Materials Literature
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(33-x)(Pr-Nd)-xGd-0.2Cu-0.75Al-1.10B-64.95Fe and(33-x)(Pr-Nd)-xHo-0.2Cu-0.75Al-1.10B-64.95Fe sintered magnets with different amounts of Gd or Ho additions were prepared.Effects of Gd or Ho additions on the magnetic properties,thermal stability and microstructure of sintered magnets were investigated.Result shows that…
Due to the jamming problem of the ammunition hoist of a large caliber naval gun caused by excessive rocking of shells occurring during the ammunition feeding process,a new ammunition chain multibody dynamic model with flexible joints was established.In the ammunition chain dynamic model,the nonlinear contact-impact an…
As the main greenhouse gas,CO2 emission reduction issues caused the worldwide attention.In order to solve the problems of the CO2 absorption,experiments of CO2 from simulative flue gas by ammoniay are investigated.Removing CO2 in flue gas with carbonized aqueous ammoniay benefits energy-saving and environmental protec…
The CaSO4 resistance performance of three scale inhibitors PASP,HEDP,PBTCA and their combination were determined by conductometric method.The effect of tempetature,pH on the scale inhibiting performance of two-component system was studied too.It was found that the synergistic effect of the two-component system which h…
The study on inclusion between β-cyclodextrin and NHPI in aqueous solution has been made.The ratio of inclusion 1 ∶1 was calculated by the method of Hildebrand-Benesi,which was tested by IR.The inclusion constant was also calculated,which was 1 412 L/mol.The thermodynamic parameters for inclusion reaction such as ΔH,Δ…
Organic-inorganic hybrid Photosensitive SiO2-TiO2 materials were synthesized by a sol-gel process. The hybrid films were deposited on silica glass substrates and silicon wafers by spin-coating. After the process of prebaking, UV-light exposure and postbaking, the films with the same patterning of mask were obtained. T…
Chrome tanning wastewater is a major pollutant in tannery waste water,and is a potential harm to the environment and human.In this paper,the hazards of chrome tanning wastewater,disposal methods are discussed,and the utilization research direction of Chrome tanning wastewater are proposed.
Dyeing and finishing process of polyester differential fiber is introduced.That is pretreating temperature 190 ℃ and presetting time 30 s in order to prevent wrinkle formation and enhance the flexibility of the fabric;the best deweighting rate of 11%~13% with alkali;disperse dyeing at 120 ℃,or one step whitening and d…
Sulfur hexafluoride is with excellent arc suppression and insulation performance.Because it belongs to greenhouse gas in ultra high-voltage switchgear,there is a need to reduce sulfur hexafluoride gas.Comparison was made to main characteristics of sulfur hexafluoride gas and its substitution gases.Taking Japanese 550k…
A novel kind of anti-corona material was applied to carry out experiments of anti-coronastructure optimization in which anti-corona structure and resin-rich stator insulation were integrated to perform one-step hot die forging test and an optimum anti-corona structure and formingprocess for 24 kV and 26 kV/1 000 MW st…
In this work,urea-formaldehyde resin/epoxy microcapsules were synthesized and used to design self-healing polyester/carbon fiber composite materials.Mechanical properties,scanning electron microscopy(SEM) and optical microscope(OM) were employed for a study on the microcapsules and self-repairing materials.Carbon fibe…
Nano-crystalline cellulose(NCC) sulfuric acid suspension,which was prepared in 45 % sulfuric acid solution,was acted as a kind of additive for fumed sulfuric acid gel electrolyte,by this way,a series of gelled electrolyte with different content of NCC were prepared in 1.28 % sulfuric acid solution and fumed nano-SiO2…
With the high specific strength and high specific modulus,carbon fibre reinforced aluminum matrix composites has a broad prospect of application in aerospace field.However,several forms of corrosion might happen in the course of use. In this paper,the morphology and composition of Ce conversion coating are studied by…
The effects of Sb addition and reciprocating extrusion(RE) deformation on microstructure and properties of Mg-4Al-2Si-0.75Sb alloy were studied.The refinement mechanisms of α(Mg) matrix and the Mg2Si particles,as well as the effect of Mg2Si particles on the recrystallization were discussed.The results show that the ad…
New kind of NdFeB-based permanent magnets named as SPS NdFeB magnets were prepared by using spark plasma sintering technique(SPS).To well comprehend the sintering characteristics of SPS NdFeB magnets with two kinds of compositions,the microstructures,magnetic properties and densities of SPS NdFeB magnets sintered at d…
The molecular structures of the ground state of complexes CdL2 and its hydrates were optimized with density functional theory(DFT B3LYP).The charge distribution and the infrared spectra of these molecules were analyzed.The electronic spectra of the above structures were abtained by the time-dependent density functiona…
The UPFs of cotton fabric and pearl fiber/cotton blends were tested.And the influence on the anti-ultraviolet property of the fabric from material,yarn fineness,yarn density were analysed,and the influent order was obtained.The results showed that pearl fiber/cotton blends had excellent anti-ultraviolet property.
The synthesis and characterization of poly-β-hydroxyalkanoates(PHA)by activated sludge from acidified starchy wastewater were studied.The results showed that the acidification products of starchy were butyric,acetic,propionic,valeric acids and ethanol.These organic acids were used to feed activated sludge to produce P…
Using barley foam-active protein as raw material,the modified protein was prepared in heating. The optimal processing was investigated through orthogonal test,which led to the conclusion that the optimum graft reaction conditions were as follows:the weight ratio of glucose to protein 1∶2,pH 9.5,60 min would yield graf…
By the static whole-soaking test in simulated seawater,the effect of nickel and silicon on corrosion resistance of low temperature high toughness ductile iron was studied.The results show that with constant silicon content,the corrosion rate of the iron decreases with the increase of nickel content;and with constant n…