Materials Literature
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The initial oxidation of pure iron and implanted samples which were overlapped energy ion–implanted with C ions was studied by auger electron spectroscopy(AES).The velocity of adsorption and initial oxidation on the surface of pure iron is quicker than that of its C ion–implanted samples.The study indicates that the i…
(La0.8Nd0.2)2Mg(Ni0.9-xCo0.1Mnx)9(x=0,0.05,0.1,0.15) alloys were prepared by magnetic levitation melting under the protection of Ar atmosphere.The effects of both Mn substitution for Ni and the annealing treatment on the phase structure,hydrogen storage properties and electrochemical characteristics were studied syste…
In spent fuel reprocessing plant,the highly radioactive environment will have a certain radiation damage on monitoring equipments.Therefore,the using life of the equipments will be affected and the system reliability reduced.In this article,we use ORIGEN2 program to calculate the components of PWR fuel,and obtain a gr…
Ni and Cu nanopowders were synthesized by reducing basic carbonate in the hydrogen plasma environment.The purity,crystal structure,particle size and morphology of the prepared nanopowders were characterized with X-ray diffractometer(XRD) and field emission scanning electron microscopy(FESEM),and the reduction process…
Using the actual operation of 150 t converter in Anyang Iron Steel Group as an example,the burden and heat balance of converter are calculated based on the initial melting data acquired from site and the relevant data of thermodynamics.As a result,the computing model has been established so as to analyze the variation…
The NaxCoO2(x=0.5+δ,0.7) and Na0.5+δCo0.95Mn0.05O2 polycrystals are of γ-phase with highly preferential c-orientation,which were prepared by solid-state reaction;Mn-doping hinders the grain growth.The curves of resistivity vs temperature showed that NaxCoO2 present metallic behavior,the Na0.5+δCo0.95Mn0.05O2 present i…
It has important theoretical significance to investigate the stacking faults sub-structure in martensite of quenched steel.JEM-2100 high resolution transmission electron microscopy(HRTEM) was used to observe the martensitic in 35CrMo,2Cr13,and W6Mo5Cr4V2 steel.The results indicate that stacking faults sub-structure is…
The Fe3O4 nanoparticles were prepared by co-precipitation and modified by oleic acid and the composite chitosan magnetic microspheres containing Fe3O4 nanoparticles were prepared using the emulsification cross-linking technique by adding proper amount of glutaraldehyde into chitosan solution.The results demonstrated t…
In this paper,differential scanning calorimetry(DSC) was used to study the curing reaction kinetic of the diglycidyl ether of bisphenol A(DGEBA) with a methanol etherified amino resin(MEAR).The apparent activation energy derived from Kissinger and Ozawa methods is 35.67kJ/mol and 40.27kJ/mol,respectively.The reaction…
Two elements of carbon and chromium were implanted into the hard alloy surface by metal vapor vacuum arc(MEVVA) source with several different doses.The surface modification of the hard alloy was studied.The structure of sample surface was characterized and analyzed with X-ray diffraction,raman spectrum and metallurgic…
Ge2Sb2Te5(GST) alloy films on Si(100) substrate was prepared by a magnetron sputtering system at room temperature.The samples irradiated by femtosecond laser with different energy or annealed at 200℃ in an annealing furnace were studied by Raman spectra measurement,respectively.The dynamic transformation from amorphou…
Nano-Y2O3 was prepared by the precipitation method with polyvinyl alcohol as dispersant,and the nano-Y2O3 was modified by stearic acid.Surface morphology,microstructure and lipophilic performance of nano-Y2O3 and modified nano-Y2O3 were characterized by XRD,IR,TG-DTA and TEM.The results showed that the phase and grain…
The mixing technology and methods to improve dispersion effect of zinc oxide(ZnO) in integrated rubber(SIBR) were studied by characterizing the results observed with microscope,curing characteristics,tensile properties and dynamic-mechanical properties.The results showed that the mixing technology at high temperature…
Anorthite /mullite composites were prepared by the in-situ growth method using the main materials such as kaolin,aluminum hydroxide and calcium carbonate.Effects of the sintering temperature and anorthite/mullite mass ratio on the properties of the composites were studied.The results show that the highest flexural str…
Asymmetrical mass abrasion is one of the dominant reasons to cause a projectile bending,yawing and break when it strikes a concrete target normally at high velocity.The spherical cavity-expansion model is employed to construct the transverse load in the case of asymmetrical mass abrasion.With considering the axis drag…
Lipids existed in natural rubber latex were extracted by organic solvents(choroform/methanol mixes).The β-sitosterol was separated after saponifing the lipids.Also the influence of β-sitosterol on aging properties and thermal stability of rubber were measured and studied.The results show that β-sitosterol is a natural…
Heat treatment process tests were carried out for ZG35CrMnSi steel pin rail according to the characteristics of ZG35CrMnSi steel.Mechanical properties of the pin rail after heat treatment were tested and compared,and a proper heat treatment process was determined for improving the strength and toughness of pin rail.Th…
Potassium dihydrogen phosphate(KDP) crystal was rapidly grown by point-seed technique.Indentation experiments on different faces of KDP crystal were carried out at a serial of loads.The anisotropy of microhardness has been studied.The results showed that the microhardnesses of KDP crystal on(001),(101) and(100) faces…
2009年5-10月期间对呼兰河湿地8个样点进行了5次藻类植物采样调查, 经显微镜观察, 共鉴定藻类植物158个分类单位, 包括148种10变种, 隶属于7门8纲14目23科50属.呼兰河湿地藻类群落组成以硅藻、绿藻为主, 藻类植物的细胞密度变化范围在469.55×105-847.35×105 cells/L之间, 不同采样点藻类植物种类组成及丰度的变化趋势不同.采样点Ⅱ藻类植物种类最多;采样点Ⅰ、Ⅴ藻类植物丰度较大.呼兰河湿地内出现的藻类多为普生性种类, 但出现了一定的富营养化污染指示种类, 结合Shannon-Wiener多样性指数H'、Pielou均匀度指数J评价结果初步推断, 呼兰河湿地水域受到一定的污染。;Monthly…
The Cu/Mo/Cu cladding metal materials were made by hot rolling.The interface structure,fracture characteristic and the effect of rolling process parameters on bond strength were studied by optical microscope,scanning electron microscope and electron-tensile tester.The results show that the bonding interface of composi…