Materials Literature
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The orientation of pre-oxidized PAN fiber(POF) was one of the critical factors which could determine the performance of subsequent carbon fibers.The POFs treated at 240,260,280,300℃ were processed in a steady-state high magnetic field for 10min,30min,50min respectively.And the magnetic field was generated by PPMS.The…
This passage uses the essential work of fracture(EWF)and notch impact strength to evaluate the influence of TGIC on fracture behavior of PBT/POE blends under the effect of tensile stress and impact stress.The results indicate that when POE is added by 5 phr TGIC,the interface bonding between PBT and POE will be improv…
The effect of RE modification on the microstructure and properties of new medium carbon CARMO die steel was investigated,and the characteristic of microstructure and properties of cold work die were studied by using metallographic,EDS and hardness analysis instrument in as-cast and heat-treated condition.The results s…
Dynamic behavior of tungsten alloys under impact loadings was investigated by using numerical simulations.Three dimensional finite element unit cell models with typical micro-structure of tungsten alloys were established.The dynamic mechanical properties of tungsten alloys under tensile loadings were investigated by n…
Porous composite oxidation coating containing calcium and phosphorus was prepared on the pure titanium surface by microarc oxidation technology.Effects of the electrolyte composition on morphology,chemical composition,phase composition and bioactivity of the oxidation coating were analyzed by SEM,XRD and EPMA.Results…
Wood samples were treated by N2 and O2 cold plasma for 5 minutes with the treatment power of 300W.The treated samples were bonded with Melamine Urea Formaldehyde resin(MUF) to test the bonding performance.The results showed significantly reduced surface contact angle and increased surface free energy of the treated sa…
Y3+-doped ZnO films were fabricated on glass substrate by sol-gel process.The structural and photoluminescence characteristics of the Y3+-doped films were analyzed by X-Ray Diffraction(XRD),Scanning Electron Microscope(SEM),and UV spectrophotometer.It is indicated that it is feasible to prepare Y3+-doped ZnO films wit…
The paper presented some fundaments of DDS cooking.It will help people understand the DDS process deeply.
A slurry containing silica sol particles,oxidant,complexing agent and lubricant agent was developed in final polishing of hard disk Ni-P substrate to realize high material removal rate(MRR) and atomic level roughness smooth surface for more rigorous demands of hard disk.The effects of slurry ingredient on polishing pe…
With biphenyl,acyl chlorides from C2 to C5 as reactants,by the methods of F-C acylation,Huang Minglong reduction,acetylation reaction and bromoform reaction,4 of bicyclic aromatic acid terminal with alkyls from C2 to C5 were synthesized.The target products were characterized by gas chromatography-mass spectrometry ins…
OBJECTIVE To evaluate the preservation life of the previously assembled,primed and debubbled cardiopulmonary bypass(CPB) circuits in operating room.METHODS Five closed CPB circuits were assembled,primed with 2.0 liters of Plasma Lyte A solution and debubbled using aseptic technique and then were stored in the ten thou…
Silicon nitride ceramics were obtained by gas press sintering(GPS) with PR,and effect of residual carbon from PR thermal decomposition on pore distribution,microstructure and mechanical properties of silicon nitride was studied.The results show that: the residual carbon from PR thermal decomposition decreases relative…
The ability of the binder to hold diamond grits is an important factor that affects the machining performance of hydrophilic fixed abrasive pad.In this research,K9 optical glass was chosen as the work-piece and unsaturated resin as the binder of the pad.The diamond grits were coated with nickel oxide to improve their…
The CaCu3-xMnxTi4O12 ceramics with x=0,0.2,0.4,0.6,0.8,1.0 were prepared by solid state reaction method and the dielectric properties were analyzed and discussed in this thesis.The studied results shown the MnO addition can be helpful to form the CaCu3Ti4O12 phase and the ceramic grain size was smaller for the case of…
A Zn-SiC composite coating was prepared on steel sheet by adding silicon carbide to the general chloride zinc plating bath. The effects of current density, temperature, as well as mass concentrations of SiC and NH 4 Cl on the corrosion resistance and microhardness of the composite coating were studied. The optimized p…
Adding calcium carbonate fillers in paper products can save energy and cost,improve paper properties,and increase productivities.However,precipitated calcium carbonate(PCC) fillers cannot be used in acid and pseudo-neutral papermaking and have negative impact on sizing.In this paper,alkenyl succinic anhydride modified…
Wear behaviors of AZ91D and AM60B magnesium alloy under different ambient temperatures were studied.Results show that wear rates of two magnesium alloys experience similar trends upon loads under different temperatures.Wear transitions from mild wear to severe wear occur and the critical loads reduce with ambient temp…
The self-assembly technique of a single-stage emulsion polymerization was employed for preparation of three-dimensionally ordered polystyrene colloidal crystals with high efficiently.Three-dimensional ordered polystyrene colloidal crystals of 180 nm~320 nm were prepared by this method,and the polystyrene microspheres…
In order to study the genetic of yellow and green cocoon color,the economic traits,cocoon color and sericin content of parents Dazaolv,Huangbaixian and their hybrid were investigated.The results showed that the heterosis rate of the dead worm rate of the hybrid(Dazaolv × Huangbaixian) F1 was the highest with average 7…
ZTA(Zirconia toughened alumina)composite ceramics were prepared using a low-toxicity monomer N,N-dimethyl acrylamide(DMAA),mass ratio of Al2O3 to ZrO2 is 3∶1,the solid loading of suspension is 50 vol%.The effect of dehydration mode on the dehydration rate and property of green body were discussed.The effect of differe…