Materials Literature
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Effect of oxide impurities( alkali metals,alkaline earth metals oxides and SiO2) on mechanical properties and creep resistance of Al2O3 was investigated by pressless sintering process. The microstructure and mechanical properties of the samples were characterized by scanning electron microscope and universal testing m…
The W/CuCrZr alloy divertor component module was manufactured by hot isostatic pressing(HIP) technique. The interface properties of three modules which have the interlayers with 40 μm thick Cu coating produced by PVD method,2 mm thick TU1 Cu sheet and no interlayer,respectively,were investigated. The microstructure,we…
Molecular sieve absorbent is one kind of key material employed in the SF6 gas insulated electrical equipments. The ex-service molecular sieve absorbents from SF6 gas insulated electrical equipments contain SF6-degradation products. These SF6-decomposition products are poisonous, and also lead to environment pollution.…
The AerMet100ultra-high steel was cryogenic treated after quenched and then was tempered under different temperatures,the OM,SEM and TEM techniques were used to observe the microstructure after heat treatment.The effect of different heat treatments on the dynamic mechanical properties was investigated using the split…
Objective To prepare the polypyrrole film on the copper surface and study its corrosion resistance in 3. 5% Na Cl solution. Methods Polypyrrole films were electrodeposited on the copper surface using potentiostatic,galvanostatic and cyclic voltammetry electrochemical techniques. Scanning electron microscope was used t…
The experiment on simultaneous removal of NOx and SO2 from glass furnace flue gas by ozone oxidation and spray tow er was carried out. The experimental results show that the concentration of the sodium hydroxide as the spray solution has less effect on NOxremoval efficiency when pH is above 10,but SO2 in the flue gas…
To study the influence rules of the critical initiation speeds that the projectiles impact initiation shelled explosive with different materials and L / D ratios,so as to offer data reference for the armament design of projectiles,by using LS- DYNA software and the Lee- Tarver ignition and growth model,the numerical s…
The gas pressure is usually increased so as to improve the electric strength of SF6 gas mixtures in gas insulated switchgear(GIS) and gas insulated transmission line(GIL), leading to the increase of the dew temperature. As the dew temperature of gas mixtures increases, the liquefaction characteristics may be beyond th…
To increase productivity and improve joint property,8 ram thick high-strength low-alloy structural steel of Q690 C supplied in TMCP condition was welded with 3 pass metal active gas(MAG) welding at low heat input(10 kJ/cm) using equal-matched welding wire without preheating.The joint macrostructure,microstructure and…
A series of Ti-Al-Si-Ox deNOx catalyst carriers were prepared by extrusion method and tested for selective catalytic reduction (SCR) of NO with NH3. The Ti-Al-Si-Ox formulas were designed and optimized by orthogonal ex- periments, and the specific surface area, pore volume and size distributions, micro-morphology and…
Streszczenie: Nanocebulki węglowe (Carbon Nano-Onions -CNOs) zbudowane są z zamkniętych sferycznie monowarstw węglowych skupionych wokół pustego rdzenia -fulerenu C 60 .Dotychczasowe badania dowiodły, iż CNOs wykazują lepsze właściwości niż pozostałe struktury węglowe.Duży stosunek powierzchni do objętości, niska gęst…
In this paper,on basis of the introduction of common methods for sepiolite modification,such as acid-modification,heat-modification,acid / heat-modification,magnetic-modification and organic-modification,it was pointed out that the modified sepiolite had obvious advantages in improving specific surface area and adsorp…
Heterogeneous nucleation of small wetting angle under pulsed magnetic field( PMF) was theoretically analyzed on the basis of the Ma nucleation model,with the solidification uncleation model established. The effects of magnetic induction intensity of PMF on the critical nucleation radius and critical undercooling were…
Cu-Mn-Ce(CMC) ternary mixed oxides were prepared by the co-precipitation method with different precipitants, and evaluated in catalytic combustion of toluene. The catalyst prepared with Na OH(CMC-Na OH)exhibited the highest catalytic activity, followed by the catalyst prepared with NH3?H2O, K2CO3, and Na2C2O4. The pre…
Empirical formulas of residual strength of corroded pipeline were introduced according to four standards,ASME B31G-2009,BS 7910-2005,PCORRC and API 579-1/AMSE FFS-1-2007,and the effects of four evaluation criteria on predicted results were analyzed and compared.The residual life of some gathering pipeline was predicte…
Relative to conventional petrochemical polyamide fiber, bio-based polyamide fiber is processed and obtained by a biological method such as castor oil cracking or glucose fermentation,and is green and environmental friendly. Bio-based polyamide fiber has excellent properties such as high strength,wear resistance and mo…
Fe3O4 nanoparticles have been widely concerned and researched due to their special physicochemical properties and application in many fields. In this paper, preparation methods of Fe3O4 nanoparticles at home and abroad were introduced. The basic principles and application of ball milling method, precipitation method,…
Solution-processable solar cells with high power conversion efficiency( PCE) are always the focus of studies all over the world. Because of the excellent light harvest and charge transport capability,solution-processable organic-inorganic hybrid perovskites and their application in solar cells have attracted most of t…
Partial discharge is the main source generating surface charge on insulators. In order to study the dynamic process of surface charge accumulation on composite insulators, we have developed a PIC/MCC method that combines the particle-in-cell method(PIC method) and the Monte Carlo collision model(MCC model) to track th…
To further understand the considerable potential of rare earth elements(RE)for improving performance on alloy surface,widen the applications of rare earth to chemical heat treatment,the development application status of rare earth elements(RE)in chemical heat treatment process is introduced,with particular attention t…