Materials Literature
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A cored wire containing the boron carbide ceramic powder and other alloying elements powder was fabricated with 304L stainless steel sheath and the metal ceramic composite coating was deposited by arc spraying.The feasibility of boron carbide in the application of arc spraying was studied.The microstructure,phase comp…
Pentaerythritol phosphorate melamine salt was synthesized by waterless way and was characterized by IR and TGA.The experiment results showed the P-N intumescent flame retardant was di-volution phosphorate structure.Its decomposed tempreture was about 200℃.Through the SEM observation,it was found that flame retardant f…
A novel method to fabricate in situ Au nanoparticles in solid matrix thin films of TiO2 and SiO2 and their absorption and reflectance properties are described. This method is based in a sol-gel process combined with a spin-coating procedure. The thin films are deposited on glass or Si (100) plates in order to measure…
In order to get foam zinc materials of porous metal electrode,a novel method for preparing foam zinc was proposed,in which the polyurethane foam with diameter of 0.3 mm as substrate was processed by degreasing,roughening,activation,electroless plating and electrodeposition.The main factors affecting the process such a…
The contact angles of NTO,GAP,HTPB and polyurethane were measured by means of dynamic contact angle/surface tension instrument.The surface free energies for these samples were calculated by contact angle data.Based on surface free energy,the values of adhesion for NTO-GAP, NTO-HTPB and NTO-polyurethane were determined…
Using superconducting powder interlayer was an effective way for diffusion bonding of BSCCO tapes. The content of Bi-2223 superconducting phase influenced the quality of joints. The Critical Current Ratio (CCRo) raised 18% by using the interlayer with a content 88.5% of Bi-2223 superconducting phase instead of using t…
Al2O3-based composite ceramic coating was prepared on the surface of magnesium alloy AZ31B via oxyacetylene flame spraying route in the presence of Al2O3 plus TiO2 as the ceramic backbone and Al-B2O3-TiO2 as the reaction system. The morphology, compactness, phase structure, thermal shock performance, wear resistance a…
A novel one-dimensional (1D) Cu(Ⅱ) nitronyl nitroxide complex bridged by iminodiacetate dianion [Cu(NIT4Py)(IDA)]n,where NIT4Py=2-(4'-pyridyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide and IDA= iminodiacetate dianion,was synthesized and structurally characterized by X-ray diffraction. It crystallizes in monoclinic…
In this chapter we describe the development and implementation of a computational method able to produce free energies in multiple dimensions, descriptively named the free energies from adaptive reaction coordinate forces method (FEARCF). We use this method to investigate the structure of associative liquids such as w…
Some recent studies on predicting impact sensitivity for different classes of energetic crystals based on first-principles band gap were reviewed.It is found that for energetic crystals with similar structure or with similar thermal decomposition mechanism,the smaller the band gap(ΔEg) is,the easier the electron trans…
Thin films of Y2O3 were successfully deposited onto Si(100) substrate by pulse electrostatic spray assisted vapor deposition method.The morphology,structure and optical properties of Y2O3 films were studied.The results of XRD analysis indicated that Y2O3 thin films were cubic with(111) oriented growth after annealing,…
By using the numerical simulations of the two-dimensional full equations of hydrodynamics,the phenomena of multistability in pattern selection of the Rayleigh-Benard convection in a binary fluid mixture with Soret effect in a rectangular cell were preliminarily studied.The phenomena include the multistability of the t…
With ab initio theory and elastic scattering Green's function method,electronic transport of organic molecule 1,4phenylene diisocyanide is investigated with two electrode configurations and coupling modes.Coupling properties,electronic transport spectrums,positions of turning-on voltage,distributions of conductance pl…
The causes to rubber surface cracking in application of the bottom rubber articulation joints for the link rods of anti-rolling torsional bars on metro vehicles for Shanghai No.1 Line are analyzed.The application effects on cars after the improvement of the product structure,testing verification and improvement are de…
To improve the property of La-Mg-Ni hydrogen storage alloy electrodes,Al powders were doped into the alloy powders,and then La0.7Mg0.3Ni2.5-xCo0.5Alx(x=0-0.3) alloys were prepared by spark plasma sintering(SPS) technique.Microstructure and electrode performance of the alloys were investigated by means of XRD,SEM and e…
The focus of the cam arc several common processing methods,combined with engineering practice,established high-speed processing technology,and improved technology,using side cutter blade finishing Cam,combined with laboratory five-axis machining center of the arc cam machining tests carried out to verify the correctne…
Screening suitable solvent is of importance,since solvent plays an important role in resolution process.Resolution solvent is one of critical conditions for optical resolution by crystallization.Study on both resolution solvent and effect of solvent on resolution of racemate via diastereomeric salt formation is helpfu…
Cracking reasons of the three-way pipe mixing hydrogen and naphtha of continuous catalytic reforming unit were analyzed by macroscopic appearance observation,scanning electronic microscope observation,energy spectrum analysis,determination of electrode potential and galvanic current.The results indicate that the crack…
One demulsifying strain of Alcaligenes sp.S-XJ-1,isolated from the oil-contaminated soil,could grow at initial cultivation pH ranging from 6.0 to 11.0 and the optimum pH was observed at 10.0.Cultivated at initial pH 10.0,the biomass yield reached highest at 4.8 g/L and the emulsion breaking ratio achieved over 85% wit…
Effects of carbon black N330\N660\N990 on curing kinetics of butyl rubber(IIR) were investigated.The re-sults showed that the vulcanizations of IIR filled with various carbon blacks were composed of two stages such as n = 1 order reaction and n≠1 order reaction.When the vulcanization was n = 1 order reaction,the const…