Materials Literature
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The annealing process was made under different temperature and holding time to the cold forging AZ31 magnesium alloy with different deformation ratio.The results show that the relationship between annealing time and volume fraction of the static recrystallization can be described by the JMAK equation by the investigat…
In the paper,with Taguchi experiment design method and BP(Back Propagation) neural network technology,the effects of four factors,molding temperature,molding time,injection pressure,and molding pressure on the expansion ratio of foamed ethylene-vinyl acetate copolymer(EVA) were studied with a four-level orthogonal exp…
The variation of electrochemical impedance of an anodic oxidation film on aeronautical aluminum alloy 7B04 during accelerated degradation test was studied using electrochemical impedance spectroscopy(EIS).It has been found that the gloss and the color difference of sulfuric acid anodic oxidation film had little change…
Four kinds of different compositionally graded ZrN coatings were prepared on 2Cr13 stainless steel by ion plating. The element distribution on the layer depth was analyzed by glow discharge spectrometer (GDS). The supporting capacities under static load conditions of these coatings were evaluated using a micro-hardnes…
The paper has the indication for the characteristics of the environmental planning for electrolytic aluminum factory,its planning instruction,the factual thoughts,the selection for trees' seeds,the rough estimation of investment,so as to build the electrolytic aluminum factory as a new factory with long-time blossom a…
OBJECTIVE:To prepare triptolide-loaded sustained release microspheres and investigate its release profile in vivo and in vitro.METHODS:Triptolide-loaded sustained release microspheres were prepared by solvent evaporation method.A motionless method was used to investigate the process of release in vitro.The in vivo rel…
Bridgman method has been greatly developed and widely used for the unidirectional solidification of metallic materials and single crystal growth of variant functional materials over the 80 years since its initiation. Solute redistribution as well as its resulted concentration segregation is still a vital problem for t…
Introduction was made to two kinds of riveting tooling for typical parts in KFM3 case-moulded circuit breaker.Aiming at arc extinguish chamber structure features in KFM3 new product,riveting tooling with upper and lower automatic material pressing push-bar was designed.Analysis was made to the causes of workpiece turn…
In this paper,based on the cold extrusion principle in metal plastic forming of less or no chip,a simple,reasonable and feasible mold structure is designed by analyzing the cold extrusion technology for the spur cylinder gear.And then a cold extrusion experiment is carried out successfully,the results show that the ne…
The processes on treatment of nickel waste in recent years were briefly reviewed in the paper.Meanwhile,the novel methods researched with prospect application at home and abroad were also introduced.In addition,the main existing problems of nickel waste processing and the main directions in nickel waste treatment were…
The three-dimensional FEM models of discrete rod were built with ANSYS.The warhead explosively driven process was numerically simulated by LS-DYNA with Lagrange algorithm.The study shows centre point initiation make discrete rod achieve higher speed and reliability for target damage.The result of numerical simulation…
The multilayer ceramics were prepared by screen-printing method to brush Al slurry on Al2O3 slices and heat treated in oxidizing enviroment.The effects of the layers of Al2O3 slices and the heat treatment temperature on the bending strength,the fracture toughness,and the impact energy of the multilayer ceramics were i…
The adsorption and desorption performance of macroporous resin NKA-9 to the chlorogenic acid was studied.The static adsorption and desorption index of NKA-9 was 72.30% and 79.74%,respectively.The adsorption quantity reached at the maximum value when the adsorption time was 6 hours,and the desorption quantity achieved…
The nylon 636,a kind of polyamide with long carbon chain was synthesized by using dimmer acid and hex-amethylenediamine.The chemical structure of nylon 636 was characterized by FT-IR and 1H-NMR.The physical and me-chanical properties were determined.The result showed that dimmer acid nylon 636 was a good engineering p…
The recent advances in the main clean processes to synthesize diphenylmethane diisocyanates (MDI) are reviewed,such as BTC method,condensation of aniline,reductive carbonylation of nitrobenzene,oxidative carbonylation of aniline,methoxycarbonylation of aniline,alcoholysis of N,N′-diphenyl urea and the coupling process…
Layered cobalt oxide YBaCo2O5+δ for solid oxide fuel cell cathode material was studied by observing the microstructure, thermal expansion and electrical conductivity. It is found that YBaCo2O5+δ has excellent thermal expansion matching Ce0.8Gd0.2O2–δ electrolyte, as well as better structural and chemical stability at…
Being aware of the present reality of the nuclear industry and nuclear technology application in Guangxi Zhuangzu Autonomous Region,the present supervision conditions on nuclear and radiation safety are analysed.Some suggestions,such as constituting Guangxi safety management system of radioactive source,standarding th…
The binary oxalate precursor was prepared by solid-state reaction at room temperature with Zn(NO3)2·6H2O,Fe(NO3)2·9H2O,Oxalic acid and PVA as soft template.Then,the red-brown powders were characterized by SEM and XRD after calcination at 600 ℃ for 3 h.The results show that the one dimensional rod-like Zinc ferrite(ZnF…
The electronic and optical properties of Mg(Ni:MgAl2O4) are investigated by use of the density functional theory(DFT).The calculated results indicate that Mg(Ni:MgAl2O4) is a semiconductor with a small gap 2.94eV.It is concluded that the doping element Ni has specific rule in the MgAl2O4 spinel,which leads it showing…
The paper investigated the technology of polylactic acid fiber Sirospun yarns by changing the roving gauge,roving twist coefficient and back drafting multiple.It analyzed during different spinning processes,the changing patterns of the index of yarns such as breaking strength,fuzzy fiber and yarn evenness.It had also…