In view of the investigation on the mechanical properties, such as yield stress, microhardness,especially of the phenomenon that the above properties deviate from the normal Hall-Petch relation, several interpretations concerning this abnormal effect were

Nanocrystalline Ag-Cu alloy. synthesized by evaporating Ag-Cu master alloy in inert gas and in situ compaction. was studied by means of X-ray diffractometry. Experimental results reveal that the as-synthesized n-Ag37Cu63 is composed of Ag-rich and Cu-rich

The corrosive wear rates of 40Cr steel and 304SS in 3.5%NaCI solution were measured experimentally, the corrosion rates under wearing and steady state respectively were also measured with Tafel method as well as the polarization resistence technique, and

The authors measured the change of ultrasonic attenuation in Al-0.021wt% Cu alloy during push-pull fatigue process and obtained a result different from that of other researchers, and explained this change with the movement of bowing, returning and slippin

An investigation has been made of the nucleation and growth characteristics of the pseudo-dendritic γ' precipitates in a single crystal nickel base superalloy which is directly aged after homogenezing and solutioning at high temperature. The results show

(TiyNb1-y)Cx solid solution with TiC-5wt% Nb. TiC-10wt%Nb. TiC-15wt%Nb system powder has been prepared by mechanical alloying. It has been compared with (TiyNb1-y)Cx. solid solution by arc melting method. The results show that ball milling bine increases

Since the performance of the diabasic alloy-Hg1-xCdxTe Crystal is very sensitive to its composition as well as the component distribution, Bridyman method is usually used for the crystal growth. The flotation-driven convection in the melt has an important

Impact resistance was defined as the buffering capacity of materials, it mainly depends on two kinds of material behaviour. The first is crack-extension speed, the lower the speed, the higher the impact resistance. The second is limit strain of materials.

Single crystal fibers (SCF) have the intrinsic attributes of both crystal and fiber. The properties of SCF, like that of bulk crystal, can be affected by the dopants distribution to a great extent. In this work the sampe of single crystal fibers, Nd3+: YA

Ba1-xPbxTiO3 nanocrystals were synthesized by stearic acid-gel method (SAG), using stearic acid, lead acetate, barium stearate and terabutyl titanate as raw materials. The synthesis temperatures were lower than the formation temperature of perovskites ox

12mol% Y2O3-ZrO2 ultrafine powders were preparated by co-precipitating method in this paper. It was investigated that the particle size, linear shrinkage and property of heat conduction of the powders were affected by calcined temperature. Wherein the oth

A new hot-wall quartz MOCVD reacter has been developed, which overcomes the drawback of foregoing decomposition of metalorganic source gases and suits for continuous preparation of YBCO superconducting tape on metal substrate. Experiments on preparation o

A single NiAl phase and(NiAl+Ni3Al) two-phase intermetallics were successfully prepared by means of hot pressure reaction sintering method. The microstructures and compressive mechanical properties at room temperature also were preliminarily investigated.

The specific heat from 350-970K and the thermal diffusivity along different major crystallographic axes from 630-970K of Li2B4O7(LBO) single crystal have been measured by DSC and laser thermal diffusivity method respectivitly. From the experimental result

The H+ sensitive behavior of Ta2O5 has ben reported on the letter. The magnetron-sputtering method was chosen for the Ta2O5 membranedeposition. C-V measurments of MIS structures were uesd for evaluatingthe stability of the membranes. It is shown that the

The mechanical properties of several PUR foams of different densities have been investigated by low speed compressive tests. Cell structural characteristics and its size ate also determined by SEM analyses. According to stress-strain curves obtained in ex

The study on the miscibility of meta-nitroaniline with polymethyl-methacrylate were carried out in this paper. With the method of non-equillibrium, transperant thin films were obtained which mNA supersaturated in PMMA. And through optimizing technical var

According to a contact theory of Bousinesq spatial problem, a micromechanical model has been built to analyse the axial effective stresses in microstructural element of discontinuously reinforced metal matrix composites(DRMMCs), and a coordinate equation

According to the previous researches on corrosion of discontinuously reinforced Al alloy matrix composite, the role of reinforcement / matrix interface in corrosion is nothing but a preferable site for pitting initiation. The interfacial preferential diss

The fatigue behavior of SiCw / 3Y-TZP under cyclic compressive load has been investigated.The application of cyclic compressive stresses used to single notched samples of SiCw / 3Y-TZP can lead to stable mode I crack growth along the plane of the notch in

The non-isothermal sintering with a heating rate of 10℃ / min to the end temperatres of 700,800, 850, 900, 950 and 1000℃ was studied. The porosity, density and pore size distribution were determined by Archimedes principle and mercury porosimetry, respect