Materials Literature
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SiC nano particles reinforced AZ61 magnesium matrix composites were fabricated by ultrasonic method. The technological parameters, such as the SiC nano particles content, ultrasonic treatment temperatures and times, were examined by using of orthogonal test. Experimental results show that SiC nano particles content ha…
Li3V2(PO4)3 has become an attractive cathode material for lithium-ion battery since it has excellent electrochemical performances.The structure and charge-discharge mechanism of monoclinic lithium vanadium phosphate [α-Li3V2(PO4)3] were introduced.Several main preparing methods of the material were summarized,includin…
The flame retardant mechanism of acrylic ester pressure sensitive adhesives was stated based on analysis of their adhesion characteristics and structural features.Comparisons of various preparation methods indicate that environment-friendly noumenal flame-resistant adhesives are the research direction in the future;an…
To fabricate high voltage,high energy density ceramic capacitors,the effects of different amounts of PbO–SiO2(PS) glass additive on the densification behavior and dielectric properties of Ba0.4Sr0.6TiO3 ceramics were investigated. The results show that the PS glass effectively decreases the sintering temperature,incre…
Two types coatings derived from nano-sized and micro-sized Al2O3-13%TiO2 feedstock were fabricated on stainless steel substrates using air plasma spraying.Their tribological properties under liquid paraffine lubricated conditions were investigated by a SRV friction and wear instrument sliding against stainless steel b…
A refined structure was obtained on Zircaloy-4 through ultra-sonic shot peening (USSP) treat-ment and characterized by optical microscopy (OM), X-ray diffraction (XRD) and field-emission gun scan-ning electron microscopy (FEG-SEM). It has been found that the treated sample consists of three grain struc-tures: surface…
The cerium-doped yttrium aluminum garnet(YAG∶Ce3+) phosphors are synthesized via a hydrothermal homogeneous precipitation-molten salt method(HHPMS).The powder structure,morphology and photoluminescence are characterized by XRD,SEM and fluorescence spectrophotometer,respectively.The results indicate that the YAG∶Ce3+ p…
ZnO thin films were deposited on SiO2 substrates by reactive magnetron sputtering.Effects of oxygen concentration(volume fraction range of 40%~60%)on surface morphology and microstructure of the thin films were studied by AFM and XPS.Results show that with increase of volume fraction of oxygen,the c-orientation growth…
Taking ZrO_2 as zirconium source,carbon black as carbon source,and Mg powder as reductant,the ZrC micro powders are prepared by mechanical alloying and high temperature sintering.Using XRD and SEM,ZrC powders are also observed and analyzed.The thermodynamic analysis is also concerned with the production of different r…
The hot working die steel 4Cr5MoSiV1 was nitrocarburized to raise its wear and thermal fatigue resis-tances.The test results reveal that the quality of 4Cr5MoSiV1 steel products gas-nitrocarburized with NH3 and CO2 is stabler as compared with the other gas-nitrocarburizing technologies,and that the surface hardness of…
Meso-5, 10, 15, 20-tetra (N, N-dimethylaminophenyl) porphyrin Fe ( Ⅱ ) [TDMNPPFe ( Ⅱ )] were synthesized by one pot method of mixed solvents (propionic acid, acetic acid and nitrobenzene), using Fe(Ⅱ) as template. It was adsorbed on the VulcanXC-72 carbon with different proportion and then heat-treated on temperature…
Emulsion explosives matrix(EEM) is a special viscoelastic body lies between solids and liquids,it is high viscosity and low thermal conductivity,etc.In this paper we first analysis the conductivity mathematical model of micro EEM,and found some holes was in its inner and its conduction depend on the molecules vibratio…
The conventional methods of biochemical analysis on the composition and amino acid contents of the muscle of Hemicutler leucisculus from Xinfengjiang reservoir was adopted.The results showed that the water contents in muscle accounted for 76.87%,and there is 18.50% crude protein,2.40% crude fat and 1.30% ash in muscle…
Effects of thermal cycling on the tensile properties and fracture behavior of Ti-6Al-4V(TC4) alloy at temperatures ranging from 78K to 293K were evaluated by use of thermal mechanical cycling system,MTS universal testing machine,optical microscope and scanning electron microscopy(SEM).With increasing thermal cycles,an…
In order to prepare a conversion coating on AZ91D magnesium alloy with phytic acid, the process parameter was optimized through an orthogonal experiment. The coating corrosion resistance was studied with the electrochemistry technology of polarization curve and E-t curve, and the coating micro-morphology was observed…
The fundamental of load cell for resistance strain gage was adopted to investigate hysteresis property of 17-4PH steel treated with different heat treatment process,and the effect of heat treatment on microstructure and hysteresis property of 17-4PH steel was examined by transmission electron microscopy(TEM) and inter…
Phenazine with high purity above 99.5% was separated from waste of industrial production of RT base by solvent extraction and recrystallization. Phenazine methyl sulfate was synthesized from this phenazine with a purity of above 98%. Technical parameters for the separation and purification of phenazine from the waste…
The effect of Ca and Y on ignition temperature of ZK60 alloy was studied.The results show that the ignition point increases 171℃ by the addition of 1.62wt%Ca comparing with ZK60 alloy.XRD,SEM EDS analyses show that oxide film with three layer structure forms on the surface of ZK60-1.62Ca alloy,which is mainly composed…
High-tech fibers,produced by using high-tech and new processes,include high-performance fibers with high strength,high modulus and high temperature resistance,super silk fibers with perfect wearing properties and high-function fibers with special functions.The status and progress of high-tech fibers were discussed.The…
By ANSYS/LS-DYNA software, the effect law of penetrator formation with configuration parameters of shaped charge of subcaliber hemispherical liner was simulated numerically. Annulus initiation was used,the configuration of shaped charge of subcaliber hemispherical liner was optimized and designed, optimization combina…