strain rate(0.00067s~(-1)) when static stretching.Based on the analysis of energy distribution at static stretching,a heat transfer model is established and solved by using the explicit finite…
Carbon Nanotubes(CNTs)/CdS core-shell nanowires were prepared through a room-temperature chemical reduction method by using bamboo-shaped CNTs as template.The morphology and the phases of the resultants were characterized with transmittance electron microscope(TEM) and X ray diffraction(XRD) techniques,respectively.It…