Materials Literature
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Titanium oxide sol is synthesized from inorganic salt precursors butyltitanate,MPMS and acrylic acid by hydrolysis and condensation in water solvent.The thermal stabilities and micro-structure of the PMMA/TiO2 hybrid materials are characterized with TEM,FT-IR,DSC and TG.The studies reveal that the diameter of the part…
The N-In codoped p-type ZnO films with preferential orientation along (002) plane have been fabricated on quartz glass substrates by using radio frequency magnetron sputtering technique of ZnO∶In2O3 powder target and then by combining with N-implantation. In this article, the crystal structure, electrical and optical…
LY12 Al alloy samples were treatedby micro-arc oxidation ( MAO) in silicate electrolyte for differenttime (5, 10, 30, 45, 75 min, and 120 min).The morphologyand electrochemical performance of the micro-arc oxidation filmwere analyzed by means of scanning electron microscopy ( SEM)and electrochemical impedance spectros…
In this paper,LS-DYNA finite element analysis software,in charge of the explosive properties of the same load,cushion material for the buffer after the peak pressure and shock wave attenuation to conduct numerical simulation and analysis. The results show that the reactive warhead fragments Com.B in the use of explosi…
The brazability of SiC particulate reinforced 101 aluminium alloy by means of both furnace brazing in controlled atmosphere and vacuum brazing is studied. Results show that brazed joint with good quality can be got by using the reasonable brazing filler metal and proper brazing flux and optimized brazing technology pa…
To upgrade the thermostability of polycarbonate(PC),various varieties of antioxidants were added to PC.The effects of the variety and content of the antioxidants and that of environment conditions on the thermostability and degradative kinetics of PC were also investigated.The results showed the thermostability of PC…
The fabric with 80NPTT/R/Vblended yarn as warp yarn was removed vinylon,then the fabric of 160N PTT/R was gained.In order to improve the spinnability of 80N PTT/R/V blended yarn,we applied PVA,grafted starch and polyacrylamide mixed size,the result showed that the sizing hairiness decreased by 74.4%,the wear resistanc…
Hybrid UV-cured resins were prepared by using bisphenol A epoxy resin(E-44)and bisphenol A epoxy acrylate(EA)as the main raw materials with monomers and photoinitiators.The structure and properties of the hybrid UV-cured material were characterized with Fourier transform infrared spectrograph(FTIR),dynamic mechanical…
The influences of general emulsion polymerization and soap-free emulsion polymerization on AA/ MMA copolymer performance were compared. At the same time, the influences of the types of redox initiators, oxidant content, ratio between AA and MMA, mix round speed and dripping speed of reductant on conversion of monomer…
The dynamic mechanical behavior of the different heat treated low-alloy superhigh strength steel-30CrMnSiNi2A was studied by using Split Hopkinson Bar technology,the test specimen passed through three kinds of different heat treatment systems,including normalize tempering,quenching at 860 ℃ and tempering at 600 ℃,quen…
By summarizing and practice,the factors that affected the results of end hardenability test of steel included billet sampling,accuracy of heat treatment operation,preparation of end hardenability test sample,Rockwell hardness test and factitious factors.The operation way and skills to improve the test accuracy were br…
On the basis of introducing the anti-subsidy disputes on certain softwood timber product trade between the USA and Canada,the paper firstly analyses the key question and main reasons of the disputes,and then introduces the solution and new issues.Finally,it discusses the impact and enlightenment for China.The paper ha…
Fe3Al intermetallic compound was obtained via vacuum annealing of supersaturated solid solution of Fe(Al),which was prepared by mechanical alloying method in air conditions using Fe and Al with different ratios as source materials and stainless steel balls as grind medium.XRD and DSC analysls show that the amount of A…
The effects of solidification in water glass sand and stainless steel mold on microstructure,mechanical properties and impact fracture of Fe-28Al-5Cr-0.06B alloy were studied. The results show that the microstructure of Fe-28Al-5Cr-0.06B alloy refines by using stainless steel mold cooling method,the tensile strength o…
In order to meet the requirement for high reliability and long service life of space movement mechanisms,hexameth-yldisilazane modified SiO2 was incorporated into MoS2-doped phe-nolic-epoxy resin-based bonded solid lubricating coatings to pre-pare multi-component composite coatings.The resulting compos-ite coatings we…
The foam stability is very important in the successive operation of foam fluids in drilling,and the drainage is the macroscopical representation of foam stability.The drainage behavior and liquid films of foam were studied by using the mesoscale molecule simulation.According to the structures of foam solution,the link…
In this study,effects of aromatic amino acids and vitamins on the growth of transketolase-deficient Bacillus subtilis and D-ribose biosynthesis were studied in chemically defined media.It was found that aromatic amino acids,biotin,pyridoxine and nicotinic acid promoted cell growth,and nicotinic acid enhanced D-ribose…
The paper introduced revise process, thinking, and bases for the YS/T492-2005 standard, and also introduced major technique target origin and formulation situation of the standard with emphasis. It has a guiding function in implementation of the standard.
The microstructure and property of Si-modified high aluminum Zn-based alloys was studied. The results show that there are not only eutectoid (Si+α) but also primary Si phases in the alloys. The polygonal Si phases decrease the mechanical properties of the alloys because combination of the primary Si phases and the mat…
Compared with the draft form based on the common double apron,applying spinning press bar spacer in the drafting zone on the spinning frame can greatly improve the yarn evenness.However,the difference among bobbins and the slub of the spun yarns must be solved by certain techniques.In addition,cleaning work may become…