An investigation has been made of the effect of Zr on the solidification behavior and stressrupture property in a directionally solidified DZ38 superalloy with extremely lower content of zirconium.The results show that Zr can seriously affect the solidifi

The models and methods recently developed by the authors to predict fatiguebehaviour of metals at low temperatures are summarized in this paper.They include thermalactivation model of endurance limit,fatigue formula under cyclic strain,expressions of fati

Under the isothermal and linear heating conditions respectively,the thermal sta-bility of 3-dimensional metallic glass Ni_(68)B_(21)Si_(11) produced by rapid quenching denucleated melt(RQDM)has been systematically studied by means of PE DSC7 differential

Solid state reaction between crystalline Ni and amorphous Fe_(78)Si_(12)B_(10) powdersduring mechanical milling is investigated in this paper.For the powder mixtures with contentsof 17at.-% and 30at.-% Ni,the reaction results in the formation of new amorp

The Ni/Ti multilayers was produced through repeated cold rolling of coatedNi/Ti powders.The isothermal-annealing-induced solid state amorphization in themultilayers was studied by means of XRD,SEM,TEM and magnetic analysis.Atransient-nucleation model was

The structure and microstructure of Cu-Fe powder mixture with different com-position during different milling time were analyzed by X-ray diffraction and electrondiffraction。The results show that under the conditon of high energy milling,the solid stateso

In this paper,formation of amorphous alloy Ni_(50)B_(50) prepared by mechanicalgrinding was investigated.J-M-A equation was phenomenally used to describe this formation.

This paper expounds the basic principle of obtaining magnetic recording materials by meansof aluminium oxidating electrodeposition method,studies the new method of depositing magnetic metalsand its alloy in aluminium alternating oxidating film,and prepari

Isotropic pitch-based carbon fibers have a structural heterogeneity.Two phasewere distinguished,viz.crystalline graphite phase and amorphous carbon phase.Crystallinegraphite phase is made of sheet-like,randomly preferred crystallites which loosely entangl

Nanometer-sized TiO_2 powder was prepared by a sol-gel method.Changes instructure and particle size of the powder with temperature were investigated by TG,DSC,XRDand TEM experiments.The as-prepared dry gel and the powder heat treated at 150℃ wereamorphous

Image storage is first achieved according to micro-macro domain transforma-tion theory.In comparison to the PFE image storage in bulk PLZT ceramics,its device is com-patible with IC for its storage only at very low electric field.

The complex dielectric constants of VDF(52)/TrFE(48)andVDF(47.5)/TrFE(47.5)/HeFP(5)in the range of-120-40℃,10~(-2)—10~4 Hz were measured bythe improved dielectric relaxation spectrometer.Because 5mol% vinylidene fluoride(VDF)wassubstituted by hexafluoro-p

Biomedical properties of medical polyurethane at surface were improved in va-rying degrees and some chemical bonds at surface were broken up after Si~+ implantation。Atthe same time,the number of radicals was not beyond a scope of 10~(12)—10~(14)/cm~2 andm

The mechanical response and the critical events in the damage process that mightbe taken as bases for structural design will be discussed.For the case of static loading:(1)Thethreshold strain of the constraining plies ε_(FPF) increases with the constraint

The microwave reflection and absorption effects in epoxy matrix composite ma-terials containning lossy substances and nickel coated carbon fiber resonator have been studied.Based on frequency scanning test,it has been found that transformation of absorpti