The low frequency internal friction of the pearlitic,bainiticand martensitic transformations in three Fe-Ni-C alloys has been studied.Theresults show that the internal friction of the martensitic transformation is incorrespondence with the model based on

Laser rapid solidification treatment on pure Fe,20 steel andNi-base alloy is performed by means of pulse laser.The results show thatsome epitaxially growing grains are formed in the melted zones of pure Fe andNi.The epitaxially growing grains and fine den

The vector method of texture analysis which can minimizethe required number of experimental pole figures has been applied to the de-termination of the fiber texture vectors.The coefficient matrix σ_(pn)(hkl)was calculated by means of Monte-Carlo method fo

For a free-cobalt Ni-base alloy,it is considered that thematrix is composed of Ni,Cr,Mo and Al,and the σ-phase is composed of Ni,Cr and Mo.Power series model was chosen to express the free energy.Bytreating experimental diagram with data optimum programme

Preparation processes of gas sensor and super fine powder (SFP)iron oxides were studied.The method of complex solution-neutral preciptationcan resonably sythesize SFP iron oxides (d=10—20nm).The gas sensitive and crystal ceramic structure of SEP iron oxid

The fracture sections of metals under loading conditions,cyclicloading,monotonic loading and impact loading have been analyzed by Fourierseries analysis method.The results show that the micro-distortion of fracturesection in cyclic loading specimen is lar

The microstructures of the laser clad zone of Fe-,Ni-,and Co-basecoatings were investigated.A long period lamellar carbide(Cr_7C_3)is found inFe-base clad zone,a large amount of dislocations and the Ni_3Si phases inNi-base clad zone,and a lot of stacking

The effect of batting and vibrating on the magnetic characteristic oftwo permanent magnets was studied.Experimental results showed that themagnetic characteristic was changed at the primary stage and was stabilized atfinal stage.The permanent magnet must

A preliminary investigation of Y-Ba-Cu-O superconductorthin films deposited on different substrate by ion beam sputtering was reported.The experimental results show that this method provides a bette wayto obtain stoichiometric YBa_2Cu_3O_(7-x) superconduc

Domain and glassy phase have been studied by analytical electronmicroscope in YBa_2Cu_3O_(7-x) and EuBa_2Cu_3O_(7-x) superconductor.The compari-son between different performances was made.The results show that in the〔?12〕domain has been observed besides〔0

The structural characteristics of RF-sputtered SiC thin filmshas been analysed by XPS technique.The chemical shift defined bythe relative shift of Si(2p) and C(1s) peaks,as well as the loss energiesof the plasmon loss features observed in the spectra were

An analysis has been conducted to study heat transfer perfor-mance in the fibrous insulations.An analytical expression is presented,whichrelates the effective thermal conductivity with mean temperature,air thermalconductivity,density and extinction coeffi

Careful studies of the generating mechanism for organic and poly-meric materials,the synthese of the selected compounds and the factors influ-encing on second harmonic generation (SHG) powder effect,have showedexceptionally nonlinear optical properties to

Group transfer polymerization (GTP) monomer (acrylonitrile)was reported.It has very high GTP activity and an explosive polmerizationcan be observed.A detail description for acrylonitrle GTP was given.Becauseacrylonitrile is no a good solvent for poyacrylo

The europium and terbium methacrylate Eu(MA)_3,Tb(MA)_3,and octanoate Eu(OA)_3,Tb(OA)_3 were prepared.Either Eu(MA)_3 or Tb(MA)_3with three double bonds(C=C)was used as a cross-linking reagent and octa-noic acid salts were used as additives.An amount of r

The synthesis,morphology and mechanical properties ofsimultaneous interpenetrating networks of PU(HTPB)/P(MMA-co-EGDMA)-IPN were studied.The results show that the relative polymerization ratesof two networks have remarkable effect on the morphology and me

Effect of structure and composition on ultrasonic attenuationand velocity of polymer has been studied by pulse-echo method.Temperaturedependence of ultrasonic attenuation on different polymer materials was mea-sured,the range of measuring temperature was

A free radical copolymerization of isobornyl methacrylate (IB-MA) and methyl methacrylate(MMA)was investigated.The Compositions ofthe copolymers were determined by NMR.The monomer reactivity ratios werecalculated as r_1=0.91 and r_2=0.46.The thermal,optic