Materials Literature
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This paper reviewed methods of reducing apparent viscosity of chitosan spinning dope at home and abroad.According to tests,two kinds of reducing methods,adding melamine and rising temperature in short time,were put forward and analyzed.The results shows that adding melamine may be appropriate to enhance the solubility…
The article describes the capabilities and features of meta-aramid and LFR.The process flow and its technical essentialities are analyzed, i.e.the quantity in the drawing process should be small;and the key points of the open and cleaning process should be simplified process, light but frequent plucking, loosing inste…
The spheroidal particles powder was fabricated by fog spraying particle forming from nanostructure Al2O3,TiO2,SiO2 and SiC powder and the nanostructure coatings on steel substitute were made by plasma spraying.The coating sample were heated and kept 10 min at the temperature of 500,700,900 and 1 100 ℃ respectively,and…
A micromechanically analytical model using an influence function superimposition technique and the shear-lag model is developed to derive stress profiles for any configuration of breaks in continuous fiber-reinforced metal matrix composites(MMCf),including the effect of local plasticity of matrix properties and interf…
Epoxidized soybean oil(ESO)-benzoxazine-phenolic copolymer(ESO-PA-PF) was synthesized,which shows good toughness and thermal stability.Fourier transform infrared spectroscopic(FT-IR) was adopted to characterize the molecular structure of the modified resin.The curing behavior of ESO-PA-PF was studied by differential s…
The deformation behaviour of {[(Fe0.6Co0.4)0.75B0.2Si0.05]0.96Nb0.04}96Cr4 bulk amorphous alloy with a diameter of 3 mm and the influence of loading rate on its plastic deformation were investigated by the technique of nanoindentation. The results show that the {[(Fe0.6Co0.4)0.75B0.2Si0.05]0.96Nb0.04}96Cr4 bulk amorph…
By theoretical analysis and calculation current change relations of three common open-phase of a three-phase asynchonous motor are derived and discusses protective action of bimetallic trip thermorelay in open-phase running of three-phase asynchronous motor according to its basis.
The influences of aging treatment on the microstructure and mechanical properties of 2205 duplex stainless steel were studied.The results show that the severe embrittlement occurs in the 2205 duplex stainless steel after aging at 475℃.The cause of the embrittlement is the dislocation structures in the aged δ-ferrite d…
Low-temperature fracture of materials is a frontier topic in scientific research,which is important for engineering applications.In this paper,the low-temperature fracture and investigation advances at home and abroad are reviewed.The new experimental technology,new theory and new materials,such as nano-materials abou…
Influence of reactant and its concentration was studied on preparation of NiO nanoparticles over SiO2 surface via adsorption phase reaction technique. Titration methods were used to measure the change in adsorption of the reagents on the support surface. NiO particles prepared by different reagents were characterized…
MgF2 and ZnSe are separately used to create photonic crystal with defect layer,and the characteristics of the photonic crystal has been studied in theory and experiment.In experiment,a spectrum analyser is generally used to measure the spectrum of transmitted light which traverses phonic crystal.But it is not a good w…
The thermodynamic performance of various minerals in ocean multi-metal nodule in the process of Li1+xMn2-xO4 synthesis with LiOH·H2O and ocean multi-metal nodule as raw material is investigated.It is shown by the calculation results of the thermodynamic data ΔG and ΔH that manganese ore and goethite in multi-metal nod…
Pitting corrosion of 1Cr18Ni9Ti stainless steel had been monitored by electronic speckle pattern interferometry(ESPI).Microscopy and atomic force microscopy were used to investigate the sample surface and microstructure of the corrosion pit.It was concluded that the speckles in ESPI were caused by the pitting corrosio…
Objective To explore whether superparamaganetic iron oxide nanoparticles (SPIO) can be used as a tracer for tracking the implanted mesenchymal stem cells(MSCs) in the infarct border zone under MRI scanning. Methods MSCs were cultured in vitro, labeled with SPIO, and then stained with Prussian blue to assess the rate o…
The IA-SSS-MA terpolymer was prepared from IA(Itaconic acid),SSS(styrene sulfonic sodium),and MA (maleic anhydride) by the free-radical polymerization in aqueous solution.By using the static experiment method,the effect of inhibition with amount of terpolymer and the mass concentration of Ca2+ had been studied,and the…
Taking silicone, acrylic and amino resin as film forming materials, talc powder as filler and with addition of different types of additives and solvents, high temperature resistant silicone modified coatings with low cost was prepared. The effects of application condition on film performance were analyzed.
As a highly effective absorption materials,activated carbon fiber is superior to granular activated carbon(GAC) in many aspects.However,GAC has much wider applications.The application and progress of activated carbon fibers in cigarette filter in the last twenty yearsr were reviewed and its prospect was discussed.
The microstructure performances of argon protect high-frequency induction brazing interface of Al/45 steel were studied by means of SEM, electron probe microanalysis (EPMA), micro-hardness test and X-ray diffraction (XRD). The results indicated that the wetting effect of the bonding interface was excellent and there w…
Viscidity is one of the most important parameters of the UF resin performance indexes,and the control over viscidity has direct influence on the use of UF resin.Based on the characteristics of UF resin synthesized,with final molar ratio being 1.05,through the study on the final viscidity and the viscidity in the proce…
Under the circumstances of axial symmetric and non-static charge-current distribution,we propose an alternating iteration method of calculating off-axis electromagnetic field by using the Maxwell's equations and axial symmetry.