Materials Literature
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3D carbon/carbon(C/C) composite materials with different porosities and bulk densities were fabricated by repeated precursor infiltration and pyrolysis(PIP) process,and the electromagnetic interference shielding(EMI) effectiveness of C/C composites at 8.2-12.4 GHz(X band) with different porosities were studied.The res…
As a non-thermal physical technique,ultrasonic technology has many advantages,such as short time,low energy consumption,effective conservation of the food nutrients and natural characters of color,smell and taste.Therefore,it would have wide prospect of industrial application.Ultrasound is able to inactivate microbe c…
Harmful chloride ionhloride ions in sea sand concrete are the main problems that hinder in its application.Sand concrete experiment were conducted using fly ash,ground slag and other active minerals mixed together,the working performance,mechanical properties and durability of different ratios of concrete have been re…
The technology of localized ultra-high frequency induction brazing is introduced.The effect of influence factors,such as material of ferrite core,gap and coil structure,on temperature in induction brazing are investigated and analyzed.An optimal combination of technological parameters is obtained through experiments.A…
The nuclear power plant and passive residual heat removal system were modeled and investigated with the advanced code developed from RELAP5/MOD3.2 code,for analyzing the influence of local natural circulation on the passive residual heat removal in nuclear reactor.The simulation results were validated with experimenta…
An asymmetrical bending control system of work rolls was designed to decrease the asymmetrical flatness defect of a cold-rolled strip.The influence function was adopted to calculate the deformation of the roll system and the effect of the lateral flow of metal in the roll gap on the transverse tension distribution of…
In order to investigate the crack initiation and development of 685 homogeneous steel under quasi-static loading and dynamic loading,quasi-static fracture toughness and dynamic fracture toughness were tested respectively by using quasi-static loading testing machine and modified Hopkinson bar and adopting three-point…
The microstructure and mechanical properties of a Q690D high strength steel quenched at different temperatures were investigated.The results show that when the quenching temperature is between 890 ℃ and 970 ℃,with increasing quenching temperature,the strength of the tested steel increases firstly then decreases and th…
Mannich base was synthesized from paraformaldehyde,cyclohexanone and aniline via aldehyde ketoamine condensation,then it reacted with benzyl chloride to obtain quaternary ammonium.The high temperature corrosion inhibitor CPA-10 was prepared from the quaternary ammonium,alkynol and potassium iodide.The best formula of…
TC4 and TC17 titanium usually used on aeroengine blisk were studied.The microstructures were analyzed by metallograph and transmission electron microscope.The temperature during the welding process was also measured.The investigation showed that the joints included three zones,base metal(BM),thermal mechanical affecte…
The effects of Sb on the microstructure and mechanical properties of Mg-4Al-4Si (AS44) alloys were studied.The results show that the microstructure of as-cast AS44 alloy consists of α-Mg matrix,β-Mg17Al12 phase and Mg2Si phase before adding Sb.The phase Mg2Si exists in three different morphologies,namely the coarse sk…
In order to improve the quality of silk fibroin yogurt,a two-variable,three-level factorial experimental design was used to explore the effects of silk fibroin in combination with one of four common stabilizers including pectin,xanthan gum,sodium alginate,acid-resistant carboxymethyl-cellulose(CMC) on the viscosity an…
Epoxy resin used as insulating material in radioactive environment is subjected to a great risk of surface discharge that is originated from surface charge accumulation.For the safe use of the material,it is essential to gain a firm understanding of surface charge dynamics in response to high energetic irradiation.To…
In order to understand the characteristics of high-speed water jet impact zone and effect of material crushing,the research on water cushion in impact zone and influence of material crushing has been conducted according to the theoretical analysis,numerical computation and high pressure water jet smash experiment resu…
Impacts of climate change on phenophase of Kobresia pygmaea at high(4 175.0 m) and low(3 500.0 m) altitude regions in the Qinghai Plateau were studied by analyzing the observation data obtained from Qumalai and Henan meteorological stations from 1989 to 2010.The results showed that during the past 22 years the air tem…
The low-temperature selective catalytic reduction(SCR) denitrification of a flue gas was carried out with Ce-MnOx/ACFN.The denitrification efficiencies were studied by modifying the activated carbon fibers(ACF) and changing the Ce-MnOx loading capacity,Ce/Mn molar ratio and operating conditions respectively.Ce-MnOx/AC…
Because signal of leakage current is rich in messages which can suggest the running state of the insulator,we experimentally researched AC artificial pollution of single XP-70 insulator in the artificial fog chamber in our Laboratory,and investigated the effects of three kinds of equivalent salt deposit density(ρESDD)…
The specific heat capacity of poly(lactic acid)(PLA)was measured from 40 ℃ to 180 ℃ obtained by DSC;The thermal conductivity and diffusivity of PLA in different injection processes were investigated using TPS.It was found that the specific heat capacity of PLA would change with the temperature which leads to the diffe…
In order to save weight in a certain engine application the possibility of replacing the currently used material with cast Ti-6Al-4V is investigated here. The working environment for this particular engine part is pure hydrogen gas at high pressure. Therefore selected mechanical properties such as tensile and low cycl…
Two kinds of deinking processes,neutral deinking process and alkaline deinking process,were used for old newspaper(ONP) deinking.Olympus inverted biological microscope was used to analyze fiber and ink particles dispersing behaviors in the deinking system.Waste-paper fiber structures before and after deinking were cha…