Materials Literature
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The Ni-20Cr alloy was smelted by air induction furnace.The nitrogen and oxygen content in Ni-20Cr alloy was investigated at different Cr pretreatment temperature and intermediate alloy processing parameters.The nitrogen absorption behavior and mechanism was analyzed by STA device.The results show that Cr metal tends t…
In order to study the heat transfer performance of knitting wool fibers fabrics,the relationship between coefficient of thermal conductivity and other factors such as opening percentage,thickness,dry weight per unit area and fabric density are analyzed.The results show that the coefficient of thermal conductivity decr…
The synthesis methods and process of the polyacrylonitrile directly affect the properties of the PAN-based carbon fibers.Using the dynamic and static laser scattering methods,the weight-average molecular mass,hydrodynamics diameter and particle-size distribution of the prepared polyacrylonitrile with the different amo…
Boron-doped(2,2) single-walled carbon nanotubes(SWCNT) was studied by using the first-principle method based on density functional theory.The geometry structure,formation energy,band structure and density of states(DFT) were calculated.The results show that the diameter of SWCNT is increased when boron is adulterated.…
CH4 reforming of CO2 catalyzed by Ni/Al2O3 and Ni/MgO-Al2O3 is carried out on a simulated solar energy condenser reactor by Xenon lamp,the catalysts are prepared by plasma reduction method,both catalytic performance and energy conversion efficiency are investigated,the result shows that Ni/MgO-Al2O3 has higher catalyt…
In order to study the molecular structure changes of polystyrene in natural dry-hot environment,outdoor exposure test was performed in Turpan and Ruoqiang for one year,and FTIR,GPC,and DSC analysis were performed thereafter.It showed that photo-degradation and chain scission occurred,resulting in the decreasing of mol…
Capillary rheometry magnesium hydroxide(silane processing) the rheology of flame retardant EVA was studied.The effect of shear rate,shear stress and temperature on the apparent viscosity of EVA was discussed.The changes permanent of the flow activation energy sticky was studied.The experimental results show that in th…
The tensile properties of martensitic and annealed Zr-Nb alloy nuclear fuel cladding tubes were studied by means of static ring tensile test at room temperature and 400℃.The tensile fractures were analysed by using SEM.The results show that martensitic Zr-Nb alloys have higher strength and better toughness than anneal…
The rheological development history and research status were reviewed and the research methods of polymer rheology were expounded from the theoretical simulation and experimental rheology, respectively.The importance of processing rheology for polymer processing was overviewed.The main emphases were placed on the micr…
Based on the consistency of dynamic response,an equivalence method is proposed in which the explosive load acting on a concrete slab is simplified to be uniform triangle pressure load without ascending time.By using dimensional analysis,the maximum momentum of the structure and its arrival time are used as medium para…
In order to analyze the forcible entry effect of dynamic entrance tool on burglary resistant safe door by water pressure blasting,the finite element models of dynamic entrance tools based on coupling blasting and water pressure blasting were built by the ANSYS / LS-DYNA. The air pressure and the steel deformation in t…
A method based on the characteristics of Methanol to Light Olefins(MTO) is proposed to improve the traditional depropanizer before cryogenic-separation process.This paper solved the problem of the high energy consumption for demethanizer and large amount of ethylene loss by adding a scrubbing tower before the demethan…
Waste frying oil was a promising class of carbon feedstock for PHB production,due to the high carbon content and low price.In this study,PHB content and production was optimized with five different C/N ratios.The highest PHB content was obtained,with approximately 78.2%,when the ratio was 15:2.The PHB content and conc…
Montmorillonite was modified with non-ionic surfactant Trion X-100 and anionic surfactants sodium stearate,sodium dodecyl benzene sulfonate and sodium dodecyl sulfonate respectively.The preparation of anion-non-ionic surfactants modified montmorillonites,the effects of anionic surfactant types and montmorillonite type…
In Simulated Concrete Pore Solution,The effect of the novel Inhibitor on the corrosion behavior under chloride salt of some reinforcing steel was studied by means of polarization curve,electrochemical impedance spectroscopy(EIS).The results indicate that this novel inhibitor has efficiency on the corrosion inhibiting…
In this paper,W/Mo bimetal composite was prepared by powder metallurgy with different vacuum sintering process,and the microstructure,density,hardness and combination state of the resulted composite were tested.The results showed that,the W/Mo bimetal composites satisfying some certain requirements could be realized b…
Ni47Ti44Nb9 shape memory alloy was studied by high temperature tensile experiments at 25-450 ℃ along the rolling and the transverse directions,respectively.The experimental results show that: the stress-plateau in the stress-strain curve appears along the rolling direction at 25 ℃.While,along the transverse direction,…
The influences of inorganic additive,organic additive,compound additive on the formation of the precipitated calcium carbonate superfine particle were introduced.It was pointed out that due to the influences and interaction of various reaction conditions,additives and carbonation model,the fine calcium carbonate parti…
By using TEOS and ZrOCl2·8H2O as precursor and ethanol as solvent,SiO2/ZrO2 inorga-nic composite membranes on the substrate of Al2O3 system were prepared by sol-gel method. The study focused on the effect of the zirconium content,immersion time and coating method on the per-formance of membranes. The experimental resu…
Three dimensional visco elastic large deformation incremental constitutive equation was derived based on Total Lagrangian method,and the equivalent stress distribution during launching was simulated by finite element method under high load condition for projectile based equipment. The influences of mechanical performa…