Materials Literature
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The mixed sand was produced by mixing the manufactured sand with unqualified grading and the river sand according to the certain proportion.Then the influence of mixed sand with different ratio of river sand to manufactured sand on chloride diffusion coefficient and sulfate corrosion resistance coefficient for hardene…
The uncoated tool and CVD coated tool were employed in high-speed turning of free-cutting steel AISI 12L14.Both tool life and wear mechanism were investigated.Results show that:CVD coated tool surfaces appear manganese sulfide(MnS)lubrication zone while the uncoated tool does not,the rake face of CVD coated tool suffe…
A paper published in 1952 described a previously unknown phenomenon of the formation of carbon tubes ~0.03–0.50 µm in diameter in carbon monoxide decomposition on dispersed iron particles at 873 K [1]. At that time, this paper almost completely eluded the attention of scientists. The interest in this phe� nomenon abru…
Hot washing on power transmission line devices was a convenient and effective way with high economic benefits for avoiding power grid pollution flashover.Because of no professional high-altitude hot washing device and big hidden danger in this work,a visual security control system was designed,which refers to distance…
The α-methyl styrene and acrylonitrile copolymer nanospheres(MStAN) were prepared by emulsion polymerization of α-methyl styrene(α-MSt) and acrylonitrile(AN),and using divinyl benzene(DVB) as crosslinking agent.The properties of the MStAN nanospheres were then investigated.The dispersion of MStAN nanospheres in EPM wa…
This paper prepares Ag nanoparticles with water as the solvent and reduction of AgNO3 by tea polyphenols(TP) and uses Fourier transformation infrared spectrum(FTIR),UV-Vis spectroscopy(UV-Vis),transmission electron microscope(TEM) to study the reducibility of TP and feature of Ag nanoparticles.In order to prepare Ag n…
The development and trend of iridium/rhenium material system for small thruster were summarized.With the request of improving the performance of small thruster,to develop and apply new lighter iridium/rhenium material system which has better high temperature performance is an effective way to improve the properties of…
The separating process of launching carrier rockets on an airplane is studied.The whole solution which can solve the internal air launching separation issue is put forward,mainly based on CAD solid modelinmg method,multi-body dynamics and CFD dynamic mesh method combined with 6-DOF function.A key issue in separating s…
A two-step anodic oxidation process is used to prepare AAO template with equally distributed holes,basically the same aperture and hexagonal orifice.Meanwhile,by removing the barrier layer without peeling the film,the residual aluminum becomes basement and functions as electrode.In the non-aqueous system,the electroch…
The conception,characters,species and the sensing mechanism of fluorescent conjugated polymers are summarized.Research applications of fluorescent conjugated polymers as sensors in recent years are reviewed.
Hydrogen induced internal fatigue crack initiation and propagation in steel was studied by numerical simulation.First,finite element analysis(FEM) was used to analyze the process of hydrogen difusion and accumulation at a defect in steel under fatigue load,and then the concentration of hydrogen was computed.According…
Graphene is the unique two-dimensional(2D) free state atomic crystal.It's a basic structural unit of building 0D fullerenes,1D carbon nanotubes,3D graphite and sp2 hybrid carbon.The graphene which has unique structure and excellent properties has attracted the attentions of different fields scientists and have a good…
PVP/Ti(/SO4)2composite fibers were fabricated by electrospinning. Firstly, crystalline TiO2nanofibers were fabricated by calcinations of the as-prepared composite nanofibers at 700℃ for 10h. XRD analysis showed that after the 700℃ calcination obtain the mainly in rutile mixed crystals TiO2. SEM analysis indicated that…
A high solid-containing waterborne polyurethane emulsion was prepared using isophrone diisocyanate(IPDI),polyester polyol and 2,2-dimethylol butyric acid(DMBA)as materials by self-emulsification method.The effects of emulsification temperature,small molecular diol and chain extender on emulsion viscosity,particle size…
In this paper, the alkyl polyglucoside was synthesized with glucose and decyl alcohol under catalyst. The factors affecting the glycosidation and its yields such as glucose particle size, reaction temperature, catalyst dosage and ratio of alcohol to glucose were studied. The raw materials should be pre-treated by imit…
Zn(acac) 2 and Al(acac) 3 were used as sources of zinc and aluminum,and ethanol and water acted as solvent.The ZnO∶Al thin films were deposited on glass substrates by ultrasonic spray pyrolysis.The effect of aluminum doping level(0%-20%)on optical and electrical properties of ZnO∶Al thin films were studied.The ZnO∶ Al…
It is shown that ST(m;nm) is odd graceful by defining the vertex sign matrix,which verifies that the conjecture proposed by Gnanajothi is correct on ST(m;nm).With the decomposition of graph and edge sign matrix,ST(m;nm) is proved to be super edge-graceful when its order is odd,which implies that the conjecture propose…
Using zinc nitrate and sodium hydroxide as raw materials,ZnO nanopowders were successfully prepared by microwave-hydrothermal method.The product prepared by the microwave-hydrothermal method was characterized by X-ray diffraction(XRD),scanning electron microscope(SEM),laser particle size analysis and specific surface…
The stainless steel nipple fracture in a benzene hydrogenation pipe system was analyzed by means of metallographic microscopy and scanning electron microscopy.The results show that the main reason of the fracture was the severe nitride inclusion in the steel.With the aggregation or chain distribution of such inclusion…
Using cytochemical technique,we observed the distribution of polysaccharides and lipids during the anther development of Michelia figo:(1)A few lipids were accumulated in sporogenous cells.At microspore mother cell(MMC)stage,a few lipids were still located in the MMCs which had formed a callose wall.At the same time,a…