Materials Literature
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High strength tungsten alloys with different deformation of 20%, 40%, 50% and 60% were prepared by swaging, and the impact strength and impact fracture morphologies were tested and observed respectively by Charpy tester and SEM to study the influence of deformation degree on fracture behavior. The results show that wi…
Vinyl-cyclosilane and styrene were introduced to harden the polysiloxane via radical crosslinking ensuring the independency of the particles and the generation of the micro-channels. After the emulsion had been prepared, when the shape of emulsion particles became stable, the room temperature vulcanization crosslinker…
The adsorption capacity of two kinds of Ion exchange fiber (IEF) was compared to treat the wastewater contained CNT and Cu, then adsorption efficiency of Poly Acrylo-amidino Triethylene tetramine Fiber (PATAF) was studied under different pH (7.5-9.0) and flow rate (80.4-160.8 BV⋅h-1). The concentration of cyanide and…
Perovskite Ba0.7Sr0.3TiO3 nanocubes with a hollow structure were prepared by molten hydrated salt method at 180 °C for 15 h, using Ba (OH)2·8H2O, Sr (OH)2·8H2O and anatase-TiO2 as raw materials without any additive or template. The phase composition, morphology and microstructure of the products were characterized by…
A new bi-capped Keggin heteropoly molybdovanadated derivative, [Co (en)3]2[SiMo8V6O42]∙6H2O (1) (en = ethylendiamine) has been hydrothermally synthesized and structurally characterized by the elemental analysis, IR, XPS and single crystal X-ray diffraction. The crystal structure analysis reveals that compound 1 consis…
Accelerate the corrosion of the nanometer organic coating by design salt spray test. Research the corrosion resistance of the nanometer organic coating in grotto environment by EIS. The results show that prolong time of the salt spray test, the coating surface become to coarseness, the colour occur slight change, but…
The fundamental principle of three dimensional Element-free Galerkin has been briefly investigated in this paper, and built forming mode of steel ball cold forging, Element-free Galerkin method successfully applied to the simulation analysis of steel ball cold forging forming process in the LS-DYNA simulation software…
The thermal problems of high power LEDs could be solved effectively and the stability of the device could be also improved, employing metal substrates for high power LEDs. In this paper,high power GaN based blue LEDs on metal substrates were successfully prepared by transferring GaN-based LED epitaxial film on Si (111…
A hot rolling method to produce Mg-Gd-Y-Nd-Zr alloy bars through oval-vertical elliptical-round pass system is put forward. The mechanical model of Mg-Gd-Y-Nd-Zr alloy has been established. Using Deform-3D software, the rolling process of Mg-Gd-Y-Nd-Zr alloy bar is simulated at rolling temperature 450°C, rolling speed…
AP1000 nuclear power main pipe, a type of complicated thick-walled tube structure with both high and thick-walled nozzles, is one of the key parts in nuclear island. It is required to be manufactured by integral plastic forming technique. Up to now, no economical and efficient plastic forming process for AP1000 main p…
Recently, wear and corrosion of the engine parts surrounded with combustion chamber is more serious compared to the other parts of the engine due to using of heavy oil of low quality. Therefore, an optimum repair welding for these parts is very important to prolong their lifetime in a economical point of view. In this…
In this paper, β''-alumina powders were prepared by solid-state synthesis method with different kinds of sodium compounds such as sodium carbonate, sodium bicarbonate, sodium oxalate, sodium acetate and sodium citrate. Each sodium compound was mixed with α-alumina by ball-milling, and then dried and calcined in muffle…
Silicon solar cell surface texture is effective to reduce reflectance and improve light collection. Alkaline etchants is a conventional process of monocrystalline silicon texturing. Isopropyl alcohol (IPA) as buffer solution is expensive and high consumption, which increased the cost of solar cell. In reserch, It has…
The role of pores structure in porous titanium with helical pores was studied. The results showed that porosity of porous titanium depends on diameter of titanium fiber (d1), screw diameter (d2) and screw pitch (d3). With the increase of titanium fiber diameter, the decrease of screw diameter and screw pitch, the poro…
This is the first treatment of surface states in a-Si, Ge originating from a homopolar amorphous surface. We address the effects of nearest neighbour unsaturated bonds, multiple unsaturated bonds per surface atom, and back bonds on the density of surface states (DOSS). In particular, the results here predict a shift o…
The process of zinc immersion for Mg-Li alloy is researched in this paper. Through orthogonal experiments, the optimum process parameters are obtained. The microstructure and the composition of the Zn-dipped coating were measured with SEM, XRD, EDS and electrochemical testing. Results show that, the optimum process pa…
The growing necessity of biomaterials has increased the interest in calcium phosphates, particularly hydroxyapatite. In this paper, monodisperse and spherical SiO2 particles have been coated with Ca10(PO4)6(OH)2:Eu3+ layers via a Pechini sol-gel process, resulting in core-chell ctructured SiO2/Ca10(PO4)6(OH)2:Eu3+ sam…
Thermal and thermo-oxidative degradation of epoxidized natural rubber containing 25 mol % expoxidation (ENR25) with different four antioxidants were investigated by thermogravimetric analysis (TGA). The four antioxidants, viz., poly-2,2,4-trimethyl-1,2-dihydroqui- noline (RD), N-(1,3-dimethylbutyl)-N'-phenyl-p-phenyle…
Microphases and triangle phase diagrams of cyclic ABCB tetrablock copolymer melts have been investigated by a combinatorial screening algorithm based on self-consistent field theory (SCFT) in two-dimensional space. Eight main stable ordered morphologies have been observed in the intermediate-segregation regime. SCFT s…
Circularly polarized optical excitation is used to demonstrate the efficient injection of spin-polarized excitons to individual self-assembled CdSe quantum dots in ZnSe barrier. The exciton spin-transfer is studied by means of polarization-resolved single dot spectroscopy performed in magnetic field applied in Faraday…