An overview of the recent progress in the grain boundarytheory has been presented,including the physical concepts of grain boundarymodel such as CSL,O-Lattice and DSC Lattice.Some experimental techniquesand their applications have been introduced and revi

The modern grain boundary structure theory is a new theorywhich has been developing since the 70s of this century.Some new conclu-sions could be obtained by using this theory to interpret physical phenomenaconcerned with grain boundary,such as grain bound

Different contributions of crystal lattice aud grain boundary onthe hydrogen softening and hydrogen hardening effects in α-Fe were studiedand it was found that the dominate component is still the contribution ofcrystal lattice.Moreover,a new mechanism of

The hydrogen-induced cold work internal friction peaks (H-CWP) in iron based alloys were studied by an acoustic frequency internal fri-ction apparatus.The character of the peaks in different alloys was determined.The activation energy for the peaks and th

The near-coincidence grain boundaries of alpha phase insuperplastically deformed Ti-6Al-4V alloy were investigated with TEM.Itwas found that the image of grain boundary dislocations (GBD) in some ofthe boundaries became diffusive but still maintained line

The elastie-pla(?)stic fracture of pressure vessel steels is a processfrom initiation to stable propagation and to unstable fracture.To study anddesoribe this complex process quantitatively has been one of the importantproblems of engineering fracture mec

The electrochemical permeation technique was used to study thetrapping and transport phenomena of hydrogen in 18 Ni maraging steel.Theapparent diffusivity decreased as the amount and the density of precipitateinterfaces which act as trapping sites of hydr

Fe-Cr-Co-V-Ti alloy of 1.5%W addition is a new varietyof permanent magnets.In this paper,we have studied B_r stability of this al-loy and gained relationships of temperature,external magnetic field,ferromag-netic bodies,time and ballistic force on magneti

The states of hydrogen in α-Fe can be divided into twokinds as a whole,one is room temperature stable state,the other is roomtemperature unstable state.The hydrogen softening or hydrogen hardening ofcrystal lattice is mainly determined by the room tempera

The a-Si:H/a-Si_(1-x)C_x:H multilayers synthesized by RFglow dischargedeposition in a single-chamber plasma reacter have shownlower darkconductivity,higher photoconductivity and apparent S-W effectother than unlayered samples.With decreasing the sublayer

This paper analyzes the optical performance of the solar en-ergy selective absorbing coating with theory of thermal radiation and filmoptics.The simple process on preparation of Al_2O_3 complex coating usingelectrolytic coloured method is described.The ex

The dynamic properties of fibreglass,carbon fibre,kevlar 49fibre composites and their hybrids and epoxy resin have been studied withDMA under flexual dynamic loads in the range from RT to 25℃.It wasshown from this paper that the glass transition peaks of

In the cathode material of stoichiometric V_6O_(13),Ti,W,Cowere used for substitution of a part of V to systhesize compounds of M_(0∶8)V_(5∶2)O_1.On testing Li/M(0∶8)V(5∶2),O_(13) secondary cell,the cathode material of Co(0∶8)V(5∶2)O_(13)exhibites a good

Morphology,thermal transition behaviour and mechanical property ofinterpenetrating polymer network of polybutadiene based polyurethane/polysty-rene were studied.The result of TEM showed that the resulting PU(HTPB)/PSt—IPN formed the phase structure which

The separator is one of the important parts of lead-acidbattery.A soft,bag-shapea Type Ⅱ plastic separator which based on a inter-nally plasticized polymer,was developed.The physical and chemical propertiesof Type Ⅱ separator were systematically measured.