The investigation on polyimide and its blends is reviewed. The effect of chemical structure of polyimide on the miscibility, crystallization and mechanical properties of the blends is discussed.

The methods of surface treatment of carbon fiber were reviewed,such as surface purging treatment, gas-phase oxidative treatment, liquid-phase oxidative treatment, surface coating treatment and plasma treatment. Characterization of CF surface after surfac

The texture analysis in thin films and coating materials has suffered some difficulty due to the broadenling diffraction peaks, strong defocusing effect and severe stochastic errors of measured pole figures.Based on the prirciple of maximum entropy and th

The kinetics of serration in Al-Li single crystalsis studied. The results showthat frequency and ampliitude of serration varies with the aging conditions. The deformation temperatures and the crystal orientations of loading axes. The changs of frequency

In this paper,cyclic twins in high purity single titanium crystal and commerical purity titanium were observed with TEM and OM. It is showed that twinning was an important deformation mode.Twinning occured in single titanium crystal with almost all orien

A detailed morphological study was made of the microstructure of a new drill steel 40MnMoV normalized nom 900℃,using IEM and other experimental methods.As with me case of 55iMnMo,another Si—Mn—Mo drill steel,a complex microstructure consisting of carbide

The microstructure and properties of boron deoxidized copper were investigated by EMPA, SEM, XRD etc. The results show that with the increase of adding boron to copper, the amount of inclusion Cu2O decreases;the strength and hardness of copper decrease, t

The initial stage of ion beam sputtered Ni and Ti film has been investigated in situ using AES .The results show that the film growth model of Ti and Ni films sputtered on Si single crystal (100) surface are FM model i.e layer by layer growth model. The f

危開3Al合金硼原子占位及晶界偏聚##2@李卫民,张迎九,唐仁正,谢佑卿$广东工业大学,中南工业大学##3依据LI2型金属间化合物八面体,四面体间隙的特点,并利用硬球模型计算了上述各类间隙的空球半径大小,发现Ni3Al合金中6Ni八面体间隙空球半径比其他间隙大,使硼原子更易进入6Ni八面体间隙由于富Ni-Ni3Al合金晶界比富Al-Ni3Al合金有更多的6Ni八面体间隙,所以硼在富Ni-Ni3Al晶界偏聚较多另外富Al-Ni3Al合金晶界原子间作用力比富Ni-Ni3Al合金晶界原子间作用力大,这也阻碍了硼

In this paper, the mechanical alloying process of two intermetallic compounds of the type B2 FeAl and FeTi has been investigated.It is found that FeAl forms a chemical-disordered solution, but FeTi exists in a structural-disordered noncrystalline state un

The compositional relationship between WC-phase and μ1-phase (Co3W3C) in WC-Co cemented carbides was inferred according to the conservation of W element in the liquid-phase sintering process, and then the expression of relative K value between WC-phase an

On the basis of species conservation in mushy zone, a species conservation equation, which contains solute diffusion in solid phase of mushy zone at any degree, has been developed to modify the Model deduced by Bennon and Incropera.

Polycrystalline Cu2O films were galvanostatic electrodeposited onto 430 stainless steel substrate and were characterized by X-ray diffraction and scanning electron microscopy. The effect of bath temperature on the phase composition, grain size, and surfac

Large single crystals of Mn5+:Ba3(VO4)2 up to 45mm in maximum diameter and 50mm long were grown by the Czozhralski method. Characterization of crystal grown and morphology were described.The main imperfections included in the crystals were the micro inclu

Diamond films have been synthesized by LCVD through combined effect of ultraviolet XeCl laser and infrared CO2 laser. The substrates are Si wafers. A special apparatus has been developed. The deposition conditions have been studied. Raman spectra of the f

Carbon nitride thin films have been prepared by reactive ionized cluster beam (RICB)technique on Si(100)and NaCl(100) substrates, using low molecular weight polyethylene as evaporation material and ammonia as reactive gas. As revealed by transmission elec

A sol-gel method for the preparetion of doped ZnO varistor nanometer powders was described.The influence of the ZnO nanometer powders on the microstrue, the nonlinear parameter,the breakdown voltage, and the dielectric properties of ZnO varistor was inv

The rare earth luminescence materials LaOBr: Tb3+Dy3+ were synthesized with high temperature,and the structure and luminescence characteristcs were studied. The codoping Dy3+ may makes the energy of 5D3 of Tb3+ transfer to 5D4 level, which makes the emmi

In this paper we have prepared controllble surface cracks on glasss pecimens and measured the extension data along crack length. By themethod of crack extension resistance curve a numerical simulationon the surface crack extension is made and the data

The ZnS:Mn nanocrystalline powder and sol were prepared by the coprecipitation method.The excitation and luminous spectra of samples were measured by fluorescent divide spectroscopy(FDS).The optical properties and the luminescent sites of the samples were

In this paper, curable acrylate polymer is selected as the information-duplicated mainal for CDs, its absorption coefficient at 780nm is measured and thermal analyisis such as TGA and DSC is also held. With the theory of heat absorption, the temperature f

The glass transition behavior of various polyepichlorohydrin-based polyurethane/ polystyrene interpenetrating polymer networks [PU(PECH) / PSIPNs] was studied by the means of DSC and dynamic mechanical spectroscopy. The results show that when the PS conte

The cuticles of some typical soil animals were investigated by SEM. The wettability and the mechanism reducing soil adhesion of soil animals' unsmooth cuticles were analyzed in theory. Bionic composite coatings prepared on the basis of this mechanism can