Materials Literature
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The present paper pointed out the importance of roll as the large scale tool in reducing the cost in steel rolling of the rolling mill and briefly analyzed the mechanical principle of the heat stress roll breakage and pointed that this phenomenon occurred in the production in the Mill and pointed out the effect of the…
La1-xCaxCo0.8Ni0.2O3(x=0.1～0.5)catalysts were synthesized by sol-freezing drying method.The crystal structure,surface area and micrograph of the catalysts were analyzed using XRD,BET and SEM,respectively.The results indicate that single-phased perovskite-type La1-xCaxCo0.8Ni0.2O3 oxides can be achieved when the precur…
Titanium and its alloys are widely used in warship building due to their low density,high specific strength,stable performance at moderate temperatures,and superior corrosion resistance etc,but the use of titanium alloys is limited for its low hardness,poor wear-resistance and poor oxidation-resistanceat at high tempe…
Microcellular wood fiber-plastic composites(WPC) foams were prepared by a single-screw foaming extruder with supercritical fluid injection.The average cell sizes of WPC foams were below 50 μm,and the cell density was above 106 cells/cm3.For WPC foams,when increasing wood fiber content,average cell size decreased,cell…
The application of cotton cellulose xanthate was obtained by the reaction of cotton with NaOH and CS2. By using cotton cellulose xanthate as adsorbent,some factors which influenced the adsorption of nickel ions in wastewater were studied including adsorption temperature,adsorption time,solution pH value,amount of adso…
Carbon nanotubes were one of nanomaterials with unique structure and significant advantages. Polymer nanocomposites filled with carbon nanotubes have attracted considerable attention by scientists in recent years. In this paper, the research and development of the chemical modification for carbon nanotube are summariz…
Dendrimers are three-dimensional repeatedly branched molecules and represent a relatively young class of macromolecules. Next to flexible dendrimers it is also possible to synthesize semirigid conjugated dendrimers by connecting exclusively pi-conjugated subunits. These molecules are characterized by their structure p…
Low hardness and poor wear resistance constrain the practical applications of titanium alloys,especially for those made by P/M.Surface hardening technique is one of the effective means to enhance the surface properties of P/M Ti alloys.Several typical surface hardening techniques for improving surface hardness and abr…
α-Layered sodium disilicate possessed the similar layer structure to the reported solid lubricants(graphite,etc).Based on the foregoing study that δ-Na2Si2O5 had good tribological performance,the oil acid(OA) surface-capped α-Na2Si2O5 particles were synthesized in an anhydrous medium in several base oils and liquid pa…
The process and action mechanism of surface treatment of p-phenylene-2,6-benzobisoxazole (PBO) fibers had been investigated under the conditions of ultrasonic wave and the mixed solution of polyphosphoric acid (PPA) and ethanol. The surface morphology,tensile property and interfacial adhesion between fiber and resins…
Through analyzing characteristic of sheet and strip of 3105 aluminium alloy,brief introducing for the applied status of aluminum alloy in industry of aluminum sheet and strip,short introducing and analysis for processing flow of 3105 alloy strip,it has a positive and practical significance to popularize 3105 alloy in…
The effects of tackifying resin style、high abrasion furnace black content、testing frequency to dynamic mechanical properties were studied by DMA 242. The results showed that tackifying resin had significant effect on the dynamic mechanical property,the material has the biggest peak of tgδ and the highest peak temperat…
Yttria-stabilized zirconia(YSZ) oxygen ion-conducting membrane and electrode catalysts were prepared by ceramic-membrane-making and sol-gel technique.The membrane-electrode assembly(MEA) and cell system consisting of H2S,(composite MoS2 anode)/ YSZ membrane/(composite NiO cathode)as well as air were built up.Binary me…
Researching on the barrier properties of SiOx thin film produced under different power conditions,and gets the relationship curve between electrical power and barrier properties of the films.And the outcome shows that the relationship between power supply and barrier properties is non-linear,and the SiOx thin film bar…
The finite element models of high volume fraction SiCP/Al composites with microdefects were established.And the tensile mechanical properties of these composites were calculated.Through numerical simulation of typical microdefects as voids and interface debondings,it was found that the voids have a little effect on th…
The optimal experiment conditions for the simultaneous determination of Co,Nb,Fe,B in Ni-Mn-Co-Si-Fe-Nb-B alloy steel by whole-spectrum ICP-AES were studied.The experiment factors including the method for dissolving sample,spectra of analyzed element,interfence of coexisting elements,the background correction and inst…
The nano-SiO2 had been treated by as-phase treatment using the coupling agent KH570,monooctadecyl maleate and styrene.The modified SiO2 were characterized by Fourier Infared spectra(FT-IR) and Thermogravimetric analysis(TGA).In order to obtain the best SBS modification ratio,the mechanical properties of the SBS modifi…
The aromatizing reaction of ethanol without oxygen on Pt/CeO2 catalyst was studied,the effects of Pt content,weight hourly space velocity,and reaction temperature on the aromatization of ethanol were investigated.The reaction mechanism was discussed.The activity was good when Pt content was 1%,weight hourly space velo…
In car crash simulation,the effects of thickness change,hardening and residual stress occurring during the forming process of sheet metal part on the car crash simulation results should be considered.The mesh model transferred directly from the forming equipment is usually not suitable to simulate the car crash due to…
The compatibility of pyridyl-functionalized styrene butadiene block copolymers(SBS) and various tackifiers was studied using dynamic mechanical analysis(DMA) in this paper.The results showed that,after blending of the pyridyl-functionalized SBS with different tackifiers,the glass-transition temperature(T g) of the ble…