In situ observation of non-steady state process of interface pattern formation during unidirectional solidification were performed by using a typical transparent model alloy system------succinonitrile Time-dependent development and history-dependent stead

The influence of interfacial speed and temperature gradient on directional growth of Al-Bi in-situ composites was studies by zone melting and liuqid metal cooling technique. It is found that only at very slow growth rate can a composite structure be forme

The microstructure and high temperature stress rupture properties of a nickel-base single crystal superalloy NASAIR100 cast in both high and low thermal gradients have ben investigated comparatively. It was found that the high thermal gradient casting enh

Nucleation rate in disordered media (include melted metal and metglas) is calculated by using classical thermodynamics and electrodynamics. The results show that the nucleation rate has an exponential relationship to the pulsing electric current density.

The ultrafine Ni powders with an average particle size of less than 20 nm can be prepared by hydrothermal reduction with hydrogen from the Ni(OH)2 slurry which was obtained by mixing the solutions of NiSO4 6H2O with NaOH. The NaOH amount was so adjusted t

The characteristic and microstructure of rapidly solidified Ti-25Al-10Nb-3V -1Mo (a.%) powder prepared by gas atomizing have been studied in this paper. The powder atomized with gas pressure larger than 8MPa is logarithmic normal function of particle diam

The distribution of trace Si (400 ppm), which was doped intentionally in raw tungsten powder, in W-7Ni-3Fe heavy alloy as well as the behavior of the impurities during the liquid phase sintering were investigated by scanning electron microscope and electr

Experimental studies by using differential thermal analysis (DTA) and micrograghic electro-probe method (MEM) in a cobalt-base superalloy have been carried out to,establish the critical variation criterion of initial melting point (Ti) changing with minor

A synthetical mathematical model describing the collision coarsening of the second phase droplets in the liquid-liquid temperature range of monotectic alloys has been put forward. Numerical simulation has hen carried out for Zn-Ph alloy. It was found that

The large area temperature field was formed through large area planary arrangment of parallel W filament arrangment. and the temperature distribution of temperature field was measured. The results have shown that an uniform temperature region of 70×70mmwi

In order to decrease the overpotential for oxygen evolution reaction of PbO2 electrode. investigation of preperationof PbO2 electrode in electrolyte solution with the presence of additive and their perfomances were carried out. The results show that throw

Using sol-gel method. Al2O3 thin film have ben prepared on Al wafer with electrophoretic technique. The principal parts of the films are non-crystalline solid.and there are a little small crystallites in the films.The amount of crystallites increases with

The effect of crystallite size and Y. Ce dopants on phase structure of nano-sized ZrO2 powders has been investigated by XRD and TEM methods. The results show that the volume fraction of m phase is less than 20% at room temperature for pure Zro2 powder wi

In order to prepare thermoplastic starches.water and glycerol were used as plasticizers. and their influences on the processability were studied. As a result. aproposed model of the starch molecular transitions during the extrusion was given.The mechanica

The differential equations about shear and bulk moduli of foam plastics have been derived by differential scheme of composite mechanics. And the couple equations have been solved by using the relation of elastic constants for isotropic foam plastics. The

The influences of the residual stress. adhesive properties and adhesive content on the fatigue crack growth of the super-hybrid composite ARALL have been investigated, and the delamination with the crack propegation has ben analysed in this paper. The res

The thermal expansion behavior of CF/Al composites fabricated by hot-pressing and squeeze casting processes were investigated. respectively. The thermal expansion coefficeient of the composites varied with fiber volume (Vf), forming pressure as well as te

The influence of the volume percent of graphite and polymer(PVA)on the electromagnetic interference shielding effectiveness of the Graphite-MDF cement composite was investigated. The results show if the volume percent of graphite is over 18v.%. S is about