Materials Literature
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To extremely improve short-term overload capability and high power density of the motors for electric vehicles,the losses and transient temperature rise were thoroughly simulated with finite element method considering the electro-magnetic,thermal and control strategy.Losses analysis indicated that the maximum iron los…
We obtained preferentially (220)-oriented yttria-stabilized zirconia (YSZ) buffer layers on glass substrates by pulsed laser deposition. These preferentially (220)-oriented YSZ buffer layers enabled us to grow preferentially (100)-oriented Sr Ru O 3 bottom electrodes. On the preferentially (100)-oriented Sr Ru O 3 bot…
This article reports on the synthesis of TiO2 nanotubes (NTs) with tunable morphologies by adjusting the reaction conditions during anodization to balance electrochemical reaction and chemical etching. Nanoporous and free-standing NTs with different lengths and diameters are thus obtained in a controlled manner, solvi…
Over the years,XLPE cable has been employed in a broad range of applications in electrical transmission and distribution lines.The reliability of power system is considered as one remarkably depending upon the safe use of such cables.It is pointed out that periodic test such as voltage withstand test can't match the i…
Asphalt pavement has become the mainstream of the tunnel construction.However,the asphalt is inflammable,and serious tunnel fire accidents have occurred in many countries around the world.The commonly-used effective flame retardants are selected to composite the Halogen-Antimony-Boron flame retardant system.The flame-…
Fuels based on petroleum will eventually run out in the near future. DME (Di-methyl Ether) is a clean energy source that can be manufactured from various raw materials such as natural gas, coal as well as biomass. As DME has no carbon-carbon bond in its molecular structure and is an oxygenate fuel, its combustion esse…
Two CuInS2 semiconductor samples synthesized from chemical elements with the equiatomic cation ratio (N Cu/N In = 1) and either an excess or stoichiometric sulfur content have been investigated by 63Cu and 115In nuclear magnetic resonance. The spectra were recorded on a Bruker Avance-400 spectrometer at a temperature…
This paper analyzes the radial response of a target due to the penetration of the shaped charge jets. The radius variation of the jet in the motion process is deduced based on the virtual origin concept. The variation of the cavity radius in the penetrating process is analyzed,and a theoretical model to describe the r…
Based on the mechanical properties tests of HRB500 grade steel bars,the influence of different high temperatures and the variation of stress-strain curves after high temperature are investigated.The mechanical model is obtained.The results of experiments indicate that: mechanical properties of bars cooled down after d…
Glue immersion is an important process that influences the properties of reconstituted bamboo lumbers.The authors selected dendrocalamopsis oldhami,a kind of bamboo,and investigated the effects of three glue immersion parameters including glue solids content,immersion pressure,and immersion time on the bamboo composit…
For improving fuel efficiency and reducing exhaust emission, it is necessary to enhance the demands for materials selection and machining of the engine piston and cylinder liner. In the present paper, the research actualities and problems focused on materials and machining technologies of motors engine piston, piston…
By using the calculation model of circulating current in the sheaths of single-core XLPE cables,a C++ program is coded,and the circulating current in a grounding unit,in which sheaths of cables are connected via cross-bonding,is calculated for three-cable connection with different arrangements and lengths.And the calc…
Based on thermo-simulation experimental results,dynamic recrystallization models of 42CrMo steel were derived.Effects of deformation temperatures on the formation and dynamic recrystallization of 42CrMo steel were simulated by finite element method.The results show that the deformation of specimen is inhomogeneous,and…
This paper introduces the latest international research progress of CFD application in nuclear reactor system analysis.CFD method has been applied to a few 3-D single phase transient simulations,including flow field modeling of the reactor cores,assemblies,and vessel plenums.On the other hand,CFD method applied to rea…
The polishing technology of diamond films has become one of the key technologies for the popularization and application of diamond films.In recent years,a number of alternative polishing techniques of diamond films have been reported,and each having technological advantages and disadvantages.The thermochemical polishi…
The glass fibers(GF) were treated by different silane coupling agents,the effects of content and size of GF on mechanical properties and tribology properties of TPI composites were investigated.The worn surfaces were analyzed by SEM.The results indicate that mechanical properties and tribology properties of TPI compos…
HTV silicone rubber has been widely used as the outer insulation material of composite insulators because of its outstanding hydrophobicity,hydrophobicity recovery properties,good electrical insulation and excellent weatherbility.Accordingly,the influence of corona intensity on the trap characteristics of HTV silicone…
Using transmission caustics system,the crack propagation experiment of media containing prefabricated flaws under explosive stress wave is carried out.The varieties of dynamic stress intensity factor,crack extensions rate,crack extensions acceleration,and dynamic energy release rate in the crack tip of media containin…
As a novel internal insulating material,the application of silicone rubber(SIR)in power cable accessories becomes more and more widely in recent years.However,few studies were focused on the influence of defects on the electrical tree characteristics and the damage mechanism of such insulation is still unknown.Two kin…
Utilizing the regular conditions in laboratory,organic montmorillionite(OMMT) was prepared from dodecyl trimethyl ammonium bromide(DTAB),tetradecyl trimethyl ammonium bromide(TTAB),cetyl trimethyl ammonium bromide(CTAB) and montmorillionite(MMT).Results from X-ray diffraction(XRD) showed that layers of OMMT were inter…