Materials Literature
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The effect and the mechanism of phosphorus slag,granulated blast furnace slag and fly ash with different replacement dosage on the durability of sleeper concrete(resistance of freezing-thaw and resistance of chloride permeability) were demonstrated.The results presented that the resistance of chloride permeability of…
Uniform sphere of Y2O3 with average diameter of 160 nm was synthesized via urea precipitation method.The particles are spherical and monodisperse.The growth mechanism of the precursor was analyzed,and the effect of(NH4)2SO4 on the growth habit of the precursor microspheres was studied.The thermodynamic properties were…
Five Cu-Mn complex-oxide catalysts supported on cordierite(COR)monolithic,Cu-Mn-O/Al2O3/COR,Cu-Mn-Ce-O/Al2O3/COR,Cu-Mn-Zr-O/Al2O3/COR,Cu-Mn-La-O/Al2O3/COR,and Cu-Mn-Ce-Zr-O/Al2O3/COR,for the catalytic combustion of lean methane were prepared by wetness impregnation using cordierite as the support.The effect of promote…
Low carbon MgO-C brick containing Al/Si was trial used in 210 t steel ladle for refining quality steel and satisfactory service results were obtained.Phase composition and microstructure of the brick after use were analysed by means of XRD,SEM and EDS.The results show that the structure of the brick after use can be d…
Gd2O3 and Y2O3 co-doped CeO2-based solid oxide fuel cells(SOFC) electrolyte materials(CeO2)0.92(Y2O3)0.08-x(Gd2O3)x(x=0,0.02,0.04,0.06,0.08,mole fraction,the same below) were prepared by the solid reaction method and sintered at 1 600 ℃.Crystal structure,thermal expansion and ionic conductivity were characterized by t…
The effect of hydrogenation on structure and properties of TC4 alloy sintered body was researched by means of the room-temperature die forming and sintering in protection air using hydrogenated powder.A new progress for preparation of Ti alloy parts the by the combination of hydrogenation titanium alloy powder forming…
We hydrothermally synthesized sheet-like crystals of zeolite Y at high temperature (140 °C) using methyltriethoxysilane (MTS) as an additivity. Compared with the zeolite Y synthesized at 100 °C, the zeolite Y synthesized at high temperature has a high Si/Al ratio, a large crystalline width/thickness ratio and has good…
The traditional and modern preparation technologes of magnesium matrix composite were summarized.The advantages and disadvantages of various fabrication methods and research conditions were described.Some opinions and outlook of the modern fabrication methods for the composite were put forward.
Characteristics of cementite deformation in a submicrometer grained steel by warm ECAP was investigated by means of scanning electron microscopy(SEM) and transmission electron microscopy(TEM) technique.The results show that the deformation modes of cementite lamellae in steel include bending deformation,shearing defor…
Cr,GLC(graphite-like-carbon) and CrTiAlN nanoscaled coatings are deposited by using magnetron sputtering on 45 steel and 40Cr steel of different yield-strength ratios.The influence of the coatings on the ability of elastic deformation of metal matrix is investigated by measuring the changes of elastic modulus and yiel…
Mesoporous molecular sieve was hydrothermally synthesized using kaolin and sodium silicate as silicon sources.The sam-ples obtained were characterized by X-ray diffraction,Fourier transform infrared spectroscopy,thermal gravimetric?differential scan-ning calorimeter,N2 physical adsorption,scanning electron microscopy(…
Using ultra-fine graphite powders and hexagonal structural BN powders as raw materials and SC coal pitch as a binder,graphite blocks doped with BN powders were prepared by a hot-pressing method.The influence of BN doping content on the oxidative weight loss of doped-graphite at 600℃,900℃ and 1000℃ was investigated.The…
Fiber reinforced plastic(FRP) rubber isolator is made by replacing the steel reinforcing elements of multilayer elastomeric isolation bearings by fiber reinforcement.Former experimental and theoretical researches have shown that FRP rubber isolator has equivalent performance in shear deformation capacity and vertical…
To discuss the carrying capacity, life, transmission quality, manufacturing costs of finishing scraping the carburized hardened dou ble-arc gears , based on the contactfatigue,load performance and other aspects in comparative test,comparing the shaved hardened double-cir cular-arc gear and hardened surface involute ge…
Physics constant of 1Cr11MoNiW1VNbN stainless steel is mensurated by a great deal experimentation research.Mechanical properties and microstructure of this material is researched.The best heat treatment technic is ascertained.
Compact and well-adhesive copper and tin coatings were electroplated on aluminum foils,which were treated previously by plasma cleaning and magnetron sputtering of a mid-layer Ni–Cu alloy coating. The effects of the voltage during plasma cleaning,the negative bias voltage in magnetron sputtering,and the composition of…
Zinc borate is an inorganic flam retardant with environmental protection function.Its characteristics are good-stability,low-toxicity and no-smoke.This article summarizes the main property,the inflaming retarding mechanism of zinc borate and the preparing processes of zinc borate nanoparticles.The preparation of zinc…
Black Ni-Cu-P coating was prepared on steel surface by electroless plating.The effect of blackening agent on coating surface colorand factors affecting coating performance were studied.The optimal parameter was as follows: 28g/L NiSO4.6H2O,30g/L NaH2PO2.H2O,15g/L Na3C6H5O7.H2O,1g/L CuSO4·5H2O,8g/L KCNS,15g/L CH3COONa,…
In order to analyze the effect of geometric parameters on the structural integrity of wheel-shaped grain,and provide reference for the design of solid motor grain configuration,the parameterized model is constructed on the basis of finite element software MSC.Patran/Nastran.The maximum Von Mises strain variation with…
Differential scanning calorimetry(DSC) analysis was used to systematically study the effect of different concentrations of Na+,Ca2+ and H+ on the thermal denaturation temperatures of type I and type II collagens from whale sharp skin.The type I collagen had maximum absorption at 233.05 nm and the type II collagen at 2…