Advanced Materials Research Vol. 549

Abstract: The modification of calcium sulfite in semi-dry desulfurization ash was studied. By the combining use of catalyst and oxidant, the content of calcium sulfite in the modified desulfurized ash was greatly reduced. In this way, the calcium oxide and calcium sulfate in the modified desulfurization ash were used to partially replace the lime, gypsum and other materials in the process of autoclaved brick production. The hydration reaction mechanism was discussed.

Abstract: Based on high density polyethylene (HDPE) as supporting and encapsulating materials, paraffin wax as energy storage materials, HDPE/paraffin composite for phase change materials was prepared in the paper. In order to low leakage rate of HDPE/paraffin composite for phase change materials, the influencing factors of leakage rate of HDPE/paraffin composite, such as temperature of mixing, time of mixing, different content of DCP, rate of cooling, were studied. The results indicated that low leakage rate of PCM could be prepared.

Abstract: Based on the experiment,the forming properties of Aluminum alloy in liquid forging was studied by adding rare-earth metal Y (Yttrium) modificatior and ternary modificatior(25% NaF +62% NaCl +13% KCl).The structure and mechanical properties of the prepared samples under two modifications were compared.The results showed that the rare-earth metal Y can modificatior liquid aluminum alloy forging a comprehensive mechanical properties of a substantial increase, the use of rare-earth metal Y (Yttrium)modificatior was better than ternary modificatior.

Abstract: Considering the interfacial debonding energy at the fiber/matrix interface, an improved Monte Carlo simulation has been done on the matrix failure of the unidirectional ceramic matrix composites. Firstly, the debond length formula was given, then the stress/strain formula was also reviewed, and the matrix failure was simulated by the improved Monte Carlo model, the effect of the interfacial debonding stress on the matrix cracks evolution and the stress/strain curve was considered especially. Lastly, the result was compared to the experiment data. The result shows that the larger interfacial debonding energy at the fiber/matrix interface, the larger debond stress, the crack density increase more slowly, the mean crack density smaller, the final failure strength lower. The improved Monte Carlo simulation result is agreed well with the experiment data.

Abstract: The activated carbon electrode has been widely used as an electrode material in capacitive deionization (CDI). The binder of activated carbon electrode has important influence on the electrochemical properties and structures of the electrodes. The effect of binder on the conductivity and capacitance of the electrodes is discussed in this article. And the structures characteristics of electrodes by adding different kinds of binder are summarized. The electrodes have higher capacitance and specific surface using polyvinylalochol (PVA) and sulfosuccinic-acid (SSA) as hydrophilic binder, comparing with hydrophobic binders include phenolicresin, polytetrafluoroethylene (PTFE) and polyvinylidenefluoride (PVDF). Therefore, activated carbon electrodes consisted by PVA and SSA are expected to become the future hot spot. The study of this paper has special significance to the choice and application of the binder in capacitive deionization.

Abstract: Laser Metal Deposition Shaping (LMDS) is a state-of-the-art technology that combines rapid prototyping and laser processing. There are many factors affecting the quality, precision, microstructure and performance of LMDS-deposited parts. Among them, dilution ratio is a significant one since it is not only an important index to judge the laser cladding quality, but directly affects the interlayer bonding strength and performance quality of as-formed metal parts. Thus, the substantial LMDS experiments were performed to conclude the influence of processing parameters on dilution ratio of laser cladding layer. The results indicate that the influence degree of scanning speed is most significant, while that of laser power is relatively slight. In order to ensure the perfect forming quality and strong metallurgical bonding, it is necessary to choose suitable dilution ratio to accomplish the LMDS process.

Abstract: The Laser Metal Deposition Shaping (LMDS) process involves injecting metallic powder into a molten pool created by a high power industrial laser. As the laser traverses across the substrate in a layer-by-layer fashion, a fully dense metal is left in its path. A few processing parameters involved with the LMDS include the laser power, traverse speed, powder feeding rate, and gas flow rate, etc, which affect many factors of LMDS technology. Among them, the powder utilization ratio is an important one because it directly determines the build rate and build height per layer. Due to some objective reasons, the powder utilization ratio is far less than 100%. In order to ensure the stability of LMDS technology, it is necessary to investigate the match between powder utilization ratio and build rate and forming efficiency, and grasp the influence rules of processing parameters on powder utilization ratio. Accordingly, the related experiments were performed with the varied laser power, scanning speed and powder feeding rate. The results prove that the powder utilization ratio is a varied value, and affected by the processing parameters. Consequently, the relative ideal parameter match should be chosen in accordance with the specific circumstances during the LMDS technology, thus ensuring the better powder utilization ratio and promoting the forming efficiency and economic benefit.

Abstract: The transportation and separation of Cu(Ⅱ) through a dispersion supported liquid membrane(DSLM) consisting of 2-ethylhexyl Phosphonic Mono-(2-Ethylhexyl) in kerosene, supported on the polyvinylidene fluoride membrane(PVDF), is studied. The effects of pH value in the feed phase, volume ratio of liquid membrane phase and hydrochloric acid, concentrations of HCl in the strip phase and initial concentration of Cu(Ⅱ) in the feed phase are also researched. The results show that copper ion can be transported effectively when pH =5.25 in the feed phase, the volume ratio is160:40, concentrations of HCl in the strip phase is 4.0mol/L. Under the optimum transport conditions, when initial concentration of Cu(Ⅱ) was 2.00×10^-4mol/L, the transport rate of Cu(Ⅱ)was up to 94.7% in 130 min.

Abstract: This paper proposes a dynamical performance-ranking method to predict the relative performance of soccer robot based on the mechanical analysis with energy materials. Introduce Fuzzy-PID control arithmetic in the soccer robot control system apply, make some mechanical analyses, give control system hardware compose and software achieve method. The experiment result shows that the design of robot soccer system is stable, reliability is high, and expansibility is strong.

Abstract: Established three-dimensional calculation model of three large space shear wall structures of different thickness, using finite element software ANSYS to calculate the seismic response analysis of these models,obtained time-displacement curves and stress distribution under earthquake structures of three large space shear walls of different thickness, and its comparative analysis; shows practical significance of large space shear wall structure.