Materials Literature
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In order to obtain the influence of various parameters on the damage performance of explosively formed penetrator,grey relation analysis on performance parameters of EFP is conducted by grey theory,taking EFP velocity and divergence angle of MEFP as the reference sequence,and liner and charge parameters as the compare…
The reactive powder concretes(RPC) has the high performance in strength,toughness,the low factor of porosity and the extremely low permeability,which attract the attention of domestic and foreign researchers.The design principle of RPC is discussed;then it is pointed out that the RPC has the advanced characteristics c…
Fe90 alloy was surfaced on low carbon steel by plasma surfacing.The microhardness and wear resistance of surfacing samples test were studied by hardness test and wet sand rubber wheel abrasive abrasion tester.The microstructure of surfacing layer was studied by OM and SEM.The effects of surfacing current on the proper…
by on General boring knife rod and white steel knife boring knife block of using disadvantages analysis,stated has new clip holding white steel knife rod of innovation concept and using skills,makes white steel knife actual cutting utilization by original of 53% improve to 88%,and save has truncated white steel knife…
Brominated isobutylene isoprene rubber(BIIR) is one of the halogenated butyl rubber,besides to keep the characters of butyl rubber,it also adds many merits such as its quicker curing speed,various of vulcanization systems and so on.This paper describes the structure and performance of BIIR,curing systems,production st…
The effects of the mass fraction of NaOH on the hydrolysis reaction of N-vinylformamide-diallyldimethylammonium chloride copolymer(PNVF-DA) were investigated using colloidal titration.The molecular weight(Mw) of hydrolysates(CPND) of PNVF-DA were determined using multi-angle laser light scattering instrument in pH=4.6…
Efficient microbial strains and appropriate reaction conditions are the keys to the bio-transformation of cellulose.Based on cellulose-decomposing microorganisms isolated,we studied synergism of cellulose-decomposing microorganisms and properties of crude enzyme liquid.Results showed that synergism was significant bet…
The corrosion behavior of two hull steels immerged in 0.5 mol/L NaHCO3+3% NaCl aqueous solution was investigated by electrochemical noise(EN) technology and polarization curve method.Distinct pitting characteristics could be observed from EN spectra of the two steels.The results indicated that the duration of pits ini…
The synthesis research of micro-mesopore composite molecular sieves are summarized systematically and various preparing methods are introduced,such as in-situ crystallization,ex-situ crystallization and nanoclusters self-assembly.The in-situ crystallization includes unimolecular templating and bimolecular templating.T…
Different kinds of pre-alloyed metal powder for diamond tools,as well as their manufacture methods,performance characteristics,application fields,shortcomings and development trend are briefly summarized in this paper.Wide application of pre-alloyed metal powder in superhard abrasive industry is an inevitable developm…
Receptors and transporters such as transferrin receptor,low density lipoprotein receptor and glucose transporter are found expressed on the blood-brain barrier.Functionalization of drug delivery systems with ligands or antibodies of these receptors or transporter can enable brain to enhance drug delivery,improve treat…
Pretreatment,detection methods that have commonly used in detecting gallium and their research progress of both at home and abroad in recent years were reviewed,the advantages and disadvantages of them were reviewed also.
Polymerization of norbomene was carried out in the presence of a novel catalyst system:1-methyl-1H-imidazole side-chain functionalized mono zirconocene/methylaluminoxane.Different reaction temperature and Al/Zr mole ratio were investigated.This catalyst shows the highest activity about 104 g PNBE/(mol Zr·h)at 60 ℃ and…
To solve the calculation problems of uneven composite rods and beams by the theory for the even isotropic material rods and beams,from the basic theory for the material parameter of the composite monodirection laminated plate,the theory and method to simulate composite rods and beams in FEA model are discussed in this…
After 2005 C/VGI Technology and Application Seminar,the progress of compacted/vermicular graphite cast iron(C/VGI) in China was summarized.Two new C/VGI national standards and the development of internal combustion engine C/VGI cylinder were introduced.The application of internal combustion engine C/VGI cylinder is pr…
The Bi2VO5.5(BVO) thin films were fabricated on LNO/Si(100) and ITO/glass substrates by sol-gel process,respectively.The structural features and surface morphology were investigated by X-ray diffraction(XRD) and atomic force microscope(AFM).Both the films had a perfect c-axis(001) preferred orientation with a single p…
The effects of heat treatment temperature on microstructure and mechanical properties of TC4 alloy with equiaxed primary microstructure were investigated.It was shown that the microstructure changed first to α+β and then β phase with increasing heat treatment temperature,meanwhile the mechanical property also changed.…
GeSbTe films were prepared by RF magnetron sputtering.Based on the analysis about surface topography and crystal structure of the films,the effect of sputtering power and annealing temperature on internal stress was investigated by atomic force microscopy,X-ray diffraction and stress analyzer.Results show that,the int…
The experimental method of calculation of elastic support beam validity of the model and experiment to determine the structure of elastic support beam ultimate load and normal load.
Li1.2Mn0.4+xNixCr0.4-2xO2(x=0,0.05,0.10,0.15,0.20) were synthesized by spray-drying process,which was named as SD1 to SD5,respectively.Their crystal structures,element valences and the electrochemical performances were investigated by XRD,XPS,ICP,SEM and TEM.All compounds have a typical feature of a Li-rich layered so…