Advanced Materials Research Vols. 538-541

Abstract: Through the facilities imitating experiment of film hole irrigation with nitric acid potassium solution under different film hole diameter, the content of soil water and nitric nitrogen was determined and analyzed in the different time after irrigation. The result shows: the content of soil water and nitric nitrogen under different film hole diameter reduced with time and achieved the maximum at the center while it is reverse away from film hole; soil water content decreased with the increase of film hole diameter at the same position while the nitric nitrogen content was opposite. The influence of the increase of film hole diameter on soil water and nitric nitrogen distribution is harm for plant to absorb water and nitric nitrogen, so it will be better to reduce the film hole diameter in the agriculture production. The result provided the proof for the sustainable development of facilities agriculture and evaluating the effect of nitrogen on environment.

Abstract: Based on various combinations of ACs of the slider and disk, the influence of ACs, were investigated by researchers. In the present paper, the static characteristics of air bearing film with the linear ACs are investigated. Pressure distribution and shear stress distribution are obtained by solving the free molecular MGL equation numerically by a mesh-free method, called Least square finite difference (LSFD). The simulation results show that with different ACs the shear stress and pressure are different, and on shear stress the influence of AC of slider is more obvious than that of disk in close to disk read-and-write head.

Abstract: In view of the Membrane Bio-Reactor(MBR)'s common energy consumption and higher operating costs in domestic and overseas, we designed a solar MBR process, the design process is using solar energy to directly carry out the thermal conversion, and complete membrane bioreactor Oxygen demand and membrane pressure process of the work process without motor,blower or water pump. The reactor can make the energy consumption and operation cost greatly reduced, and the operating costs can be reduced by 56% to 78%.

Abstract: Antimony (Sb) and zinc (Zn) bilayer was sputter-deposited at room temperature with various Zn contents by ion-beam sputtering and transformed into Antimony zinc after post thermal annealed at 573K for 60 min. A power factor of 6.18×10-4 W/mK2 at 473 K has been obtained when the sputtering time of the Zn was 20 minutes. The maximum Seebeck coefficient is 42.0 μVK-1. Composition analysis shows that the compound of SbZn is achieved and the small Seebeck coefficient is due to the deviation of stoichiometric.

Abstract: In this paper, catalysts of (NH4)4SiW12O40 supported on polyvinylidene fluoride(PVDF) thin films were prepared and characterized by IR and SEM.In addition,sunlight as the light source and simulation of dyes effluent (malachite green) as the research object, through the orthogonal experiments studied the factors that influence catalyst photocatalytic degradation effects,such as the amount of catalyst, pH, the amount of hydrogen peroxide . The results show that the degradation of malachite green of the heteropoly acid catalyst immobilized by membrane is best under the conditions of visible and achieve high degradation rate( 90% ). Also , the catalytic effect is also related with the oxidant dosage and the acidity. The catalyst is energy saving, easy recovery and has widest foreground.

Abstract: PZT(lead zirconate titanate) piezoelectric thin films were deposited on the glass substrates by RF (radio frequency) magnetron sputtering reaction method. The XRD(X-ray diffraction) analysis is used to characterize the structure of thin film, the pattern of EDS(energy dispersive spectrometer) shows the composition of thin film, and SEM(Scanning Electron Microscopy) is used to study the morphologies of thin films. The influence of different sputter gas content on the crystalline quality and the surface morphology are also investigated. The results demonstrate that volatile of lead oxide is closed to the ratio with the oxide content. The roughness of the thin film is influenced by the crystalline quality.

Abstract: Cubic boron nitride (CBN) abrasive grains with surface titanium-deposited film were heat-treated during 550-950°C for 60 min under high vacuum circumstance. Detailed interfacial compounds analysis by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersion spectrometer (EDS), differential thermal analysis (DTA) indicates that the interfacial reactions are much dependent on the heating temperature to some extents, and the reaction products, TiN, TiB2 and TiB chiefly form the network structure. In particular, at 950°C the transition layers with excellent performance, CBN/TiB2/TiB/(TiB+TiN)/TiN/CBN, is realized.

Abstract: Electro-spark alloying (ESA) method was used to create a coating on the surface of TC11 alloy (Ti–6.5Al–3.5Mo–1.5Zr-0.3Si wt%). The oxidation behavior of the TC11 alloy and its deposited coating was investigated in air at 700°C. The resulting structures were analyzed in great detail by metallographic analysis and by scanning electron microscopy (SEM)

Abstract: Ni-Co/SiC composite coatings embedded with different sizes of micron-Sic particles were prepared on the surfure of 45 carbon steel through electrochemical deposition. The effects of size of SiC particles on the microstructure, the hardness and tribological properties of the composite coatings were investigated. The results show that the decrease of the size may increase the hardness, make microstructure closer and greatly improve their wear resistance. The Ni-Co/SiC(W7) coating exhibit better integrated properties, its hardness was HV505, 20 percent higher than Ni-Co alloy coating, and its wear rate was only 1/5 of the Ni-Co/SiC(W40) coating. The wear mechanisms of the coatings are mainly plastic deformation with slight adhesive wear.

Abstract: Hot dip galvanizing is being widely used to the numerous constructional steels such as a guard rail of high way, various types of structural steel for manufacturing ship and for some other fields etc.. Recently, the cost of zinc is getting higher and higher, thus, a proper manufacturing process should be developed possibly to reduce the cost of production. one of hot dip galvanizing process, that is, flux solution immersion process is very important to control more effective coating. However, flux solution is deteriorated with increasing its using time because dissolved iron from structural steel due to continuous flux treatment was increasingly increased, which is resulted in coating badness and increment of dross. In this study, the effect of additives to elimination of iron dissolved in flux solution was investigated with four types of inner solution, that is, solution of inner barrel was filled with seawater, NaOH, NH4Cl, including parameters of amounts of thiourea(0.2,0.4 ,0.6 and 0.8g) and electrolysis experiment was carried out with applied current density at 20mA/cm2. The best effect for elimination of iron from flux solution is considered that inner barrel with separator should be filled with solution different from original flux solution which contained in iron ion, that is, its inner solution should be composed with seawater added with additives such as thiourea(0.4g), NaOH(0.2 g) and NH4Cl(10g). In particular, we can see that the optimum amount of thiourea to extract effectively iron from flux solution is 0.4g.