Materials Literature
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Billets of Al-12Zn-2.4Mg-1.1Cu-0.20Zr-0.30Sc-0.30Ni alloys were fabricated by spray deposition (the Osprey process),and the effects of heat treatment at different temperatures on the microstructural evolution were investigated by DSC,XRD,SEM,and TEM.The results show that many η-phase particles disperse in the as-depos…
Fe-Ni based high temperature wear-resistant powder was cladded on 45# round steel to obtain an Fe-Ni based alloy roller by plasma cladding.Scanning electric microscope,energy spectrometer and X-ray diffractometer were adopted to study the microstructure of the Fe-Ni based alloy coating and the failure surface of the F…
A technique for testing dielectric permittivity and loss of sample was presented based on parallelplates-open-type method.Measurement error of apparatus was considered,the error theory of dielectric parameters was investigated with interrelated uncertainty.Through the experimental result analysis,one can find the more…
Polyethy leneglycol-mesoporous silica was synthesized successfully using impregnation method.The samples were characterized by XRD,N2 ab-desorption,SEM、infrared spectroscopy(FTIR),DSC-TG. The results of XRD demonstrated that polyethy leneglycol-Mesoporous silica composites kept mesostructure. The results of SEM showed…
Objective To prepare the homogeneous particles and uniformly distributed colloidal gold nanoparticles with sodium citrate as reducing agent.Methods The optimum preparation conditions were screened by changing the reaction time,stirring speed and initial boiling time,and UV spectrophotometer,particle size distribution…
Ceramic coating based on MgO was prepared on the surface of industrial pure magnesium and MB2 by thermochemical reaction method. The results show that corrosion resistance of the surface increases by 28～30 times in 5% hydrochloric acid soak, while the wear resistance increases by more than 3 times in the abrasive wear…
Hox genes play an important role in the mechanism of developmental regulation of insect body plan and the expression of Hox genes shows strict tissue specificity and the programming of embryonic development.The silkworm,Bombyx mori,is a good representative insect of the order Lepidoptera.The Hox genes have been identi…
The glass-based oxidation resistance coatings on Mo substrate were prepared by slurry method. The morphology, microstructure and mass loss of the coatings were studied by means of SEM, XRD analysis and the test of oxidation resistance property. The influences of presintering craft on the oxidation resistant properties…
Bi2Te3 and its alloys are the best thermoelectric material at room temperature and have been used in many practical applications due to its good thermoelectric performance.Nanostructured materials such as Bi2Te3 nanofilms have attracted considerable attention.The researchers are concerned about its mechanical performa…
The application and surface modification of nano-CaCO3 are introduced briefly,research status and application are summarized on paper industry,development trend are discussed also.
The Ni-Cu-P coating was prepared on cemented carbide substrate by electroless plating.The influence of deposition parameters such as bath composition,pH and temperature on the plating rate and properties of the Ni-Cu-P coating was studied.The plating rate was measured by weighing the sample.The bond strength of the Ni…
60Co γ-rays irradiation method was applied to prepare nano-particle copper in aqueous solution. The nano-particles with different sizes were prepared by use of irradiation with different absorbed doses. The samples were analyzed with X-rays powder diffraction (XRD),electron microscopy (TEM) and laser scattering partic…
The N-Fe co-doped TiO2 catalysts were prepared by sol-gel method.The catalyst was characterized by XPS and DRS.Acetone steams are used as photocatalytic substrate,photocatalytic elimination reactions are examined.The catalyst activity of degradation of acetone were measured under visible light and UV irradiation over…
The phase behavior and solubilization of the microemulsion formed by sodium dodecyl sulfonate(sodium dodecyl sulfate,sodium dodecyl benzene sulfonate)/alcohol/ alkane/brine have been studied with e-β-fishlike phase diagram at 40 ℃.The composition of the hydrophile-lipophile balanced interfacial layer is determined.The…
The passive behavior and electrochemical characterization of passive film formed under different potential on X70 pipeline steel in NaHCO_3 solution were discussed by potentiodynamic polarization,electrochemical impedance spectroscopy(EIS)and capacitance measurements.It is shown that the X70 pipeline steel has a wide…
Low-pressure rotor is a key component of pressurized-water reactor(PWR).Flat anvil and method free from Mannesmann effect(FM) are commonly used in chamfering process of forging nuclear turbine low-pressure rotor.It causes the strain of billet to concentrate on surface areas and wastes the heavy reduction of chamfering…
The research in this paper focuses on establishing an accurate displacement model for giant magnetostrictive actuators(GMA)that may be istalled in a very large telescope to drive its segmented mirrors.A hierarchical genetic algorithm(HGA)is proposed and employed to identify the parameters for effectively deploying the…
Fine-pitch precision cylindrical worm of cone envelope (ZK worm) is a nonlinear spiral surface worm. The traditional method of machining technology is lathe. It is difficult to guarantee the precisions of ZK worm. At present,the milling method is increasingly adopted. Aiming at the characters of ZK worm,the errors of…
The origin of metallic impurities such as iron,copper and lead in chloride zinc plating bath and their effects on deposit were described.The removal method is as follows.First,oxidation with industrial-grade potassium permanganate;second,reduction with fine high-purity zinc powder;third,precipitation and filtration.Af…
This paper reviewed the research progress on fungal durability of wood-plastic composites,mainly introduced the harm of fungi(included the degradation of rot fungi and stocking of mould)and the main factors affected the fungal durability of WPC,then discussed the methods that can enhance the fungal durability of WPC.T…