Materials Literature
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Quantitative metallography technique was used to investigate the effects of hot isostatic pressing(HIP) treatment parameters on microstructure of ZTC4 casting titanium alloy.The results show that the β grain size and α lamella thickness of ZTC4 increase obviously after HIP treatment relative to as-cast microstructure…
The progress of the porosity,wettability,mechanical strength,thermally dimensional stability,shutdown as well as meltdown temperature of separator towards Li-ion battery is summarized.The results suggest that the wettability can be improved by grafting functional groups or adding hydrophilic oxides.Using polymer mixtu…
Slow crack growth(SCG)of polyethylene pipe was briefly reviewed,and various corresponding evaluation test methods of SCG were presented.SCG requirements of polyethylene pipes for water and gas using in GB standard and ISO standard were reviewed and their differences were also analyzed.In addition,differences of SCG re…
Highly ordered amino-functionalized mesoporous silica thin films(MTFs) were directly synthesized by co-condensation of tetraethoxysilane(TEOS) and 3-aminopropyltriethoxysilane(APTES) in the presence of P123(EO20PO70EO20).According to the neutralization-reaction mechanism followed by a reduction procedure of hydrogen-a…
Cavitation is a kind of complex hydrodynamics phenomena,which only exists in liquid.Research status on cavitation characteristics is reviewed,including bubble equation of motion,therotical analysis,cavitation experiment,as well as bubbles study.Research on bubble cluster makes cavitation study close to engineering pra…
Xinaomycin is a new nucleoside agricultural antibiotic isolated from the fermentation broth of Streptomyces noursei by our laboratory.The physicochemical properties of fermentation broth and the extraction methods of Xinaomycin were studied.The results showed that Xinaomycin is a water-soluble antibiotic,which was sta…
To investigate the depressing blood pressure mechanism of the sulfur dioxide(SO2) in vascular smooth muscle cells,we studied the outward potassium current(I Kv) with whole-cell configuration patch clamp technique in these cells which were obtained through acute enzyme separation method.The results show as follows:SO2…
Crossflow microfiltration of yeast suspensions was carried out using three types of ceramic membrane with different configurations.The effects of membrane configuration on filtration performance were investigated.The results showed that reducing the diameter of the membrane channel could increase the shear stress of t…
To develop a kind of refractory material suitable for microwave metallurgy,cordierite-mullite refractory materials with different mixture ratios were synthesized by sintering at normal atmosphere and different temperatures.The effects of sintering temperature and mixture ratio on phase composition,bending strength,the…
In order to improve the interfacial bonding properties of collagen-hydroxyapatite(Col-HA) composite, gum Arabic was introduced in the system.Ca(NO_3)_2·4H_2O,(NH_4)_2HPO_4,acid dissolved collagen,and gum Arabic were used as the raw materials to in situ prepare collagen-hydroxyapatite/gum Arabic(Col-HA/Gum A) composite…
Effects of different heat treatment processes on microstructure and mechanical properties of welded joints of 22MnCrNiMo mooring chain steel were investigated.The results show that the strength and ductility of welded joints of 22MnCrNiMo mooring chain steels are both improved significantly after 930 ℃×30 min quenchin…
By means of the centrifugal casting method,high speed steel(HSS) rollers with excellent wear resistance have been successfully manufactured.The main compositions of HSS rollers are 1.5%~2.0% C,3.0%~5.0% Mo,1.0%~3.0% W,2.0%~3.0% V,1.0%~2.0% Co,1.0%~2.5% B and 5.0%~8.0%Cr.The hardness of HSS roller is 85~88 HS,the range…
Some liquid alkanes bearing 5—24 carbon atoms were optimized in structure and the topological distance matrix was built with the space topological distance among atoms calculated by using density functional theory(DFT)at the B3LYP/6-31+G(d)level.A new group of topological index PXm(m=1,2,3)was introduced based on the…
By using LS-DYNA software,the formation of jetting projectile charge was simulated,and the simulation results were validated through X-ray imaging experiment.Both results are in agreement well.The formation condition of jetting projectile charge with different length-diameter ratio of charge was studied at the same ti…
TC16 titanium self-lock hex nut is an advanced joining part.Featuring lightweight,high intensity,anti-correction and anti-vibration,etc,this part is widely used in fighting aircraft.The application of such nut is helpful to such critical technologies as heat treatment,contamination removal during heat treatment,perfor…
Heterocyclic aramid was synthesized by introducing heterocyclic diamine in low-temperature solution.Heat-resistant was further improved because of the introduction of heterocyclic diamine.Thermal degradation dynamics of heterocyclic aramid were analyzed by themogravimetric(TG) at different heating rates and atmosphere…
Microstructure of high-strength deformation zinc alloy ZAT10 were investigated by means of DSC,XRD,SEM and EDS,and its TTT curve was obtained by hardness method.The results show that the microstructure of ZAT10 alloy consists of η-Zn phase and lamellar eutectoid phase of(α+η).From 260 ℃ to 120 ℃,the age incubation per…
The composite ceramic coating was prepared with MgO as the base material by thermo-chemical on the industrial pure magnesium and MB2 surface.The corrosion resistance and wear resistance of the coatings were studied.The results show that the corrosion resistance and wear resistance of the coating increase significantly…
Based on the one-dimensional shock wave theory and the Wasley's shock initiation energy criterion,the process of energetic fragment impacted shielded high explosives is theoretically and numerically analyzed.Fragment styles,fragment sizes and shielded plate thicknesses are considered respectively.The results show that…
Poly(N-vinylcaprolactam)(PVCL) was synthesized based on free-radical polymerization mechanism through solution polymerization,precipitation polymerization and dispersion polymerization respectively,using azodiisobutyronitrile(AIBN) as initiator and N-vinylcaprolactam(VCL) as monomer.The chemical structure of prepared…