Materials Literature
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When SMA connectors connecting to mini-coaxial RF cable,new requirements are needed for the connecting structure and the assembling process because the cable is thin and flexible.The mating structure of the SMA connector is designed emphatically.The connecting structure can meet the electrical performance of the conne…
Highly ordered anodic aluminum oxide(AAO) templates were prepared by a two-step anodic anodization.Gold nanowire arrays were fabricated into the AAO templates via pulse DC electrodeposition.The morphology and crystal structure of gold nanowires were researched by scanning electron microscopy(SEM)、transmission electron…
The P(MA-AA)was synthesized,and the P(MA-AA)/PEG hydrogels were prepared by cross-linking reaction between long chain PEG and P(MA-AA).The structure of P(MA-AA)and P(MA-AA)/PEG hydrogels were characterized by FT-IR spectrometry.The swelling ratio(SR)and swelling rate of the hydrogels at different pH values was tested.…
It is difficult for the traditional metal oxide gas-sensing materials to meet the high performance gas-sensing devices requirement due to the low sensitivity,poor selectivity and high working temperature.Nano-sized material with a high specific surface area can improve gas-sensing properties notably.Herein,sin gle cry…
A relationship diagram of the spindle speed and the surface micro-hardness was obtained in high-speed milling experiments. The prediction model of micro-hardness distribution along the depth was obtained. The morphology of work hardening can be visually observed by SEM. The formation mechanism of the metamorphic layer…
Micropolar stresses and strains of three-dimensional(3D) Cosserat continuum are analyzed first,then a basic 3D Cosserat continuum theory and 3D 20-node finite element formulations and corresponding user element subroutine based on the subroutine UEL offered by numerical analysis software ABAQUS are developed.The defle…
The rice-straw particleboard overlaid with sliced bamboo veneer was manufactured with PVAc,and the physical and mechanical properties were studied.The results showed that the MOR and MOE of the overlaid particleboard were excellent,and the surface bonding strength was good.The particleboard could have warm water resis…
Vulcanized Fluoroelastomer 26 rubber were prepared via three kinds of curing system including: 3# vulcanizator,bisphenol AF/BPP system,DCP/TAIC and then the anti-hydrogen sulfide aging test in different temperature was carried out according to NACE standards using Autoclave Test system produced by American Cortest Cor…
In recent years,high performance thermoplastic polymer matrix composites have attracted the attention of researchers.Polymer based composites are being more and more used as tribomaterials due to their light weights and good tribological performances especially under dry sliding conditions.Poly(ether ether ketone),whi…
Sar anise-microstructured CuO is successfully synthesized with 1 m mol CuCl2 as copper source and 1 m mol Na2CO3 as auxiliary salt at 240 ℃ for 48 h via the simple hydrothermal method.The phase,the morphologies and the optical absorption property of the samples have been characterized by X-ray diffraction(XRD),scannin…
Density functional theory calculations have been performed on fullerenes C40 and its atom endometrial complex M@C40(M=Li,Na,K,Be,Mg,Ca) to put insight into the relationship between their geometrical and electronic.The results show that,in the stable geometry of M@C40,atom located at different positions of the carbon c…
In order to improve the toughness of the cured aromatic tetrafunctional epoxy resins,a dimer carboxylic acid named dimer fatty acid(DFA)was used to modify an aromatic tetrafunctional epoxy,N,N,N',N'-tetraglycidyl-2,2-bis[4-(4-aminophenoxy)phenyl]propane(TGBAPP).The curing behaviors of DFATGBAPP/MNA(methyl nadic anhydr…
Aiming at the disadvantages of long cycle,low selectivity and high level control of temperature in the production of sodium gluconate by traditional biological fermentation method,Au/TS-1 nano catalysts were prepared by three kinds of method and characterized by surface area and pore volume using nitrogen adsorption u…
Melting iron metal with intermediate frequency furnace, in accordance with the traditional furnace charge technology, castings produced are often with coarse graphite structure and low density. Through process optimization, using high grade scrap instead of foundry pig iron to improve the metallographic structure of g…
Diamond/copper composite with different diamond volume fraction were prepared by ultrahigh pressure sintering.The effects of sintering temperature,sintering pressure and sintering time on the component interface status and thermal conductivity of the composite material were investigated.The phase composition,morpholog…
The durability of a concrete structure is an urgent issue to be addressed in the engineering field.PVA(polyvinyl alcoho)l fiber reinforced cement matrix composites(PVA-ECC)have broad application prospects in development of cement based products,bridge and road construction,structure strengthening,etc.This article expo…
A highly active and selective Cu-ZnO-Al2O3catalyst(denoted as RK-11)was prepared for hydrogenation of CO2 to afford methanol,and the catalytic performance of as-prepared RK-11 catalyst was evaluated.Results show that,when raw material gas consists of68.5% H2,2.0% CO,20.5% CO2,and 9.0% N2,while temperature,gas hourly s…
With the emulsion polymerization method,making use of the PP-xylene solution,the coreshell polymerization of the aniline monomer was carried on.The effect of the amount of PP-xylene,dodecylbenzenesulfonic acid(DBSA),ammonium persulfate(APS) and the pH values on the physical and chemical properties of the core-shell st…
In the production process of induction heating oil quenching and tempering spring steel wire,the smoke produced in oil quenching process has great hazard on health of workshop operators,workshop environment is poor. To change oil into water,diameter 12. 5 mm 55SiCr spring steel wire is water quenched and oil quenched…
The ignition characteristics and the law of hot-spot formation on composite explosive subjected to drop weight impact were investigated by using the coupled thermo-mechanical method,selecting the thermo-elastic-plastic material model from nonlinear dynamics finite element software ANSYS/LS_DYNA,and simulating chemical…