Materials Literature
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The ultra-fine powder was prepared by mechanical alloying (MA),and the Al2O3-TiB2 composite ceramic coatings were prepared by solid sate reaction method on Q235 surface.The phase composition of powder and coatings,particle size,coatings cross section were studied by X-ray,Laser particle size analyzer,SEM and DTA.And t…
The powders of Ce 0.8 Sm 0.2 O 2-δ (SDC)and La 0.7 Sr 0.3-x Ca x Co 0.9 Fe 0.1 O 3-δ (x=0,0.1,0.2,0.3) (LSCCF) were synthesized by the citric acid sol-gel method.The powders were characterized by TG-DTA、XRD and TEM.The electro synthesis ammonia cells were made up using LSCCF powders as cathode,Ni-SDC as anode and Nafi…
According to the microanalysis of the contact materials after arc erosion,arc erosion morphology features is found.That is molten droplets,void and erosion pit.And the greater diameter of tungsten and content of Cu is,the bader is its erosion.
N-lactosam-O-histamine acylated carboxymethyl chitosan was synthesized by lactose groups and histamine grafted with O-carboxymethyl chitosan;the pH-sensitive nanomicelles were prepared by the probe ultrasonication method;the release behavior of the drug-loaded nanoparticles was studied by the dialyzer method.The resul…
The flat filament would be distorted since natural twist in let-off processes.The research and application of weft Let-off device for flat filament could help to reduce flat filament's distortion.The thesis compared using weft Let-off device of flat filament fabrics and non-using weft Let-off device of flat filament f…
Composites were fabricated using epoxy as matrix resin filled with low-melting-point alloy by phase inversion and direct dispersion method.The effects of alloy contents and compounding conditions on dielectric properties in the composites were studied.The results indicated that the key to prepare dielectric composites…
The synthesis methods of m-xylylenediamine were introduced in this paper,especially the technology of synthesis m-xylylenediamine by catalytic hydrogentating isophthalonitrile in the presence of raney nickel catalysts and raney cobalt catalysts were discussed.Application of m-xylylenediamine in epoxy resin field,polyu…
γ-La2S3 polycrystalline pellet were prepared by hot pressing method with the γ-La2S3 powder synthesized by the gas-solid reaction.The phase of powders with different dopant concentration of Ca2+ was studied.The effect of sintering temperature and sintering time on the infrared transmittance of polycrystalline pellet w…
A simple simulation device is designed,which can be used to dynamically show the characteristics of single-layer film,as well as the influence of film thickness changing upon antireflective effect.
Two kinds of Co-rich magnetic amorphous films of CoFeB and CoFeSiB of different components are prepared by magnetron sputtering and applied as ferromagnetic electrodes in magnetic tunnel junctions(MTJs).In bulk material,CoFeSiB shows softer magnetic character with only 1.25×10-2 A/m coercivity compared to that of 2.51…
The tritium fuel cycle of the liquid metal blanket is a core technology for the normal operation of a fusion reactor or a fusionfission hybrid reactor.The tritium fuel circulation system consists of the tritium purification,the tritium extraction,the tritium storage,the tritium measurement,the helium/water cooling and…
The magnetic leakage field in HTS transformer decreases the critical current of winding and increases the AC losses.Because of the anisotropic properties of the HTS,the behavior of the radial stray field is the crucial factor for critical current degradation and AC loss increase.So,the leakage magnetic field,especiall…
The two types of free-cutting steel were studied.The chemical composition was determined by ICP-AES,the morphology of microstructures and inclusions were investigated with the help of metallographic microscope.At the same time,the inclusions were analyzed by using SEM and crystal structure analysis was got by XRD.The…
Zn-Fe alloys are electrodeposited in light acid solution containing zinc chloride and(NH4)2Fe(SO4)2.The bath is steady,and no position appears in 15 days.The effects of additives and current density,temperature,pH on the surface and the composition of Fe in the electrodeposits are investigated.It shows that the Zn-Fe…
Chemical vapor deposited (CVD) diamond film has bright application foreground in many high-tech fields for its a series of outstanding properties. The temperature field distribution of CVD diamond film laser drilling process is different from other materials because of its diamond graphitization taking place during th…
The defects in mechanical properties for PTFE(polytetrafluoroethylene) limit its applications.TiO2 modified polytetrafluoroethylene(PTFE) composite materials were prepared by adding TiO2 particles into the PTFE.The mechanical and tribological properties of the composites were investigated.The results indicate that the…
The effects of heat processing on electromagnetic shielding properties of composites based on Fe73.5Cu1Nb3Si13.5B9 amorphous powders/butyl rubber were investigated.The results show that the best electromagnetic shielding properties of composites have been obtained at 350℃ for 1h in the state of amorphous,the shielding…
By sputtering alumina on the surface of silicon which was anodic alumina oxide(AAO) films were prepared by two-step anodic oxidation technology.The effect of electrolyte,anodic oxidation time and expanding time on the pore structure were studied.The results indicate that(1) compared with sulfuric and phosphoric acid,t…
In order to accurately detect the permanent set strength of incoming titanium alloy raw materials and realize programmed automation control test,the permanent set strength of ZTC4 titanium alloy was tested by unloading method according to the relevant regulations from GB/T 228 - 2002.Affecting factors such as cycle nu…
(1-x)Ba0.998La0.002TiO3-xBi4Ti3O12(0.001≤x≤0.03) ceramics were prepared by solid-state reaction technology via different prepared processing(one-step: (1-x)Ba0.998La0.002TiO3-xBi4Ti3O12 were prepared from the powder of Bi4Ti3O12(BIT),La2O3 and BaTiO3; two-steps: first,Ba0.998La0.002TiO3 was made from the powder of La2…