Materials Literature
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Taking DCP as the initiator,the reaction rule of different kinds of POE grafted and crosslinked with vinyl triethoxysilane in HAAKE torque rheometer was studied,the results showed that:vinyl triethoxysilane connected with the molecular chain of POE by chemical bond.The kind of POE influenced the torque and the reactio…
This manuscript reported the acylation of cyclohexanol with acetic anhydride catalyzed by Y-β composite zeolite supported phosphotungstic acid(H 3 PW 12 O 40/Y-β).The effect of different factors such as the amount of catalyst,the ratio of cyclohexanol to acetic anhydride and reaction time on the yield of cyclohexyl ac…
To improve the adsorption performance of activated carbon(AC) for denitrogenation of liquid hydrocarbon fuels,a commercial AC was modified in this present study using concentrated H2SO4,saturated(NH4)2S2O8 solution and mixture of the two oxidants,respectively.It was seen that,as the specific surface area(micropore vol…
The effect of carbon nanotubes(CNTs) addition on the electrochemical performance of Al-substituted α-nickel hydroxide is studied at high temperature.This CNTs doped Al-substituted α-nickel hydroxide is used as electrochemical active material in the positive electrodes of rechargeable alkaline batteries.The results sho…
Through analyzing the oxidation characteristics of SPA-H steel and testing the heating process of SPA-H slab,the main factors affecting the oxidation loss of SPA-H steel are disclosed,as well as some effective means to reduce surface oxidation are put forward.
Using the Deutschman CH4/air/Pt surface reaction mechanism and GRI3.0 gas phase reaction mechanism,combustion of CH4/air premixed gases in a porous medium burner with Pt catalyst was numerically studied based on the volume averaged two-temperature model.Compared with the results of the inert porous medium burner,it is…
In order to meet the demands for rapid forming functional parts with wear resistance,the low carbon Nb-Ti-V alloyed metal cored wires were developed to act as the forming materials.The surfacing metal samples were prepared by welding rapid forming technology based on gas metal arc welding.The microstructure and proper…
LaCrO3-based interconnect material for solid oxide fuel cells(SOFCs) is poorly sinterable in air and has relatively low electrical conductivity at intermediate temperatures.In this work,fine precursor powders of La0.7Ca0.3CrO3-δ were prepared by introducing an auto-ignition process,and then sintering in air at 1 400℃…
The finish forging die for gear,made of 012AI steel,failed early in service.Macroscopic and metallographic examinations and hardness test were performed to reveal the causes of die failure.The results show that premature failure of the die arises mainly from more shallow and britller ion-nitrided case and such delects…
PET-MCA composites(PET-MCA) and phosphorus-contanining poly(ethylene terephthalate)(CP-PET)-MCA composites(CP-PET-MCA) were synthesized from melamine cyanurate(MCA) and poly(ethylene terephthalate)(PET) and MCA and CP-PET,respectively.The thermal stability,flame retardancy and char forming characteristics of the produ…
Using model sticky substances consisted of the components of wood extractives and synthetic polymers,the effects of metal ions,cationic polymers and mineral fillers on the physicochemical properties and depositional behavior of sticky substances were investigated.Results showed that introducing Al3+ into the system,ev…
The evolution of structure morphology of polyethylene(PE)/ground tire rubber(GTR) blends at different thermal shear processing conditions and its effects on the mechanical properties,rheological properties and swelling behavior of the blends were studied.The results showed that there would be a lot of small particles(…
Columnar crystal structure of TC18 titanium alloy was obtained by electron beam deposition method.Tensile properties and microstructure of the differently heat-treated TC18 alloy with columnar structure was investigated.The results show that both tensile and yield strength of the alloy in direction parallel to the len…
Nano-polypyrrole(PPy) were prepared on glassy carbon(GC) electrodes by electrodeposited method.The morphology of the PPy was obtained by scanning electron microscopy(SEM).The GOD/PPy/GC electrode was prepared by immobilization glucose oxidase(GOD) on the PPy.The electrocatalytic properties of GOD/PPy/GC electrode were…
The influences of different antistatic agent,corona discharge power,and treating technology on wetting tension of three-layer casting polypropylene(CPP) films were studied.When antistatic agent ASPA 2446 OB DC was introduced,the CPP film treated with two station corona could preserve a wetting tension over 38 mN/m aft…
The MoSi2–recrystallized SiC(RSiC) composites were obtained in the mixed powders of SiC and MoSi2 by pressing forming and pressureless firing.The scanning electron microscope,X-ray diffraction and isothermal oxidation method were used to study the oxidation resistance and mechanism of the composite at elevated tempera…
The effect of heat leveling treatment on corrosion rate of the titanium matrix composite in oxalic acid solution was investigated.The result shows that the titanium matrix composite without heat leveling treatment can be dissolved at a constant rate of 0.474 g/(m2·min) in oxalic solution,but the corrosion process of t…
The tensile tests were conducted at room temperature using material test machine.The sensitivity of flow strength to strain rate was researched at strain rates of 0.001,0.1,0.6s-1 for Mg3Al1Zn2Y,Mg3Al2Zn2Y and Mg3Al6Zn2Y.The sensitivity sequence of flow strength is Mg3Al2Zn2YMg3Al1Zn2YMg3Al6Zn2Y.The rupture characteri…
Using tetraethylorthosilicate(TEOS),tetrabutyltitanate(TBT) and γ-methacryloxypropyltrimeth-oxysilane(KH570) as precursors,SiO2,TiO2 and mixture of SiO2-TiO2modified sol-gel coatings were prepared and applied to surfaces of No.45 steel plate.Morphology or microstructure and binding of coatings were examined by scannin…
La2/3Ca1/3MnO3∶Ag0.4(LCMO∶Ag0.4) and La2/3Ba1/3MnO3∶Ag0.4(LBMO∶Ag0.4) composite was prepared successfully by co-precipitation method.The microstructure and performance of La2/3Ca1/3MnO3 ∶Ag0.4 and La2/3Ba1/3MnO3 ∶Ag0.4 were investigated by X-ray diffraction and R-T measurement.The results show that,the metal-insulatio…