In this paper, the relative importance of crystal energy and exchange energy of minority charges is discussed. The effects of the environment on the behaviour of minority charge and the characteristics of material, especially on the conductivity are studi

M-A constituent in weld heat affected zone of high strength steel has been considered as a locaf hard zone (LHZ). Two dimensional FE-analysis has been conducted to investigate the stress and sirain fields in the vicinity of the LHZ. Existence of the LHZ e

This paper deals with mechanical properties and structure of superalloy DZ22 with zone melting and liquid metal cooling (ZMLMC) directional solidification process and high-rate solidification (HRS)process. Experimental results show that ZMLMC has more adv

Dynamic tension tests were employed to study the effect of strain rate on plastisity for three metallic materials, strain rate ranges from 10-4 to 103 s-1. A phenomenon of plastisity-increasing induced by high strain rate is found for tested materials, wh

The twin dependent crack initiation characteristics have been studied on Ti monocrystals subjected to reversed push-pull cycling in SEM and polycrystals subjected to alternating bending fatigue tests or reversed push-pull fatigue tests. It is found that i

Melting behaviors of In and Pb nanoparticles embedded in Al matrices were studied by using DSC and in situ TEM observations. It was found that the epitaxially oriented (with the Al matrix) In and Pb nanoparticles could be superheated, while the randomly o

In this report Authors employed the HREM and STM to detect the micro-structure of nc-Si:H films, which are fabricated by the PECVD deposition method. The nc-Si:H films are consisted with a mass of micro-grains and a great deal of interfaces among grains.

The zero thermal expansion behavior of [NZP] ceramics were studied. The crystal structure,anisotropy, atomic composite, microstructure, composite material, design points and utilization of almost zero thermal expansion [NZP] ceramics have been discussed.

A new process of chemical reaction Si+2TiH2+B4C→ 2TiB2+SiC+2H2↑ for preparing TiB2-SiC composites has been proposed. The TiB2-SiC composites were fabricated by reactive hot pressing at 2000℃ under the pressure of 30MPa for 60min in Ar atmosphere. The eff

3Y-TZP ceramics of different sintered densities were prepared and studied of their mechanical properties(fracture strength, fracture toughness and Vicker's hardness). The investigation show that the sintered density not only affect the mechanical properti

Ph(Sc1/2Ta1/2)O3 (PST) ceramics were prepared using columbite precursor method.The samples with highly ordered and highly disordered B-site canons were obtained by suitable heat treatment. The dielectric properties of PST ceramics were investigated. The h

High-temperature properlies of zirconia-toughening mullite ceramics prepared by using electrically-fused mullite are decreased because of more impurities in glass-phases, which contrasts the ceramics done by using high-purity mullite. It is found that thi

A new method (VETO) to prepare humidity sensitive film of Sn-SnOx has been reported.Firstly, pure tin (mass fraction 999mg/g) was evaporated on A12O3 ceramic substrates kept at 150～250℃in a pressure of 1 mPa. The humidity sensitive films could be got afte

The structure of piezoelectric ceramic in Pb[(Zn1/3Nb2/3)(Sn1/3Nb2/3)](Zr,Ti)O3 system was studied by XRD. The effect of added micro element to the lattice constants was also studied.The emphasis was the research of the situation of the samples unpoled an

The high temperature mechanical properties, oxidation behavior, and thermal shock of La-Y-Si3N4 are investigated. The results show that the effevt of glassy phase on high temperature properties is significant, the flexural strength of Si3N4 decreases and

Blends of Nylon 6 matrix (800mg/g) and ethylene-vinyl acetate copolymer (EVA) impact modifier (200mg/g) were prepared by reactive extrusion with compatibilizers with fuctional carboxyl group,included one of ethylene-acrylic acid copolymer (Nucrel) and eth

The process prepared of high tribological properties (HTP) C/C composites was explored,the mode of microstructure of HTP C/ C composites was designed, C/C composites that possess microstructure with spherical deposition carbon on carbon fibre were develop

The structural and toughening mechanisms of nacre from mullusc shell were applied to the biomimetic design and synthesis of two kinds of ceramic matrix composites: Al2O3/Epoxy and Al2O3/Aramid fibre reinforced epoxy laminated composites. Three-bending tes

According to the self-healing regularities of biomaterials, a model of intelligent material with self-repair function is suggested. Experimental samples were made of glass tube embedded cement composite and fibre embedded epoxy resin respectively. It is s

In this paper, three original states of fibers i.e. naturally arranged. fixed with network coating. hybridized with particles in the fiber-bunch preform were studied. It has been found experimentally that incomplete infiltration is existed when fibers arr

The microwave curing of a unidirectional E-glass fiber/epoxy composite was carried out under the curing condition as follows:1kW for 3 minutes without application of pression. The such cured composite has a fiber volume fraction of 56%. It was found that