Materials Literature
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Adsorption removal of basic nitrogen compounds in the shale diesel with USY molecular sieves was investigated.The effect of adsorption time,temperature and adsorbent/oil weight ratio on the nitrogen removal rate was studied,and found that highest nitrogen removal rate(30.73%) are obtained under the following condition…
Internal thread formation by cold extrusion based on low-frequency vibration can realize vibration extrusion by extruding tap.It can turn the process of dry friction into a more favorable state of boundary friction.Therefore it can overcome the defect of traditional cold extrusion that the coolant cannot easily enter…
The structure of a new divertor cooling module is introduced for EAST superconducting tokamak.By using the FLUENT finite elemente software,the steady state thermal analysis was performed for the model with different parameters so as to quantifictional study the change rule the heat exchanged capacity with its paramete…
On account of difficulty in finding magnetizing inductance when the transformer is no load and secondary-side voltage and current data are unknown, a method is put forward to solve magnetizing inductance of transformer based on hysteresis loop of dispersed data point. The concrete step is as follows. Firstly, accordin…
Magnesium alloy AZ31B and Cu dissimilar metals were bonded by the transient liquid-phase diffusion bonding(TLP) process.The microstructures and properties of AZ31B/Cu TLP bonded joint were researched by SEM, micro-hardness test and XRD.The results show that under the condition of 500 ℃,40 min and 2.5 MPa,the diffusion…
Pollution layer on insulator surface may change under surface discharge activities during the long-term running of insulators,which influences the contamination characteristics of the insulators.In order to investigate these influences,on the basis of discharge simulation experiments on insulator surface,we studied th…
Fe-Cr-Si-B-C composite coatings were fabricated on 45 medium carbon steel substrate using electromagnetic control assisted laser cladding process.The microstructure,phase composition,friction and wear behaviors of the composite coatings were investigated by X-ray diffraction,scanning electron microscopy,energy dispers…
Based on the metal magnetic memory testing(MMMT),the relationship between the magnetic memory signals and the stress concentration degree for Q235steels static tensile test under different conditions are investigated.Then the magnetic domains at different points with various stresses on the sample are observed.The res…
The uniaxial compression experiments were conducted on 120specimens with the size of 70.7mm×70.7mm×228.0mm for hybrid fiber-reinforced reactive powder concrete(RPC)after being exposed to 20-900℃.The effects of fiber content and exposure temperature on the mechanical properties of RPC were investigated,including the un…
The Sb3 +,Bi3 +,Zr4 + and Si4 +doped YAG ∶Ce yellow phosphors were synthesized by high temperature solid-state method.The doping effect and the related mechanism of Sb3+,Bi3+,Zr4+ and Si4+ on the luminescence intensity of YAG ∶Ce were studied.The results show that the luminescence intensity firstly increases with the…
The environment of the indoor substation achieves the integrated control of the temperature,the humidity and the poisonous gas SF6 by combing the exhaust equipment with the air conditioning and refrigeration.Mathematical models of the temperature and the humidity are built according to the integrated factors of indoor…
High-resolution X-ray tomography technology was adopted to analyze inner structural features of multi-directional braided carbon / carbon composites.The tensile property and failure mechanism of this material at room temperature were also studied. Results show that the fiber tows of 4-D C / C composites have improved…
Tongling is one of the main non-ferrous metal mining areas in China, and the biodiversity in the river ecosystem of this area is seriously affected by heavy metals as a result of mining activities. In the winter in 2010, an investigation was conducted on the community structure of phytoplankton and its relationships w…
针对非制冷红外探测器系统，设计了一种无需衬底温度稳定器——热电制冷器(TEC)的读出电路(ROIC)结构.首先分析了衬底温度对微测辐射热计的特性的影响，利用ROIC对衬底温度变化引起的微测辐射热计的特性的变化进行补偿，实现ROIC的输出信号与衬底无关.该ROIC已在0.5 μm CMOS工艺下成功流片，并应用了到阵列大小为320×240的非制冷微测辐射热计焦平面上.测试结果表明: 在衬底温度变化20 K时，ROIC输出信号仅变化2 mV，实现了去除TEC后衬底温度补偿的功能，有效地降低了系统功耗.该ROIC在低功耗，小体积的非制冷红外探测器上有着广泛的应用.
In order to quantitatively understand impulsively loading mechanism of a point pyrotechnic separation device,the finite element models of three processes including explosion,strain energy release and impact were built,respectively.The three different physical processes and the induced responses were investigated,and t…
The phenolic resin carbon-coated microcrystalline graphite,as anode materials for lithium-ion battery,was prepared by being coated with phenolic resin carbon by immersion method,following with carbonization.The influences of the content of phenolic resin carbon on the structure and electrochemical performances of micr…
Metal hydrides(Mg(BH4)2 and MgH2) with high heat values are expected to improve the explosion properties of RDX.However,they bring safety problems at the same time.In order to explore the consistencies between RDX and these two kinds of metal hydrides,the DSC was used to study the thermal decomposition characteristics…
In order to investigate monitoring methods of sulfur corrosion in transformer,the copper content in oil and the sulfur-corrosion test results of 40 operating transformers were compared.Moreover,dynamic copper strip corrosion was tested by simulation in transformer oil samples filled with nitrogen,air and oxygen,respec…
A review was provided of the research progress of the inhibition mechanism of benzotriazole (BTA) as corrosion inhibitor for copper. The surface structure and composition as well as the corrosion inhibition type of protective films of BTA formed in acidic medium, nearly neutral medium and alkaline medium were highligh…
Catalytic reduction of NO by metallic iron mesh roll was experimentally studied in a horizontal ceramic tubular reactor.The NO reduction efficiency was tested in the temperature range of 300-1 100 ℃ in the atmospheres of CO,O2,CO2 and simulated flue gas respectively.The results show that metallic iron is very effectiv…