In this paper,the brief principle of amorphous silicon(a-Si)films fab-ricatedby the photochemical vapor deposition using decomposition of monosilaneand disilane is reviewed.The electrical and optical properties of a-Si filmsand the photovoltaic properties

Much attention has been paid to the technique of superplastic formingwith diffusion bonding(SPF/DB),which is of great potential application va-lues in the manufacturing engineering.In the paper,the progress,featuresand applications of the SPE/DB technique

The experiment results show that there exist equilibrium and nonequilibriumboron segregation at austenite grain boundaries in Fe-30% Ni alloys withabout 15 ppm boron content.A maximum of boron grain boundary segregationappears on isothermal dynamic Curve,

The formation of deiormation α'-martensite for metastable austenite in anFe-Mn-Al-Cr system has been studied by metallography,X-ray diffractionand transmission electron microscope.It has been proved that α′-martensiteformsd mainly by γ(?)ε(?)α′,ε(?)α′tran

The internal friction behavior in a CuZnAl shape memory alloy underequilibrium condition has been studied by a vaccum Kē-pendulum.It has beenfound that there are two peaks at about 240℃ and 345℃ separately in therange of room temperature to 500℃ (f=1.7Hz)

A study of toughening effectiveness and mechanism owing to the improvingof mierostructure morphology has been made with the high strength steel28Cr2MoV as an object.It was found that the impact toughness α_K and fracture toughness K_(ie)were improved rema

The development of plating solution for the deposition of an amorphousCo-W-P coating has been discussed.The results showed that crystallizationof the coating is likely to occur at about 350℃;a precipitation process of theCo_2P phase takes place and causes

The microstructure of 5Ni steel as quenched,low temperature temperedand high temperature tempered have been examined in detail by use of mic-roscopic and electromicroscopic analyzer and M(?)ssbauer spectrum analyzerand X-ray diffractormeter.This work reve

We found that new donor(ND)generation was strongly dependent on theO_i content and promoted by the presence of a large amount of carbon atoms.In addition,microdefects in as-grown crystal also played a very importantrole in ND formatiton.There are three ki

Investigations on mechanical properties at elevated temperatures of twoseries of sintered materials in the Al_2O_3-rich region of the Al_20_3-SiO_2 sys-tem(stresss-train relationship,fracture strength and creep etc.)indicate that(1)for sintered bauxites t

In this paper the structural and physical analysis of boron doped siliconfilms produced by LPCVD are reported.It is found that in these materialsthere are three different structural phase zones:amorphous(a-Si),amorphousalloy(a-Si:B)and amorphous-microcrys