Materials Literature
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Objective To delay or inhibit corrosion of aircraft structure. Methods Totally five different kinds of corrosion inhibitors(TFHS-15,LPS03316,AV15,Cor-Ban 35,Corrosion X Aviation,WD 40) were selected which had been used for aircraft maintenance. And the GM9540 P accelerated corrosion test was adopted to evaluate the co…
The UV ignited self-propagating curing resin blends,including cycloaliphatic epoxy( CEP) and organic silicone resin modified by epoxy( ES),were designed. Based on the blends,carbon fiber fabric reinforced composites can be cured quickly by UV radiation. Adhesively bonded repair of damaged metallic structure using UV c…
Among the improvement of the heat treatment of metal materials, quenching is one of the most common heat treatment processes. But for the large diameter thin-walled sleeve parts, the low service life and low strength and hardness of its inner surface is often generated due to low reduction speed of the temperature in…
Objective To improve the bonding ability between carbon fiber and matrix resin. Methods The surface of carbon fiber was modified by chemical grafting of PMMA. First,mixed acids of nitric acid and sulfuric acid were used to pretreat the carbon fiber,leading to the formation of reactive functional groups on the surface,…
High-alumina plastics in CFB Boilers were prepared from the raw materials including high alumina bauxite,silica fume and aluminum powder. The binding agent was Aluminum dihydrogen phosphate and phosphoric acid. The effect of magnesia on the property of high-alumina plastic was studied. The mechanical properties at roo…
AZ91D Mg alloy was immersed in the KH-550 solution to form the silane coating,and orthogonal experiments combined with single factor experiments were applied to determine the optimal curing process conditions such as curing temperature and curing time.The corrosion resistance of the silane coating based on the optimiz…
Titanium,vanadium,niobium and molybdenum were added into 2.85C- 31 Cr high chromium cast iron to prepare multicomponent chromium alloys. The influence of titanium,vanadium,niobium and molybdenum on microsturcture evolvement and impact wear properties was investigated. The results show that carbon in iron liquid togeth…
N-doped ZnO(N-ZnO)was prepared with self-designed high temperature annealing devices in NH3 gas.The relationship between preparation condition,band gap,and photovoltaic conversion efficiency of N-ZnO was investigated.ZnO with different N doping concentration was obtained by varying NH3 gas pressure,annealing temperatu…
TiO2 can only absorbs the ultraviolet in sunlight, and the recombination of photo-induced protons and electrons is very fast, which impact the TiO2's photo-catalytic efficiency. In order to improve the photo-catalytic properties of TiO2, people devoted themselves to doping and modifying. Here we introduced the doping…
A method of image segmentation based on yarn color was proposed for the characteristics of backed weave images. Firstly,the image was transformed into a Lab color model,and hybrid median filter was used to remove scanning noise; then,a smoothing filter was improved by changing Gaussian weight with the allowable value…
Atomistic molecular dynamics(MD) simulations were conducted to elucidate the adsorption behavior of hydrophobin protein(HFBI) on the hydrophilic mica surface. Six independent simulations starting from three representative initial orientations of HFBI toward the surface were performed. The adsorbed patches are clustere…
Tungsten carbide is widely used in the production of cemented carbide materials and the content of tungsten in tungsten carbide has a significant impact on its performance and cargo accounts settlement.The ratio error and grinding in the production process produces generous tungsten-containing waste,and the recovery o…
Graphene is the only existing two-dimensional atomic crystal material,whose excellent mechanical properties,high transparency,good conductivity,excellent chemical stability and flexibility confer great potential application in the field of conducting films.Focused on a variety of preparation methods of graphene films,…
Inorganic porous materials have attracted considerable research interests due to their wide applications in biocatalysis,biosensing,and bioseparation.In this paper,inorganic porous cerium-based materials were synthesized and insitu deposited on microscope slides via a crystal colloidal templating method and their stru…
Herein, a facile synthesis has been explored to prepare carbon aerogel/Ni foam. Graphene oxide, resorcinol and formaldehyde serve as precursors and polymerize in-situ on the Ni foam after hydrothermal synthesis at 85 oC. After lyophilization treatment, the carbon aerogel/Ni foam with porous structure can be obtained.…
Effect of flowing on galvanic corrosion of 316L/2205 and 431/2205 couples in 3.5% NaCl solution was investigated by potentiodynamic polarization,galvanic current and corrosion morphology analyses.The galvanic behavior of these couples was compared with that of 42CrMo/316 Lcouple.The results showed that 316 L,431and42C…
Cu-SSZ-13 catalysts had been prepared by using a microwave irradiation(MW) method and a conventional hydrothermal(CH) method, which were applied to removal of NOx from diesel vehicles by NH3.The physical and chemical properties of the samples were characterized by X-ray diffraction(XRD), N2adsorption-desorption, H2 te…
Ni0.5–xZn0.5Co0.1CuxFe1.9O4(x=0, 0.10, 0.15, 0.20) ferrite powders were synthesized by sol-gel auto-combustion using citric acid as gel and metal nitrates as raw materials, then these powders were sintered for 2 h under 800 ℃. Magnetic properties and phase structure of the ferrite powders were analyzed and characteriz…
The synthesis and modification of melamine formaldehyde resin by adding ammonium persulfate solely or both ammonium persulfate and sodium hydrogen sulfite at the same time were studied in this paper. When n( melamine) ∶ n( formaldehyde) ∶ n( methanol) ∶ n( ammonium persulfate) = 100 ∶ 330 ∶ 450 ∶ 1 was applied,wet ten…
Based on the principle of copper slag dechlorination and by copper slag dechlorination exploratory test,determine the hydrometallurgical zinc concentrate tank neutral supernatant of copper slag dechlorination. And the supernatant copper slag dechlorination semi-industrial tests determine the copper slag dechlorination…