High strength aluminum alloy is mainly traditional alloy hypoeutectic composition, containing the solid solubility of alloy elements atomic fraction is greater than 2, and reached the alloy trengthening effect by the precipitation of intermetallic compounds in the process of aging. But in more than 150°C, the precipitated phases coarsening, the material performance dramatically, thus limiting its use scope. In the preparation process, the planar flow casting process will melt thrown by 35-80um thick slices with, because the cooling speed can reach 105K/s the process of melt, so the microstructure is very fine, after extrusion. Grain size of about 1um, precipitates spherical and uniform distribution, the size of about 50nm, Al12(Fe,V)3Si phase coarsening rate is low, so the alloy has comprehensive mechanical performance and excellent high temperature stability.

Microstructures and mechanical properties of Mg-10Gd-3Y-2Zn-0.5Zr alloy were investigated. Three kinds of phases including Mg, Mg3(GdYZn) and Mg12(GdY)Zn were found in the as-cast alloy. Two different patterns of the long-period stacking order (LPSO) phases including lamellar structure and block-like structure were observed in the homogenized alloy and both of them were identified as the phase of Mg12(GdY)Zn. After extrusion with ratio of 10:1 under 420°C, fine dynamic recrystallized grains were obtained and its average size was only about 4μm. The alloy exhibited excellent mechanical properties by hot extrusion and heat treatment. The ultimate tensile strengths of the as-extruded and peak-aged alloys were 415MPa and 480MPa, the tensile yield strength were 335MPa and 410MPa, the elongations were 16% and 13.5%, respectively. The high mechanical properties were mainly attributed to the combined effects of fine grains, LPSO phases and the dispersed precipitates.

The 3003/4004 clad slabs are prepared by direct chill continuous casting. The microstructures on the interface are investigated by optical and scanning electron microscopes, chemical composition distributions across the interface are detected by EPMA, and tensile strengths are evaluated by MTS NEW-810 Materials Test System. The results show that 3003 alloy and 4004 alloy are metallurgical bonding on the interface on the interface, which is results from fusion and diffusion bonding. The thickness of diffusion layers is about 30 μm on average. The tensile strengths of the top, center and bottom regions of the bimetal slab tend to be uniform. The tensile properties of the interface for 3003/4004 clad slab are better than that of 3003 alloy.

The conventional study of NOx removal is mainly concentrated on the various chemical reactions, but takes no account of the important effect of temperature increase caused by the discharge. In this paper, we present a method whereby the reactive temperature in reaction region can be easily measured without affecting the discharge. By measuring the reactive temperature, it is revealed that the temperature in reaction region is closely related and linearly enhanced with the discharge power, and that the catalysis is not the main reason for the reactive temperature increase. By the investigation on the temperatures effect on the NOx removal, it is found that the NOx removal rate increases with the rise of temperature in reaction region. Therefore, the NOx removal is tightly related with the temperature in reaction region that can be controlled by the discharge intensity under the various ambient temperatures.

The copper nanoparticle at castor oil coated graphite-epoxy solid electrode soft intersurface was studied by cyclic voltammetry. The growth process follows a sphere particle growth process described by an exponential function with parent first order rate constant of 0.00341 s-1. The soft water-immiscible electrode surface tends to produce spherical particles. This study may be useful for the electroanalysis, and offers a new way to prepare a spherical nanometal particle.