Materials Literature
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Sigma phase as intermetallic compound with Cr and Mo will increase the strength of steel and make the plastic,toughness and corrosion resistance worse.The precipitation of sigma phase in S31803 and S32750 duplex stainless steel is studied through composition,microstructure,properties and other aspects of in this paper…
This paper introduces the design parameters of the passive residual heat removal heat exchanger for American advanced passive pressurized water reactor(AP1000),describes the fabrication process for the head,tubesheet,heat exchange tube,corrugated plate and support frame assembly of the heat exchanger,mainly in terms o…
Four N-(2,4-dinitrophenyl)-N'-(substituted-phenyl)hydrazones(substituent R=H,o-OCH3,o-Cl and o-OH) were synthesized as absorption spectral chemosensors for receptors.The binding properties of these receptors with anions such as F-and AcO-in CH3CN were investigated by UV-visible absorption spectroscopy.Results showed t…
Aluminum titanate ceramics with both moderate high strength and low thermal expansion were prepared by using Mg-doped aluminum titanate solid solution powders as raw material and potassium feldspar as sintering additives.The effects of po-tassium feldspar additives on the sintering behavior,microstructure,mechanical p…
TA2/316L welded joint was heat-treated at 350-900 ℃ for 30-120 min in vacuum.The interface morphology and microstructure of the welded joint before and after heat treatment were examined by SEM and EDS.The interface reactions during heat treatment and thermodynamics and dynamics of the reactions were investigated.It i…
Pressure vessel is the critical and unchangeable component of the PWR during its service lifetime,which determines the lifetime of nuclear power plant.The property decline of pressure vessel is mainly caused by large dose and high energy neutron irradiation during the long term service.Irradiation can reduce the tough…
Muti-walled carbon nanotubes were prepared on Si substrates with Ni as catalyst by plasma enhanced chemical capor deposition technology using C2H2,H2 and N2 as reactive gas.The effect of depositing temperature on the structure of carbon nanotubes and growth mechanisms were deeply analyzed by SEM.The results indicated…
F-/Sr2+ mono-doped and co-doped ceria samples were synthesized by precipitation.The UV-shielding and oxidation catalytic properties of the doped ceria were investigated.The X-ray diffraction revealed that the prepared F-/Sr2+ mono-doped and co-doped ceria samples belonged to the cubic fluorite structure although the p…
Dynamics of a pair of voids located along loading direction under uniaxial tension is investigated using molecular dynamics method.Size effects in void growth and coalescence are studied.It shows that different-sized voids grow and coalesce through dislocation nucleating on void surfaces.In early elastic stage,voids g…
The effect of acrylic redispersible polymer powder on waterproofing mortar was evaluated from mechanical properties,flexibility,impermeability,and water absorption ratio.The performance of EVA redispersible polymer powder in waterproofing mortar was also compared.The results showed the water absorption ratio in 48 h w…
Docynia longiunguis Q.Luo et J.L.Liu,a new species of Docynia Dcne.from Xichang City,Sichuan,China,was described in this paper.The new species appears to be similar to Docynia indica(Will.) Dcne.and Docynia delavayi(Franch.) Schneid.,but differs by having bigger flowers,3.5-4cm in diameter,petals 20-25mm long and 12-1…
Stretching orientation and strain-induced crystallization of rubber is widely recognized to play key role in the self-reinforcement of natural rubber and some synthetic rubbers(such as chloroprene rubber,butyl rubber and hydrogenated nitrile-butadiene rubber).Therefore,studying these phenomena and behavior has substan…
The risk assessment of thermal behavior and runaway reaction cased by an exothermic batch process in manufacture of the vinyl acetate resin are described in the present paper. The aim of the study was to evaluate the risk of runaway reaction with operating parameters such as a reaction inhibitor, reaction temperature…
The effects of frequency and duty ratio on the thickness,morphology and corrosion resistance of the micro-arc oxidation coatings were investigated by using eddy current thickness measuring gauge,scanning electron microscopy,energy dispersive spectrometer and electrochemical workstation.The thickness of MAO coatings is…
Statics characteristic is one of the most important application-related properties of the giant magnetostrictive thin films(GMF),and the accurate analysis about it is the base of the application of GMF.Neutral axes and equivalent inertia moments of bi-layer cantilever beams coated with GMF of different sizes and subst…
Due to its high capacity,silicon based anode materials have been widely studied in recent years.The insertion/interinsertion lithium-ion principle of silicon anode for lithium-ion battery is mainly analyzed,the latest alleviation methods of cracking and crushing of the silicon are reviewed,and the shortcoming of these…
Diamond film is an ideal semiconductor material due to its excellent properties,such as high thermal conductivity,wide band gap,high dielectric breakdown field and good carrier mobility.This paper describes the advantages of the doped diamond films as the working layer in semiconductor devices,and presents a comprehen…
The precipitation kinetics in a low carbon high strength low alloy (HSLA) steel,microalloyed with V+Nb has been studied by using the stress relaxation method.This technique was carried out in a dynamic dilatometer and allows to determine the onset and finishing precipitation times in hot deformed austenite.The evoluti…
The interfacial displacement instability in the TBC system is considered as a key factor that causes the overall TBC system failure upon thermal oxidation loading cycles.Based upon ABAQUS software together with its subroutine,UEXPAN and USDFLD,a finite element analysis of interface displacement instability was perform…
The short-term(5 min) oxidation behavior of 2507 super duplex stainless steel in oxidizing atmosphere A and B at 1200 ℃ under the condition of simulated hot-rolling was studied.Meanwhile,the composition and structure of the oxide scales were characterized by SEM,GDS,XRD and XPS.The results show that both the two oxide…