Materials Literature
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Single Al-Ni-Co decagonal quasicrystal particles were prepared by the combination use of conventional casting and ball milling.The coated Al-Ni-Co quasicrystalline particles were prepared by sol-gel processing.The microstructures,morphologies and interfacial characteristics of dry gel and the coated Al-Ni-Co quasicrys…
Fe-6.5wt%Si alloy has excellent soft magnetic properties,but it is hard to be cold rolled due to appearance of ordered phases in this alloy.It′s reported that ultra thin sheet of 0.05 mm thick could be obtained by hot,warm,and cold rolling method,including heat treatment.The heavily cold rolled sheets were heat treate…
On the basis of theoretical analysis,the reaction mechanism of FeO and V2O5 is studied by differential scanning calorimetry(DSC),high-temperature quenching and X-ray diffraction analysis(XRD).The experiment results indicate that V2O5 is broken down into V2O3 and oxygen,FeO is oxidized to Fe2O3,V2O3 reacts with FeO to…
The microstructure and mechanical properties of hot-rolled fine C-Mn-Si and C-Mn-Al-Si multiphase steels were investigated by hot compression tests on a simulation test machine.The results show that the microstructure consisted of a ferrite matrix with a mixture of bainite,retained austenite and pearlite is obtained i…
Sm 0.5Sr0.5CoO3(SSC) and Sm0.2Ce0.8O1.9(SDC) were prepared with Sr(NO3)2,Co(NO3)2·6H2O and Sm(NO3)3·6H2O,Ce(NO3)3·6H2O as raw materials by a glycine-nitrates process(GNP) and a solid reaction method.Spin-coating was used to prepare the SSC and the SDC composite cathodes lays on the Al2O3 substrate.The composition and…
Abstract : Lysozyme-templated precipitation of silica synthesized by sol-gel chemistry produces a composite material with antimicrobial properties. This study investigates the structural properties of the composite material that allow for retention of the antimicrobial activity of lysozyme. Scanning (SEM) and transmis…
Grain refining plays a decisive role in the microstructure and properties of magnesium alloys.Doping with different components of calcium and carbon was respectively researched in refining the grain of magnisum alloy AZ91D.Tensile samples of alloy AZ91D was prepared under flux cover,and after T4,T6 heattreatment,micro…
In order to popularize the use of bulk curing barn refited by ordinary curing barn,the suitable loading density was explored.The results showed that the curing cost could be reduced,the appearance quality of tobacco leaves could be improved,the proportion of first and medium class of flue-cured tobacco could be increa…
The influence factors on strength during the twisting and weaving process of PET cord yarn were analyesd.The results showed that grey yarn strength,CV value,the equipment components contact with the twisting and the control of twisting process parameters had obvious effect on cord yarn strength.The cord yarn weaving p…
The study progress of graft copolymerization of cellulose was overviewed.The heterogeneous graft copolymerization and homogeneous graft copolymerization,emphatically living/controlled free radical copolymerization developed in recent years were introduced.
As an engineering material, polyimides(PI) have been extensively applied in many areas such as microelectrics, electric industries and aerospace etc. In this paper, some polyimide/sailica-alumina hybrid films were fabricated using silicon and aluminum sols obtained by sol-gel method. The microstructure, mechanical pro…
We performed first-principles calculations to the phase stability,ealstc properties and electronic structure of CaNi2 and CaMgNi4.The calculated results show that CaMgNi4 has the higher stability than CaNi2,duing to the relaxation of the stresses between atoms.The calculated bulk modulis show that CaMgNi4 has the larg…
Research is conducted on the fracture behaviors of rare earth La2O3-doped Mo plate.The results show that the fracture is originated from the grain inside.In the process of the crack growth,the second phase of rare earth grain plays a vital role in delaying crack growth.
A calibration method for deposition rates of multilayer coatings by sputtering depositions was proposed to eliminate the random thickness errors and to realize the accurate control of film thicknesses.In this method,the deposition rates were acquired by the least square fitting for results of different deposition expe…
In order to study the fracture performance of HTPB propellant specimen with crack,the relaxation experiment and the J-integral experiment of propellant specimen with Ι mode crack were carried out.The relaxation modulus of HTPB propellant was fitted.The value of crack initiation point J-integral of propellant specimen…
The preparation and technical performance of compisite pouder for titania slag is discussed,and the apply of compisite pouder for titania slag in cement and concrete is experimental studied.The results show that:compisite pouder for titania slag can be used in cement as activity mixed materials and in concrete as acti…
Organic modification of clay is the key process in preparation of polymer-clay nanocomposites (PCN). This paper reviewed the recent research progress and development in this field. Firstly,we presented the effect of different ammonium salts and multi-functional initiators,as well as functional intercalating agents as…
Acidithiobacillus thiooxidans QH-1 was isolated and purified from sludge which was collected from the Qinghe River in Beijing.A preliminary study of the strain's tolerance to several heavy metal ions was made.QH-1 was a Gram-negative,short rod,facultative aerobe.The strain could oxidize reduced sulfur compounds to obt…
In this article are tested the temperature - regulating indexes of Outlast acrylic fiber with fiber's morphology and mechanical performances and stretch of its blended yarn with cotton after tested and not tested at different temperature observed and studied.The result shows that Outlast acrylic fibers is of temperatu…
The process of zinc electrodeposition cathode reaction from zinc chloride-1-ethyl-3-methylimidazolium chloride molten salt containing glycol is investigated,the mechanism of zinc nucleation is analyzed by i ～ t curve,and the effects of glycol on the zinc coating are discussed.The results indicate that the onset reduct…