Materials Literature
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Magnesium matrix composite (Al2O3f/Mg-9Al-0.5Nd) was fabricated by pressureless infiltration. The effects of heat treatment on mechanical properties,friction and wear properties of composite were studied. The morphology of worn surface and wear mechanism were explored by using SEM. The results showed that the hardness…
The technology and thermodynamic processes judging of self-propagating high-temperature synthesis(SHS)are introduced briefly.In particular,new progress and questions of SHS method are reviewed.The research status of preparation and application of MnZn,NiZn and MgZn ferrite material by SHS is summarized.In particular,t…
Three kinds of phosphorus-containing flame-retardant copolyesters were prepared by the way of blend and copolymerization,and then the flame retardancy of the FRPET was compared.The results show that the flame retardancy of FRPET,which was blended with HAPP-Na,is improved.The LOI value of FRPET is enhanced up to 26.4%…
Benzene and ethyl chloroglyoxylate underwent Friedel-Crafts reaction in the presence of AlCl3 to give nomal product ethyl 2-oxo-2-phenylacetate at low temperature(0 ℃).However,when the reaction was performed at high temperature(70 ℃),an unusual product 9,10-dimethylanthracene was obtained as the main product for the f…
The polypyrrole/attapulgite nanocomposites(PPy/ATP) were fabricated via in chemistry oxidation polymerization of pyrrole(Py)monomer,using sodium dodecylsulphonate and FeCl3·6H2O as dopant and the oxidant,respectively.The as-prepared nanocomposites were characterized by XRD,TG-DTA,FTIR and TEM.With increasing the dosag…
The production technology,microstructure and property of hot rolled high strength double-faced enamelled plate of Anshan Iron Steel Co.,Ltd.were introduced.The mechanism of realizing good double-faced enamel property and high yield strength were analyzed.By practical production,the product can meet the need of enaml,a…
Polyvinylacohol(PVA) bearing styrylpyridinium group(PVA-SbQ) is a new photosensitive polymer,styrylpyridinium group on side of PVA main chain can be cross-linked under UV radiation to form network.Photocross-linked chitosan-(PVA-SbQ) blend membranes were made by mixing the solutions of chitosan and PVA-SbQ.Its structu…
Based on understanding of selective oxidation of alloys,a novel concept was proposed for nanoscale designing of high-temperature corrosion-resistant coatings,and various types of nanocrystalline metal-base nanocomposite films dispersing nanoparticles of Cr or/and Al were assembled using a co-electrodeposition techniqu…
Sudden break of the spinning blades of the expander of a FCC set happened.The reasons of the fracture were analyzed and the solutions were posed from the following aspects: the materials of the blades,machining performance,microstructure,the inclusion of blades,the section of fracture and the inlet and outlet pipeline…
In order to calculate the inhomogeneous deformation in oval-round pass sequence of wire rolling,the principle of the equivalent rectangular approximation method was adopted.It was found that the overlapping area between the two equivalent rectangular sections is the key factor to solve the effective strain.The stock s…
The relationship between the nature of activated carbon and the performance of capacitor was reviewed.The research progress of carbon materials,including activated carbon prepared from different raw materials,modified activated carbon,activated carbon fiber,carbon nano-tubes,carbon black,used in capacitor electrodes w…
The search for ways to control the size,shape and hence properties of organic molecular crystals,which is well established for inorganic crystals,was an important aspect of possible developments in nanoscience. In this article,by halogenation,esterification,Wittig-Horner and Sonogashira reaction,a functional low molec…
The hot rolling experiment was carried out,and the relationship between mechanical property and parameter of rolling can be known to establish rational rolling schedule for manufactory.The results include that the strengthening mechanism of plates are fine-crystal strengthening and precipitation strengthening which is…
Taking domestic rabbit skin as raw material,the bating,pickling and tanning process of the double face glove leather of rabbit skin were studied by checking the physical-mechanical properties and sensory properties in each process.The results indicated that the crust could obtain excellent properties and fulfill the n…
PAMAM Dendrimers have been synthesized by divergent method.The optimum reaction conditions of synthesis integer generation PAMAM dendrimers are as follows:reaction time 24 h,reaction temperature 25 ℃,n(0.5G)∶n(EDA)=1∶8,the quality of the percentage solvent methanol 20%.Using infrared spectroscopy(IR),the products were…
A jerky measurement of the shape of hot rolled strip was done on the 6-stand 4-high hot strip mill in a certain domestic steel plant,based on an experimental scheme.Then,the values of interstand workpiece crown,rolling force,roll bending force and actual curved surface of roll profile were measured at each and all pas…
Iso-amyl propionate was synthesized by the esterification of propanoic acid with iso-amyl alcohol using ammonium cerous sulfate as a catalyst. The effect of different factors, such as reaction time, the amount of catalyst and the ratio of iso-amyl alcohol to pripanoic acid on the yield of iso-amyl propionate were care…
The tanning properties of QUIMITAN ABC have been compared with chrome powder and chrome containing sytan by pretanning and retanning.The results show that the shrinkage temperature of the leather tanned with QUIMITAN ABC is 101.4 ℃,and the physical-mechanical properties of QUIMITAN ABC tanning leather are better than…
The effects of pore structure of the support on behaviors of the long chain paraffins dehydrogen- ation catalysts were investigated using dehydrogenation of n-C_(10～13) as the probe reaction.Results show that the effective pore volume (pore size distribution) had remarkable effects on the catalytic behaviors while ove…
The flat-type structure is a relatively simple structure of TFPM.This paper studied theoretically the electromagnetic force characteristic of flat-type TFPM.Several typical 3D structure models of flat-type TFPM were built by using Amspft.The relationship between electromagnetic force and electric angle of each model w…