An attempt to simulate the coupled growth of γ-co and Cr_(7-x)Co_xC_3 forCo-Cr-C alloys under laser remelting conditions was made.Several model of simulation wereproposed in the past,the authors of this paper assume that the leading morphology will have t

Solidification behavious and solute redistribution of a single-crystal nickle-basesuperalloy under lateral constraints were investigated.The experimental results show that thereare strong influence on the solidified microstructure,the solute segregation a

The effect of variation of strengthening element contents of Nb,Ti and Al onmicrostructures and precipitation characteristics associated with mechanical properties has been investi-gated.The results show that the γ′ arounded by γ″ morphology obtained by m

The liquid extrusion has been given on the basis of the theoretical research andthe experimental research of liquid forging.It makes liquid metal solidify under high pressureand then undergo plastical deformation,so the alloys structure is changed from th

The undercooling of molten metals is an important aspect of investigation inmetallurgical field.With the high vacuum and high frequence electric-magnetic levitation melt-ing equipment,this article has systematically investigated the micro denuleating proc

The problems being dealt with in this study include the calculation method ofimpact srength for beam specimen,the relationship between maximum impact force and load-ing speed as well as load-stress relation in dynamic case,and the definition of critical i

The MOCVD growth of GaAs/Al_xGa_(1-x)As quantum heterostructures(in-cluding superlattices,quantum wells,double barrier resonant tunneling diods)are reportedin this paper.The interface structures of the epilayers are characterized by cross-sectionaltransmi

Diamond films were synthesized on TC4 Ti alloy and Si(001)substrates bycombustion flame method in the atmosphere.The films obtained were characterized by scanningelectron microscopy and laser Raman spectroscopy.The results indicated that the structure and

The weatherabilities of ZBAY glass coated and uncoated with MgF_2 film wereinvestigated by using IRTS,IRRS,SEM and EDAX,comparing the corrosion resulting fromweathering with that resulting from water solution,Experimental results found that their cor-rosi

In this paper a new approach to characterize the tensile modulus of highly ori-ented polymers(ultra high molecular weight polyethylene UHMWPE)was proposed.A newcorrelation between the tensile modulus with the processing condition and the primary structure

In this paper a new model theory of tensile strength for self-reinforced polymerswas derived from the theory of stress-induced crystallization and of chemical reaction rate acti-vated by stress.A new correlation between the tensile strength with the proce

This paper introduce preprare,propreties of SP starch plastic film and put touse.Nowadays this film is a new polymeric functional material.As its raw materials is rich,itsselfdegrabilityis better and its cost is cheaper.Starch plastics provide reliable pa

Rolling deformation of SiC_w/Al composite has been studied in the present investigation.The experimental results showed that the rollability of the composite was improved greatly by extrusion andit was suggested that the as-extruded composite should be ro

The axial and lateral compressive resistance of aluminium alloy tube are in-creased obviously after the winding of carbon fiber on its external surface.Especially for thetube with large length-to-radius ratio,its flexural resistance under axial load and i

This paper has systematiclly studied the new technology of gaseous surfacetreatment of carbon fibers.After treatment,the tensile strength and tensile modulus do not de-crease,but its surface free energy and functional groups increase obviously and surface

The α for different sintered glass-ceramic matrices in Li_2O-Al_2O_3-SiO_2andLi_2O-MgO-CaO-Al_2O_3-SiO_2 systems were studied.Some glass-ceramic matrices with appro-priate thermal expansion coefficient which can be used for preparing C-fibre or SiC-fibre