Materials Literature
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L-Histidine,glucose and their admixture have been pyrolyzed under simultaneous conditions usually adopted in pyrolysis and combustion tests of cigarette paper and its additives,and their applications have been evaluated by analyzing their pyrolytic products using PY-GC-MS series and smoke panel test.The results disclo…
Al2O3thin films were prepared by reactive DC magnetron sputtering with pure aluminum target at different O2/Ar ratios.Exciting and Emitting spectra were obtained by using F-4500 fluorometer.Two peaks generated by the color center coming from the oxygen vacancy were observed respectively around 416 nm and 438 nm.With t…
No matter composite laminates is subjected to static or dynamic load,damage is significantly complex.Accurate modeling for fatigue damage can reveal the damage mechanism of composite laminates.In this paper,based on the cumulative damage theory and stiffness reduction model,fatigue damage of the composite was divided…
In this article the theoretical models of LFMR,recent progress and problems on enhanced LFMR in the two-phase perovskite manganese composites at home and abroad are reviewed. The most simple and effective method for enhancing LFMR is adding a second phase to the parent phase. Combining practical needs and the research…
Reducing temperature rise and preventing static welding should be considered for static electrical contact interface of graphite spark gap switch.In this paper,based on contact surface model and heat-conduction equation,computing model of contact temperature rise is proposed.This computing model can prove that materia…
The waste of PMMA/ABS/UPR multilayer plates (WGFRP) which was treated by silane coupling agents,compatibilizer,double-surface organo-modified montmorillonite(OMMT),were used to modify polypropylene by melt compounding. The structure and properties of the composites were studied by thermogravimetric analyzer (TGA) and…
Based on the experimental study of modified Al(OH)3,the effect of such factors as the amount of stearic acid,time and temperature on the modification of Al(OH)3 and the mechanism of modification were discussed.The best modification conditions obtained from the test results are the amount of modifier being 4% of the ma…
SiC/Ti3SiC2 composite ceramics were prepared by high energy ball mill and hot pressing using Ti,Si and C powders as raw materials.The effects of producing process,especially for sintering time and pressure on the phase composition,microstructure and properties of the composites were investigated.The characteristics of…
In order to investigate the Effects of Annealing on the Photoluminescence of Erbium-doped Zinc Oxide Nanocrystalline and Energy transfer from excited states of ZnO hosts to doping Er 3+ ions centers. Er 3+ -doped zinc oxide nanocrystalline powders were successfully prepared by chemical precipitation method at various…
The role of the strong field,the 2-methyl-cyclopentanone ions dissociate into various products,using density functional theory in the UB3LYP/6-31G(D,P) studied by means of 2-methyl cyclopentanone a dissociation channel,find out transition states,intermediates and thus to generate a product of C4H5O ++ C2H5.
The process to prepare a new kind of friend environmental free-cutting P-Ca brass was introduced.The casting ingots of lead-free and free-cutting brass were prepared in a medium frequency induction furnace.Their microstructures,mechanical and cutting properties were studied.The results show that,in order to replace Pb…
Silk fibroin coated CdS quantum dots(SF-CdS QDs) were successfully synthesized in an aqueous system at room temperature under 60Co γ-ray irradiation.The prepared QDs were characterized by transmission electron microscopy(TEM),energy dispersion spectrometry(EDS),Fourier transform infrared spectrometer(FT-IR),X-ray diff…
The surface of U was nitrided byplasma immersion ion implantation and deposition (PII1D),fol-lowed by deposition of Ti/TiN mutilayer films,aiming at impro-ving the wear resistance and corrosion resistance.The morphologyand microstructure of films were analyzed by means of scanning electron microscopy and X-ray diffrac…
The microstructure of X120 ultra-high strength pipeline steel and precipitates during its hot deformation were characterized by optical microscope and electronic microscope.The results showed that the Nb-Ti diphase precipitate forms at 1020℃ in the austenite recrystallization region when the steel is rolled,thus affec…
A novel 3,3′-(biphenyl-4,4′-diacyl)dipentane-2,4-dione-bridged di-nickel(Ⅱ) complex,[Ni2(C22H20O4)(C15H11O2)2]·3H2O(C15H11O2=1,3-diphenylpropane1,3-dione anion;C22H20O4=3,3′-(biphenyl-4,4′-diacyl)dipentane-2,4-dione dianion),was synthesized and characterized by the elemental analysis,conductivity,infrared spectra,elec…
4A-type zeolite was synthesized by the calcination alkaline-hydrothermal synthesis technique using kaolinite as the main raw material and NaOH as the alkali source.By TG-DTA,XRD and SEM,the phase transition process from kaolin to zeolite was explored,and the effects of synthetic conditions on the yield of zeolite are…
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…