Materials Literature
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The microstructure and mechanical properties of ZK60 magnesium alloy in as-extruded,T5,T6 and double aging states were investigated by tensile test,optical microscopy,SEM and TEM.The results show that T5 treatment can obviously increase the yield strength and elongation of ZK60 magnesium alloy,while T6 treatment has n…
This paper presents a feature extraction method of foreign fibers in lint cotton by analyzing chrominance distributions of cotton image.Cg is substituted for Cb and then the YCrCg color space is formed to extract the foreign fiber features.To fuse the chrominance features effectively,the moment-preserving principle is…
Using Y2O3-A12O3-SiO2-Li2O-K2O-Na2O as Ce-doping or Ce,Pr co-doping glass matrix,Ce:YAG and Ce,Pr:YAG glass ceramic for White-LED(WLED) was prepared by heat treatment of the glass matrix.The formation of YAG crystal phase,morphology,luminescence properties and lifetime were examined by X-ray diffraction(XRD),Field-emi…
A simplified model of transmission line of impedance distributed parameter weighted ratio and finite difference time-domain method were used in the calculation and electromagnetic simulation analysis of the attenuation spectrum characteristics of PD pulse in cables and joints,for the distinctive multi-layered semi-con…
To improve the solid content of casting explosive based on RDX,the spherical RDX was prepared by recrystallization using Cyclohexanyne as a solvent.The influence of crystallization temperature,stirring speed and impurity on RDX crystal shape was analyzed.The crystal shape,free-flowing property,impact sensitivity and f…
Based on an analysis of existing thermodynamic data,a two-parameter model for estimating standard enthalpy of dual intermetallic was developed.The parameters of 34 kinds of melts were obtained by analyzing the model.It can estimate the standard enthalpy of dual intermetallic composed of simple metals,involving multi-s…
In order to obtain large and high quality pearls,the methods of the pearl culture in visceral mass combined with inserting large pearl-nucleus co-cultured by dissociating mantle cell were studied.The mantle cell was cultured by two different culture mediums that were named medium 1 and medium 2.The cell viability was…
Oxidation rate of copper was studied by scanning electron-microscopy(SEM),X-ray diffraction(XRD) and oxidation weight gain experiment,and the effects of different structure,grain size of copper and temperature on oxidation rate were analyzed.The results show that the structure is the main factor to oxidation rate for…
In order to improve the properties of some steel casting,the study was carried out based on the steel castings of ZG25MnNi and ZG30Mn2,which were practically used in coal mining industry.The button ingots of cast steel were produced by using of the vacuum arc furnace in lab.At the same time,the heat treatments were st…
In order to provide a simple and effective technological measure for consolidation and protection of fragile silk fabric relics,a consolidation experiment was conducted to silk fabrics aged by hydrolysis and light treatment with L-cystine(L-Cys) and ethylene glycol diglycidyl ether(EGDE) as consolidation material.Brea…
A polysilane with zirconium was synthesized by electrochemical method,using methyltrichlorosilane,allylchloride,Cyclopentadiene and Zirconium tetrachloride as monomers.The product was characterized by FTIR,UV,NMR and XRD.Its double-bond,elements content,molecular weight and molecular weight distribution were determine…
High-performance hollow glass microspheres(HGM) have many excellent performances.In addition,as the key fillers of the materials,their mechanical properties play a decisive role in the performance of composite materials.The characterization methods of the compression strength of the HGMs as well as its influence facto…
The Si-doped TiO2(Si:TiO2) powder was prepared by a two-step sol–gel method and its phase composition and surface structure were characterized through X-ray diffraction,thermogravimetry–differential thermal analysis and X-ray photoelectron spec-troscopy.The photocatalytic activity of Si:TiO2 powder was investigated us…
The microhardness of the cross section of metal surface layer and the nano-mechanical properties of cavitation corrosion surface layer for austenitic stainless steel after cavitation corrosion test were quantitatively determined by micro/nano mechanics measurement technology on the base of researches on the cavitation…
On the basis of characteristic polymorphic crystals of poly(butylene adipate)(PBA),the PBA films with α crystal structure were prepared by melt crystallization and annealing treatment.The polymorphic crystal structure,crystal size and crystalline morphology of PBA α crystals with different thermal history were studied…
Higher-efficiency and lower-cost pretreatment methods for bamboo and its residues are important in energy utilization.In this study,two kinds of bamboo residues(bamboo shoot shell) fiber and bamboo stem and leaf were pretreated by three methods,and the treatments were compared with those for corn stalk.The results ind…
For three typical ammonia injection technologies of selective catalytic reduction(SCR) flue gas denitration system,an optimization adjustment method of ammonia slip control was designed.According to outlet NO distribution of flue gas denitration system,the ammonia injection system was adjusted to make the ammonia dist…
The dynamic mechanical property of molybdenum-catalyzed high 1,2-polybutadiene rubber(1,2-PBR) was investigated,and compared with that of BR and SBR.The results obtained from frequency,temperature and strain scanning tests showed that,G′ of 1,2-PBR vulcanizate was lower and the G′ changed little with frequency because…
Durability problems of concrete reinforced with ordinary carbon steel present a severe challenge for service lifetime and security of structures.One of the most reliable methods to assure corrosion resistance and extend the design service life is to adopt stainless steel rebar(SSR).Relevant experimental and theoretica…
Dealloyed nanoporous metals(NPMs) represent a new class of functional materials with unique structural properties such as high surface area,low density,high permeability,high electrical and thermal conductivity,and tunable structural features,which make them very attractive for important applications including catalys…