Materials Literature
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In order to improve the electrochemical performances of A2B7 type hydrogen storage alloy,the effects of bare power and ball milling by nickel on the electrochemical properties of La0.75Mg0.25Ni3.44Al0.06 hydrogen storage alloy electrode in different time were systemically explored.The electrochemical properity and dym…
The continuous annealing processing of transformation-induced plasticity (TRIP) steel was simulated in lab.The microstructure and mechanical properties were analyzed by optical microscopy (OM),scanning electron microscopy (SEM),transmission electron microscopy (TEM),electron-backscatter diffraction (EBSD),X-ray diffra…
The traditional microbiological breeding technology was used to obtain a high Nisin-producing Lactococcus lactisstrain.The parental Nisin-producing strain was treated with UV and nitrous acid.According to the correlation of lethal rate and inducing dose,the lethality curve of UV and nitrous acid treatment were obtaine…
China's paper industry in 2009 is reviewed,and China's paper industry developing trend in 2010 is analyzed.The increase of effective capacity of China's paper industry should rely on the structure adjustment,and the investment must pay attention to its feasibility.
Low calcium fly ash of Panzhihua power plant was applied as raw material to prepare cement-based waterp roof coating.Impacts of the surface modification and chemical activation of fly ash on the performance of coating and activation effect of different activator were compared.At the same time,the experiment has conduc…
Photocatalyst Sr2Bi2O5 powders are synthesized by the polymerized complex(PC) method with Bi(NO3)3·5H2O and Sr(NO3)2 as raw materials,citric acid as chelating agent,water as solvent and ethylene alcohol as etherification agent.The evolution of Sr2Bi2O5 crystal phase is investigated.The surface morphology,specific surf…
Through the reciprocating friction and wear method,and with tank special lubricating oil,wear experiments of spray-formed high-silicon aluminium are investigated with friction pair of engine piston ring and other piston rings.For friction pair of engine piston ring,wearing capacity and friction coefficient of high-sil…
The hot deformation behavior of Al-4.7Mg-0.7Mn0.1Zr-0.4Er alloy was investigated.Compression tests were performed on a Gleeble 1500D thermal simulator system in the temperature range of 300-(500 ℃) and strain rates of 0.001-10 s~(-1) with a total strain of 0.7.The flow curves exhibite steady state flow behavior at tem…
This paper introduces three kinds of arrangement for sleeve charging discharging unit in modern cold rolling mill and their characteristics.
A series of modified waterborne polyurethane-acrylate hybrid emulsion(SiPUA)containing PDMS side chains in PU were synthesized using anionic self-emulsion method.The effect of aminoethylaminopropyl polydimethylsiloxane(AEAPS)content on properties of SiPUA emulsion and film from SiPUA emulsion were investigated chiefly…
In the present study, critical process steps for extracting type Ⅰ collagen from bovine bone, such as defatting, decalcification and extraction medium selection were optimized. Along with this, purified collagen was analyzed through SDS- PAGE, UV, FT-IR and DSC, and compared with the standard of calf-tendon type I col…
Pure titanium surface is modified by electrochemical method in different electrolyte solutions.Experiments of antibacterial activity and biocompability are carried out on the surface of the samples processed in different electrolytes.The results show that pure titanium after processed in electrolyte containg chloride…
A small amount of PbO could induce the passive film of alloy 690TT unstable in the caustic solutions at room temperature.The immersion tests were carried out in high temperature lead-containing caustic solutions in a static autoclave.The results showed that alloy 690TT immersed in 10%NaOH+10 g/L PbO solution suffered…
Sm2InNbO7 powders were synthesized by sol-gel method using Nb2O5,In(NO3)3 and Sm(NO3)3 as raw materials.The structure,morphology and light absorbability of Sm2InNbO7 were characterized by XRD,SEM,BET and UV-Vis diffuse reflectance spectra,respectively.Taking the degradation of methylene blue(MB) dye under visible ligh…
Effect of the sequence and times of normalizing on the magnetic properties in the process of producing the double-oriented silicon steel with cube texture was investigated and the microstructure and the second phase also analyzed on samples with different normalizing methods.It is shown that normalizing twice is not o…
OBJECTIVE To establish the mouse model with multidrug resistance(MDR) induced by repeatedly low-dose doxorubicin.METHODS The mice inoculated by S180 cells were injected with doxorubicin in low dosage.The expression of MDR gene was assayed by flow cytometry and cellular-killed rate was also determined.RESULTS It was fo…
Silver nanoparticles are synthesized from silver nitrate by hydrothermal method in the presence of polyvinyl pyrrolidone as protecting agents and glucose as the reducing agents.The effect of different reaction temperature and the type of surfactant on the morphology and diameter of nano-silver are studied.The features…
In order to improve service life of hot forging dies,the temperature field and stress field of hot forging dies under continuous working state was analyzed using finite element method.According to the distribution of temperature field,hot forging dies is divided into three areas,such as temperature fluctuation area,te…
Fe-based composite coatings reinforced with WC particulates were produced on 1045 carbon steel by thermal spray welding.The microstructure was characterized by means of scanning electron microscopy(SEM),field emission scanning electron microscopy(FESEM) and analysis of energy dispersive spectrometer(EDS).The abrasive…
Mg-4Al-2Si(AS42) magnesium alloys were prepared by the gravity casting.Microstructure and mechanical properties at room temperature of the as-cast AS42 alloy were investigated.The results show that the as-cast microstructure consists of α-Mg matrix,β-Mg17Al12 phase and Mg2Si phase.The network and rod shaped β-Mg17Al12…