Materials Literature
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The influence on the performance of nitramine modified double base propellant with KE(a nitrite) and K2SO4 as eliminated-flame additive was investigated.By using burning rate test,differential scanning calorimetry(DSC),rocket engine test and an infrared thermal imaging device,the influence mechanism was discussed.Resu…
The effects of Hf content on the microstructure,dendrite microsegregation and precipitated phase of FGH96 superalloy powders were investigated by scanning electron microscopy,transmission electron microscopy with energy-dispersive spectrometry,and carbon extraction method. It is found that Hf content can change the pr…
Hybrid carbon membranes are first prepared using BPDA-ODA type polyimide and zeolites as precursors and additives,respectively.The thermal stability of the precursor was measured by thermogravimetric analysis.The microstructure,morphology and gas separation performance of resultant carbon membranes were characterized…
Periplocae Cortex is one kind of traditional Chinese medicines which can be used to treat rheumatoid arthritis.With the continuous research,the novel pharmacological activities of Periplocae Cortex,such as antitumor activity and cardiotonic effect,have been discovered gradually.It has a wide development prospect.The a…
Biochar is a key by-product of chemical processes with a huge potential for application in environmental and soil science studies.In recent years,biochar has received considerable attention as soil conditioner,fertilizer carrier and carbon sequestration agent.However,the role of biochar in improving the fertility of d…
Copper coatings with different preferred orientations were prepared by direct current electrodeposition using stainless steel 304 as substrate from a bath containing CuSO4·5H2O 250 g/L and 98% H2SO4 100 g/L at 30 ℃ and current density 1 A/dm2 or 15 A/dm2 . The surface morphology and microstructure of the copper coatin…
The assessment of pleated fabric mostly depends on experts' subjective appraisement and the results are uncertain. A method to evaluate fabric pleat grade was proposed based on photometric stereo algorithm. Two-dimensional gray-scale images of fabric were captured under the illuminations from 8 different directions, a…
The faults occurring in the input ports and crossbar of the router will seriously affect the performance of the entire network in Three-dimensional Network-on-Chip.This article proposes a fault and congestion-aware fault-tolerant router.By adding a redundancy of the input port and the bypass bus,our scheme can achieve…
There have been significant applications in energy transformation and smart sensor.In this paper several preparation methods of the giant magnetostrictive TbDyFe alloy are described and each preparation method has its own microstructure and performance.And the advantages and disadvantages in preparation and the resear…
The reaction characteristics of fuel-lean CH4 catalytic partial oxidation over Rh are investigated numerically in a micro-channel,by using detailed elementary mechanism,focusing on the effects of inlet temperature,equivalence ratio of CH4/O2 and added H2O on catalytic partial oxidation of CH4.The results show that ove…
In order to measure flying velocities of controlled tungsten alloy fragments under detonation driven,comb targets method was used to study the initial velocities.Schematic of comb targets and typical signal of comb targets were discussed.The experimental results of flying law and long distance flying time of tungsten…
Accelerated corroding experiments of ordinary concrete and modified concrete(fly ash concrete,polypropylene fibre concrete and concrete mixed with fly ash and polypropylene fibre) immersed in two group of high concentrated mixed corrosive solutions were carried out.The two mixed corrosive solutions consist of SO2-4,Cl…
Numerical simulation is an effective tool for improving the large diameter single silicon crystal quality and reducing the preparation cost.The deflection of melt/crystal interface in Czochralski(Cz) method is a key issue for crystal quality.Owing to the high-temperature environment and in-situ observation are quite d…
The interactions between 2,17-bis(sodiumsulphonato)-5,10,15-tris(pentafluorophenyl)-corrole(1) and its gallium complex(1-Ga) with calf thymus DNA(ct-DNA) had been studied by UV-Vis absorption spectroscopy,fluorescence spectroscopy,circular dichroism spectroscopy and viscosity experiments.Results revealed that 1 and 1-…
Isothermal adsorption,thermodynamics and kinetics of the adsorption of Cu(Ⅱ) on a crosslinked chitosan resin were studied through the static adsorption experiments.Results show that the isothermal adsorption follows the Langmuir equation and the adsorption is a spontaneous endothermic process within the concentration…
The density functional theory is used to study the adsorption mechanism of volatile organic compounds(VOCs)on MOF-5,including methanol,acetaldehyde and acetone.The results show that these VOC molecules are adsorbed in four adsorption sites of MOF-5 and Zn4O clusters are the most favorable adsorption sites.Comparison a…
Zn-6%Al alloy and Zn-6%Al-3%Mg alloy coating was galvanized by hot-dip method in different immersion time to get intermetallics layer with different thickness.Samples were characterized by Scanning Electron Microscopy(SEM) and Energy Dispersive Spectroscopy(EDS) to investigate the interfacial reaction and phase compos…
The carbonation pellets-BOF process,which combines iron-bearing dust utilization with carbon dioxide recycling,is a green process of iron-bearing dust recycling.The influencing law of process parameters,such as different CaO proportioning ratio,reaction temperature,CO2 partial pressure,on the carbonation reaction conv…
The heavy metal Cd2+ are common in sediment,with chronic toxicity to benthic diatoms.The influence of Cd2+ on the growth,protein content and extracellular polymeric substances(EPS) of the benthic diatom Cylindrotheca closterium from mangrove was studied in the present paper.Compared to the control group,the growth,pro…
Green-emitting vanadate phosphor Ca5Mg4(VO4)6 was synthesized via a solid-state reaction route.The phase composition,morphology and photoluminescence properties of the synthesized phosphors were characterized by X-ray diffraction,scanning electron microscopy,energy-dispersive X-ray spectroscopy,Raman spectroscopy,and…