Materials Literature
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By means of the complex variable function method and using the technique of conformal mapping,the anti-plane shear problem about an circular hole with a straight cracks in one-dimensional hexagonal quasicrystals was investigated and the solution of the stress intensity factor(SIFs)of modeⅢ was found out.Under the cond…
Outdoor exposure tests of 7B04 aluminum alloy were carried out in Qingdao and Hainan.Corrosion samples were investigated by mass loss,SEM,EIS methods.The results showed that at the initial stage pitting corrosion emerges on the surface of 7B04 alloy in Qingdao and Hainan,and transform into general corrosion later.Both…
Cationic polystyrene-acrylate emulsion was modified by perfluoralkylacrylate with two-stage emulsifier-free polymerization,in which 2-(perfluoroalkyl)ethyl acrylate was used as the fluoro containing monomer,methacryloxyethyltrimethyl ammonium chloride(DMC)and acrylamide(AM)were used as the cationic and hydrophilic mon…
The Al2O3 ceramic was implanted with nickel ion using a metal vapour vacuum arc(MEVVA) ion source.And then a thin copper film was made on surface of the ceramic by copper electroless plating.The characteristics and microstructure of the bonding were studied by scanning electronic microscope(SEM).The results show that…
The nanometer WC-10Co(mass fraction) composite powders were prepared by high energy ball milling for short time and carbonation reaction using W,C and Co powders as raw materials.The phase composition and morphology of the composite powders after ball milling and carbonation reaction were analyzed by XRD and SEM.The p…
The causes of corrosion of recycled water tower in oil refinery factory were analyzed.PF-01 anti-corrosive coating and polyamide epoxy coating were selected as corrosion protection coatings for the concrete and steel structures of recycled water tower,in which water is sprinkled for a long time,and glass-reinforced ep…
In this paper,an example of weld cracks in pipeline,a brief analysis of the 18Cr- 10Ni-Ti-type austenitic stainless steel during welding cracks,and proposes a targeted preventive measures for similar 18Cr-10Ni-Ti-type austenitic stainless steel construction to provide useful lessons.
The corrosion inhibition function of various environmentally acceptable inhibitors ( Na2 WO4,Na2B4 O7,C6 H11O7Na and C15H29NO3Na) on 304 stainless steel in 3.5% NaCl solution was evaluated by using dynamic potential scanning technique.Results show that Na2WO4,Na2B4O7 and C6H11O7 Na are able to retard the induction and…
Critical simulations of model hypoeutectic alloys were carried out with the KKSO multi-phase field model to study the lamellar-rod eutectic transition.The result shows that the lamellar-rod eutectic transition does not appear abrupt but occurs over a range of compositions.Under the condition of isotropic interface ene…
Objective To evaluate the cellular biocompatibility of the carboxymethyl chitosan calcium (CCC)composite by observing the morphology and proliferation of murine bone marrow stromal cells(BMSCs) in vitro. Methods CCC was synthesized and then analyzed by an infrared spectrometer (IR). CCC extraction prepared with DMEM (…
The adsorption behavior of poly(methyl methacrylate)(PMMA) on the surface of alumina nanoparticles was studied,the amount of adsorbed PMMA was examined with thermal gravimetric analysis(TGA) and the fraction of bound carbonyls of adsorbed PMMA was determined using transmission Fourier transform infrared spectroscopy(F…
Malleable iron lost the interest and the development stopped in the turbulent seventies of tremendous developments of new technologies. The personal computer, emission spectrometer, thermal analysis, cold-box core system and automatic vertical moulding were introduced into the foundry industry. Experience shows that t…
In this paper,pure gallium gadolinium garnet(GGG) nano-powders codoped with Yb3+and Ho3+ were prepared via sol-gel low combustion method.X-ray diffraction showed that the sample completely crystallized after calcined at 900 ℃.IR analysis showed the peaks appeared at 617 cm-1 were lattice vibration of GGG.Further,SEM s…
Degradation of polypropylene prepared by UV irradiation through reactive extrusion modification process was studied in this paper.The PP sample extruded under different UV irradiation temperature was structure characterized by IR.The influences of BP mass content,screw speed and feeding speed on degradation process of…
A novel method for fabricating laccase electrode was developed by immobilizing mediator on multi-walled carbon nanotubes(MWCNTs) with laccase using chitosan as fixative.The mediator 22-azinobis(3-ethylbenzothiazoline-6-sulfonate)(ABTS)was introduced to permit effective shuttling of electrons between laccase active si…
The non-chromic anhydride electropolishing solution,which were used for austenitic and ferrite stainless steel and mainly constituted by phosphoric and sulfuric acid,was developed.The effects of the components in electrochemical polishing solutions and process parameters on the polishing performance were investigated.…
The mechanical properties of nano-crystalline β-SiC with different grain sizes and strain rates,as well as the toughing characteristics of β-SiC nano-laminates were studied with the molecular dynamics method.The Nose-Hoover and Berendsen methods were adopted for controlling temperature and pressure respectively.The Te…
In this paper,self-made nano-hydroxyaptite/chitosan(n-HA/CS) composite was used for solid phase of bone cement.While the liquid phase was citric acid and acetate acid according to a certain percentage.The design orthogonal was tested to determine the best ratio of the system from the coagulation time and compressive s…
Potassium chloride is a kind of important inorganic chemicals,and has been comprehensively applied in industry and agriculture production.85% of the potassium chloride products is directly used as the fertilizer,while the rest as the raw materials to produce caustic potash,potassium sulfate,potassium nitrate and potas…
There are significant correlations between skirt shape and sorts of fabrics.40 kinds of silken fabrics are selected as subjects,and their mechanical properties of tensile,shear and bending of those fabrics are tested by using KES.The classification method based on Euclidean distance and optimum cluster can be determin…