Materials Literature
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The mechanical properties of T700/3234 Laminate were studied in this paper,T700/3234 Laminate ply was [45°/-45°/0°/90°/0°]1S.T700/3234 unidirectional carbon fiber reinforced epoxy prepreg cured at 125℃ is suitable for autocalve processing method.The tensile properties、compress properties flexural properties,interlamin…
The paper provides an overall introduction of the status of practical superconducting joints preparation technology,assesses characteristics of certain current important superconducting joints preparation technologies such as brazing joint,diffusion welding joint,dip welding joint,sintering process joint and cold pres…
A graphene-polypyrrole nanotube hybrid is fabricated by chemical hybridization method.Scanning electron microscopy,transmission electron microscopy,fourier-transmission infrared spectroscopy,X-ray photoelectron spectroscopy and electrochemical workstation are used out to characterize the morphology,structure and prope…
Fish skin of Clarias fuscus was a by-product of freshwater aquatic products processing, which is rich in resources. To improve the utilization of aquatic by-products, the fish skin of Clarias fuscus was used as raw materials for acid-soluble collagen(ASC) extraction at 4 ℃.It's the physicochemical of the extracts was…
The situation of energy-conservation and discharge-reduction for the foundry industry in our country,the development objective in development project in the 12th Five-Year Plan as well as the new method and application for energy-conservation and discharge-reduction for the foundry industry are introduced in the paper…
In order to improve the mechanical and tribological properties of nitrile rubber( NBR),the surface chemical modification w as performed w ith the oxidation solution mainly formulated by the concentrated sulfuric acid. The effect of sulfuric acid concentration and immersion time on both mechanical and tribological prop…
Through the hardness,impact toughness,tensile strength,yield strength and metallographic analyses,we research the effects of heat treatment process on microstructure and mechanical properties of die material H13 steel.The results indicate that H13 steel can make the hardness meet large extrusion die design requirement…
Based on the industrial production of non-oriented electrical steel,rare earth(RE) alloy treatment during the RH refining process was studied.The results showed that the effects of desulfurization and total concentration of RE remained in steel mainly depended on the chemical compositions of different steel grades.For…
Bamboo pulp fiber also called regenerated cellulose fiber is a new type of green health textile material.Due to its special performance,it will become one of the hot spot of domestic textile development with great development potential.To introduce the performance characteristics,the production process and some proble…
1,1′-Dihydroxy-5,5′-bitetrazole(H2DHBT) was synthesized via the reactions of substitution and cyclization using dichloroglyoxime as starting material with the total yield of 73.4%.The thermal stability of H2DHBT was studied by differential scanning calorimetry(DSC).Its exothermal decomposition peak temperature was 231…
The flow field in an automotive catalytic converter with dual substrates was numerically simulated by the computational fluid dynamics method(CFD). Flow uniformity index calculated by reasonable statistical formulas was used to analyze the effects of the gap width between the substrates,cell density,and substrate leng…
The precipitation kinetics function of B2 type intermetallic compound was established based on the microscopic phase-field kinetics theory,and it was used to investigate the formation and the motion of B2-FeAl ordered domain boundaries during aging of Fe-Al alloy.The results demonstrate that the nucleation incubation…
Johnson-Cook(J-C) material constitutive model is inaccurate for machining simulation of titanium alloy with high temperature and heavy impact.In this study,a modified constitutive model of Ti-6Al-4V alloy based on recrystallization was established considering the phenomenon of stress decline during machining.High-temp…
Long afterglow phosphor MgSiO3: Mn2 +,Nd3 + was prepared by solid-state reaction.The luminescent properties of the samples were characterized by XRD,excitation and emission spectra and afterglow light curves.The results show that the content of Nd3 + does not obviously affect the crystal structure,but influences the e…
A copper plating process for blind via filling was introduced.The bath composition and process conditions are as follows:CuSO4 ·5H2 O 200 g/L,H2 SO4 75 g/L,Cl 55 mg/L,inhibitor(polyethylene–propylene glycol monobutyl ether) 30 mL/L,leveling agent(a nitrogen-containing heterocyclic compound) 3 mL/L,accelerator(sodium N…
The dynamic mechanical property,adiabatic shear susceptibility,adiabatic shear band and absorbed energy of 4 kinds of α+ β titanium alloys,i. e.,TC4,TC6,TC11 and TC17,at 3000s- 1strain rate,were investigated. The results show that the adiabatic shear susceptibility of TC17 and TC6 titanium alloys is lower than that of…
The quartz sand was surface modified using silane coupling reagent KH-550 to improve the hydrophobicity of filter medium as well as increase the oily wastewater treatment performance.The effect of the concentration of the silane coupling agent KH-550,modified temperature and stirring time on modification were studied…
Ce-Co-La-O composite oxide support was prepared by a modified coprecipitation method and the Cu-based catalyst(Cu/Ce-Co-La-O) was then obtained through incipient impregnation;the performance of the Cu/Ce-Co-La-O catalyst in the selective reduction of NO with propylene in excess oxygen was investigated and the relation…
Nd3+:ZnO-B2O3-Al2O3-SiO2 transparent glass-ceramic was prepared by melting and crystallization technology.The nucleating agent content on Nd3+:ZnO-B2O3-Al2O3-SiO2 transparent glass ceramic nucleation and crystallization performance were investigated by DTA,XRD,SEM,UV-Vis-NIR spectrophotometer,fluorescence spectrum mea…
Alloy design,heat treatment process and microstructure and properties relationship of 621 MPa(90ksi) grade oil well casing steels of H2S resistant corrosion were studied.Such two kinds as 0.08C-0.8Mn and 0.20C-0.8Mn of low C-Mn tested steels were designed,respectively.And the effect of dislocation,precipitation and ca…