It is supposed that the correspondent relationship between atomsof the new and parent phases as shown in Bain mechanism exists in themartensitic transformation of Cu-Zn alloys.Applying the known values ofthermodynamic properties and treating the ordering

The driving forces for various possible reactions within the bai-nitic transformation temperature range of Cu-40at.-%Zn alloy have been cal-culatd.The results show that because of the occurence of β→β′ordering tran-sition within the temperature range,the

The carbides of MC formed during solidification of Ni-base sup-eralloys exist in the form of blocky or Chinese-script type morphology.Experiments show that both initial morphology in normal solidification conditionand final morphology near equilibrium con

During dendritic solidification of metal by the Bridgman methoda stable longitudinal sinusoidal vibration with different order of resonant fre-quencys have been applied.The influence of vibration on the morphology ofsolid-liquid interface,structure and me

The effect of Nb and Ce on the interface wettability,interac-tion,structure and combining strength between Al_2O_3 and medium Mn steel wasstudied.The results show that Nb and Ce markedly decrease the wetting angleand make wetting happen.The mechanism of N

The condition of Sb segregation on grain boundaries of Al and itseffect on the structure and mechanical properties have been studied.The effectof adding rare-earth metals on the structure and properties of Al-Sb alloys andits reaction with Sb in the Al-Sb

The paper studies systematically the deposiion at Sb and Pb filmswith an ionized cluster beam set-up.The dependences of the orientationdegree of the grains in the film on the substrate temperature,the ionization cu-rrent and the acceleration voltage are d

A new brass condenser tube containing trace boron has been usedin two power plants for 4—5 years and has showed a higher corrosion resistancethan normal brass tube.The surface film and corrosion products on the tubebefore and after being used were investi

A kinetic equation of process of the internal nitridation below asurface nitride layer was derived.This equation is also applicable to the processof double internal nitridation.The steel 4Cr14Ni14W2Mo was nitrided in gase-ous medium of ammonia.The process

The double torsion method(DT)for mechanical properties eva-luation of brittle materials has been presented.It is shown that DT method hassuch advantages as wide material adaptability and extensive study contents sinceits stress intensity factor(K_1)at cra

Thermal expansion coefficient is an important property of compo-site materials.To predict it from constituent properties is necessary in design ofmaterials and other aspects.On the basis of analysing the behavior of thermalexpansion of composite filament,

On the basis of the rheologic theory and system identificationthe problem on setting up rheologic models of aluminum alloys in quasi-solidis investigated.The microcomputer and rheologic shear apparatus were applied.The processes of setting up the rheologi

The temperature dependence of magnetic susceptibility and electricresistivity of non-magnetic steel 30Mn 20 Al3 was examined.A paramagetic-antiferromagnetic transition about 284K is found and a peak value is presentedat the X-T plot.Below the Néel tempera

The thermoelectric property of rare earth monophosphides at twotemperaure's ranges have been studied.The relation of thermoelectric power co-efficient and temperature have been measured.The activation energy may becalculated from above relation.It is obvi

Bonding characteristics of MC carbides in Ni-base superalloy hasbeen analyzed.The force constant and bond energy of MC carbides are calcu-lated with normal mode vibration according to the result of Raman spectra.Boththeoretical analysls and experimental r

The effect of teragonal-monoclinic phase transformation of zirconiaon high-tempeature strength of ZTA ceramics has been extensively investigated.The dependences of t-ZrO_2 content V_t,transformation free energy change ΔG~cand Young's modulus E_c on temper

The stress-strain behavior of films from a series of two stageemulsion polymers were studied.The emulsion polymers were prepared by poly-merzing methylmethacrylate(MMA),2-ethyl hexyl acrylate(EHA),and 2-hy-droxyethyl acrylate(HEA)in the presence of a perf

The relations of injection charge and frictional electrification inpolyethylene with various contents of VA were studied.The experimentsshow that the injection charges can be greatly decreased and the phenomena offrictional electrification can be eliminat