Materials Literature
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The additional loss is a very important reference index in the design of a converter transformer.In this paper,the skin depth control based solid model 3-D layer-meshing method and the magnetic loss calculation method were described.Using the software MagNet,the tank and clamps losses in a converter transformer were c…
To investigate the influences on the one-step process POY(pre-oriented yarn)/FDY(fully draw yarn) combined yarn by steam setting process and relaxation heat treatment respectively,the heat shrinkage rate and tensile properties as well as the shrinking structure of the combined yarn were studied.After the steam setting…
Cementitious materials special for high performance concrete with high volume of fly ash and slag and less cement clinker were prepared by optimizing the proportion of ingredients and the size fraction and using an additive. The effects of grinding modes, gypsum amount and the mix proportion of slag to fly ash on the…
Nanocellulose crystal was prepared by sulfuric acid hydrolysis.The effects of sulfuric acid mass fraction,temperature and time on the yield of nanocellulose crystal were optimized with response surface methodology.The mathematical model was established using the Design-Expert software.The effect of various factors and…
High-quality YAG transparent ceramics were fabricated by vacuum sintering technique using the slip casting with anhydrous ethanol as the dispersion medium.The in-line transmittances of the polished sample with the thickness of 3 mm are about 79% in the visible band and 80% in the infra-red band,respectively,which are…
This paper overviews the development of the single diamond machines used in weapons and commercial fields,and introduces nowadays widely-used commercial ultra-precision diamond turning machines.Then,it analyzes the key techniques to achieve nanometer-level precision machining,such as air bearing work spindles,oil hydr…
The quench sensitivity of an Al-7.5Zn-1.7Mg-1.4Cu-0.12Zr alloy was determined by temperature-time-property(TTP) curve by an interrupted quench method with the measurement of the hardness as aged and electrical conductivity as quenched compared with traditional 7B04 alloy and 7150 alloy.The results indicate that the no…
A new approach,low-voltage pulsed magnetic field(LVPMF) technique,to refine metal materials was developed.The effect of the LVPMF on the solidified structure of magnesium alloys under common casting and direct casting conditions was investigated.The results show that the grain refinement effects on AZ31,AZ91D,AZ80,AM6…
Hatching enzymes(HEs) are a kind of proteases that play a key role in hatching of metazoan eggs.By means of bioinformatic analysis and RACE technology,we cloned a full length cDNA(998 bp) of the hatching enzyme-like gene from Antheraea pernyi embryo,which was designated as ApHEL(GenBank accession:JN205047).The ApHEL s…
Ultra-fine HMX booster was developed by coating ultra-fine HMX with Vinton(FPM2602).The mould powder of ultra-fine HMX booster was preparated by supercritical SAS technology.The FT-IR and SEM was employed to characterize the coated sample,impact sensitivity was measured and analyzed.The factors of coated effect what c…
2,2-Dinitropropyl acrylate-styrene(DNPA-St) copolymer was synthesized by free radical polymerization in ethyl acetate by using azobisiosbutyronitrile as initiator.The structure and properties of DNPA-St copolymer were also characterized by FTIR,1H NMR and DSC measurements.The behavior of the copolymerization between 2…
The growing demand for increased size of hydrogenators operating at higher process conditions,Vanadium has been added to 2.25Cr-1Mo steel to enhance high temperature strength in 80s of 20th century.The addition of Vanadium influences hydrogen trapping,diffusion and stress relaxation,and response to welding and heat tr…
Cerium-doped lutetium orthosilicate(Ce:Lu2SiO5,LSO) scintillation ceramics were fabricated by using spark plasma sintering(SPS) technique starting from synthesized submicron polycrystalline LSO luminescent pow-der.Polycrystalline translucent LSO ceramics were rapidly densified under optimized sintering conditions of 1…
The expanded graphite as raw material was oxided by liquid stripping method and modified hummers graphite oxide process. And the hydrazine reduction of pre-reduction and high temperature were carried out to graphite oxide and the productions were charactered by SEM, TEM, Raman and EDX analysis. The results indicated t…
The influences of the concentration of S2-and CO32-,the change of pH value,temperature and flow velocity of brine on the corrosion behavior of 2205DSS in brine were studied by electrochemical method.The results show that the best technology is using two-alkali method.When S2-has a concentration of 1.00 g/L,pH=8.35,CO3…
To suppress the corona,the electric field intensity on the jumper and spacers should be reduced by optimizing structures.Consequently,we constructed a three-dimensional calculation model of the strain tower to compute the electric field distributions of jumpers and spacers,and proposed and compared a variety of optimi…
To research the influences of types and parameters of insulation material on electric field intensity and potential distribution of insulator,utilizing finite element method(FEM) and taking post insulator as the research object,the electric field intensity and potential distribution of insulator and adjacent region as…
Micro tubular solid oxide fuel cells(MT-SOFCs)have not only the inherent benefits of SOFCs,but exhibit new advantages over conventional SOFCs,such as higher mass transfer/heat transfer,higher reaction efficiency,rapid start-up/shut-down and significantly reduced volume.Therefore,MT-SOFCs show potential applications in…
By measuring internal bonding strength of the particleboard and by means of CP-MAS 13C NMR analysis,the properties of protein-based adhesives modified with glyoxal and formaldehyde were comparatively studied with two kinds of typical raw materials rich in protein,i.e.,soy flour and gluten.The results showed that there…
The microstructure,dislocation and precipitation phases of X80 pipeline steel produced with different processes were analyzed by optical microscope and transmission electron microscope (TEM) contrastively,and the influence of structure pattern on the performance of X80 pipeline steel was studied.The result shows that…