Materials Literature
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Base on the calculation software of 3D LS DYNA dynamics of finite element method,the model of shaped charge jet penetrating concrete target reinforced with steel fiber was established,and formation and penetration process of metal jet were studied by numerical simulation,and the comparison with X rays of jet formation…
A Cr-Ni alloy was prepared by powders metallurgy process(25 MPa cold isostatic pressing,1 200 ℃×20 min sintering)and then was heat treated(1 259 ℃×1 h+1 080 ℃×1 h,furnace cooling),and its friction and wear properties before and after heat treatment were studied.The results show that the heat treatment could increase t…
Uniform hierarchical flower-like β-Co(OH)2 anchored on conducting carbon nanotube(CNT) papers were successfully synthesized by hydrothermal method, which could be served as flexible electrode material for high-performance electrochemical capacitors. The structure, morphology and properties of the products were studied…
Early thermal gravimetric analysis showed that pyrolysis temperature of polyolefin is higher than biomass,and thermal behavior between biomass and plastic is independent.Influence of three additives-sepiolite,Al2O3 and Fe2(SO4) 3-on the yields and chemical compositions of co-pyrolysis liquids(bio-oil) from the pine sa…
The Ce-Fe-Zr-O(x)/Al2O3 supported oxygen carrier was prepared through co-precipitation.Selective oxidation of methane to syngas using lattice oxygen of oxygen carriers was investigated in a fixed micro-reactor system,and the oxygen carriers were characterized by means of XRD,BET and H2-TPR.The results show that there…
Taking glass fiber reinforced aluminum laminates as the object of the study.Based on stress analyses near an interface edge of dissimilar materials,establish the finite element model and define the displacement boundary conditions and load boundary conditions.Use FEM to simulate the thermal residual stress of differen…
High efficiency water reducer of poly-carboxylic acid as a new kind of building materials is in concentration of 20%-40%,which is unfavorable for storage and transportation,and limits its extensive application.The solid water reducer of poly-carboxylic acid was synthesized through bulk polymerization method without an…
Mg-9Al-3Zn-1Mn-6Ca-2Nd alloy was fabricated by spray deposition.The microstructure evolution and mechanical behavior of magnesium alloy were investigated by Gleeble-1500D thermal simulator under temperature of 330℃,strain rate of 1 s-1,pass interval of 5 s and 30 s.The results show that the Ca2Mg6Zn3 stable phases occ…
As one type of promising candidates for environmental and energy-related systems,multi-shelled transition metal oxide hollow structures(MS-TMOHSs) have drawn great scientific and technical interest in the past few years.This article highlights recent advances in one-pot solution synthesis of MSTMOHSs. We begin it with…
From the practice, the key equipment in horizontal continuous cooking system was improved in actual example way to solve present defect. Meanwhile, the cost and labor i ntensit y were reduced to raise economic profit through the improvement in structure.
Assessment criteria for preventing slip in hot rolling were proposed for the slip problem in aluminum strip rolling. An objective function with similar degree of residual power was chosen and a mathematical model for multiobjective optimization of rolling schedules was established,therewith,the reduction rate was opti…
H3PW12O40/ZrO2-WO3 was prepared by impregnation,and characterized by FT-IR and XRD.Cyclohexanone ethylene ketal was synthesized from cyclohexanone and ethylene glycol using H3PW12O40/ZrO2WO3 as the catalyst.The influence factors on the yield of cyclohexanone ethylene ketal were also investigated.The optimum conditions…
The amorphous forming ability of Pd-Cu-Si ternary system is associate with the lowest liquidus temperature.The principle and model of the phase diagram calculation is combined with low-dimensional to high-dimensional extrapolation formula to optimize the liquidus projection of Pd-Cu-Si ternary system.By the optimized…
The lattice structure and oxygen ion transportation mechanism of Si-based apatite and research progress in material pre-paration and property modification were reviewed,including the synthesis of nanopowder,utilization of advanced sintering techniques and enhancement of oxygen ion conductivity through doping.Some dire…
The dealcoholic,ketonic oxime and acetate RTV-2 fluorosilicone sealants were prepared by self-made hydroxyl-terminated fluorosilicone copolymer as the polymer matrix,ZnO as the filler,dibutyltin dilaurate as the catalyst,ethyl orthosilicate,trimethylbutylketoneoximesilane( D31) and triacetoxylmethylsilane( D17) as the…
This paper introduces 4 analysis methods used in the characterization of low-mercury catalysts for acetylene hydrochlorination,including BET surface area method,scanning electron microscope,thermal analysis,and atomic absorption spectrometry method.
The Fe5( PO4)4( OH)3·2H2O particles were synthesized bg one-step hydrothermal method using FeCl3·2H2O and NH4H2PO4·2H2O as starting materials. It was found that concentration of reaction system is an important factor affects the growth of spherical Fe5( PO4)4( OH)3·2H2O microcrystal. Otherwise, combined with the SEM a…
[Objective]To prepare silver nanoparticles by hydrothermal synthesis with chitosan as reducing agent and stabilizer. [Method]Using high temperature and pressure caused by hydrothermal synthesis method,the stable silver nanoparticles were prepared,the stability was investigated. [Result]The obtained nano silver sol has…
The polymerization of butadiene was carried out in cyclohexane with neodymium versatate(simplied as Nd)/n-butyllithium(simplied as Li)/diethylaluminum chloride(simplied as Al)catalyst.The effects of polymerization temperature,c(Li)/c(Nd) and c(Al)/c(Nd),and the type of alkylaluminum compound on the polymerization were…
ZnO-Bi2 O3-B2 O3 glasses with Y2 O3 addition for SOFC sealing were investigated.Structure and glass transition temperature(Tg) of the glasses prepared bymelting-quenchwere studied by Infrared spectroscopy,Raman spectroscopy and differential thermal analyzer;crystallization,thermal expansion coefficient(α) and volume r…