Materials Literature
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In this paper,non-diffracting beam generated by the axicon was analyzed using geometrical optical method and the expression of the maximum non-diffracting distance was given.The non-diffracting beam was traced using the optical design software ZEMAX,and the transverse optical intensity distribution was also simulated.…
Cp/SiC matrix composites were fabricated by the hot pressure sintering technology,and low-temperature short-term oxidation behavior was studied.The effect of oxidation process on the phase constitution,microstructure and mass loss behavior of Cp/SiC matrix composites with different carbon powder content was analyzed.T…
The extractive from Neosinocalamus affinis leaves was investigated as an excellent environmentally-friendly plant inhibitor.The inhibition effect of the plant extractive on the corrosion of cold rolled steel(CRS) in 0.5 mol/L H2SO4 has been studied by weight loss and potentiodynamic polarization methods.The results sh…
Thixotropic compression tests on semi-solid billets of SiCp/AZ61 composites fabricated with the method of stirring-melt casting and isothermal heat treatment were carried out by the Thermecmastor-Z dynamic material testing machine.Effects of SiC particles volume fraction on the true stress and microstructure were emph…
Fluorescence emission spectra of nine species of unicellular algae,including five species of flesh green algae Chlamydomonas nivalis UTEX 2765,Chlorella ellipswal CH,Chloroccum tatrense UTEX 2227,Scenedesmus obliqnus,Haematococcus sp.CSIRO:CS-321;four species of diatom Phaeodactylum tricornutum,Cheatoceros mulleri CH,…
The nature of species formed in the system of calcium-containing ferric aluminum chloride with micro-silicon was explored with transmission and scan electron microscopy coupled with energy dispersive spectroscopy(TEMEDS,SEM-EDS),selected region electron diffraction(SRED),chemical analysis for the liquid samples,fourie…
In order to increase the anti-abrasion of the ring for longer service life,analysis is done to the current status of the domestic products and the difference from the products by Bracker Swiss.Introduction is made to the process making rings of chrome 100,specifications in contrast to the rigidity of the products by B…
As a kind of extracellular polysaccharide secreted by genus Acetobacter,bacterial cellulose(BC),is a new research focus due to its unique properties.In the paper,the preparation of BC-based materials,BC modifying material and BC recombination material,were introduced,and the potential applications of BC-based material…
The structural characteristic and surface physicochemical properties of bagasse magnesium lignosulfonate(MLS) are investigated by means of GPC、UV、IR and 13C NMR.Four purified MLS fractions with different molecular weights were obtained by fractionation using ultrafiltration and analyzed.The results show that MLS conta…
Objective To investigate the technology for purifying and separation of total favanoids from fresh maize seedling with different types of macroporous resin(MR).Methods The static capacity adsorption and static elution ratio of 8 types of MR were studied respectively and compared.The dynamic saturation ratio,dynamic ad…
The influence of the electron-phonon interaction to the band structure of graphene is studied.The interaction between electron and the longitudinal optical phonons is taken to be a perturbation,then the corrections of the interaction to the band structure are calculated using the perturbation theory.The calculation sh…
A method of surface hardening based on the technique of electric contact strengthening with high current was studied.A set of electric contact strengthening equipment was developed.The effects of current on thickness,width and hardness of the hardened layerwere analyzed.The wearresistance of hardened layerwas measured…
With higher requirement on the quality and preservation time of fruits and vegetables and increasing environmental awareness,functionality,environmental friendliness,and simplicity have gradually become the main trends in fresh -packaging of fruits and vegetables.The article summarized the latest progress of fresh-pac…
The grain boundary character distributions(GBCD),the misorientation and the development of recrystallization texture in TWIP steel sheets were investigated by Electron Back Scatter Diffraction(EBSD).The results indicate that with the increase in annealing temperature,∑1 coincidence grain boundary decreases and ∑3 coin…
Silicon carbide whisker/resin matrix composite was prepared by UV Stereolithograghy(SL),and the microstructure and mechanical properties were studied.The microstructure shows that dispersing the silicon carbide whisker in the photosensitive resin makes material fracture mode change from brittle fracture to ductile fra…
The electron emission yields from the interaction of slow highly charged ions (SHCI)He2 + ,O2 + and Ne2 + with clean Si surface are measured separately.It is found that electron emission yield γ increases proportionally to projectile kinetic energy EP/MP ranging from 0.75 keV/u to 10.5 keV/u (i.e.3.8 × 105 m/s≤vP≤ 1.4…
Cf/SiC composite and TC4 were successfully joined by the mixed powders of Ag,Al,Ti and short carbon fibers under vacuum condition.The microstructure of the joints was investigated by X-ray diffraction,scanning electron microscopy and energy dispersive spectrometry.The results show that the maximum shear strength is 90…
The solidification structure and mechanical properties of Al-Si7-Mg0.8 aluminum alloy modified with the Ce-rich RE by lost foam casting(LFC) were studied.The results show that Ce-rich RE can refine the grain size of eutectic silicon in the Al-Si7-Mg0.8 alloy,and reduce the alloy porosity.When the addition of RE is 0.3…
In this paper,the 3D architecture composites conducted by the quasi-static tensile test,and with the finite element software ANSYS/LS-DYNA,a calculation of the quasi-static process is preceded.In order to identify the accuracy of the calculation,a comparison is conducted between the results gotten from the tensile tes…
Factors of influencing the weatherabilities of rigid PVC products were analyzed,and the influences of calcium/zinc stabilizers on the properties of rigid PVC products were studied.