Advanced Materials Research Vols. 971-973

Abstract: The curing characteristics,crosslinking density,compressive permanent deformation,the conventional mechanical properties and dynamic mechanical properties of SBR2564S filled with different carbon black were studied.The results indicated that with the increase in specific surface area of carbon black particles，Mooney viscosity of the resulting mixture increased while the scorch time decreased.As the carbon black particle size increases, tensile strength and tear strength of SBR2564S were reduced,rebound and compressive set were increased.The kinds of carbon black had little effect on the crosslinking density of vulcanized rubber of SBR2564S.It had poor performance on dynamic mechanical properties of the resulting mixture filled with small carbon black particle size.SBR2564S vulcanizates with good comprehensive properties was obtained when N330 was used.

Abstract: Countertop of integrated cabinet is the maximum number of contacts and the highest cost component, its material quality directly determines the final using functions. Artificial stone is an ideal material for the cabinet countertop, in order to solve its high cost, easy to crack and deformation problem, we try to develop a new technology to manufacture wood-based artificial stone composite board, which take particle board as core material and artificial stone as a surface material. Article studied the mechanism of composite materials, analyzed the selection principle of raw material for wood-based artificial stone composite countertop, designed two form structure of wood-based artificial stone composite countertop for integrated cabinet. Studied the process techniques and determined the production technology lines and optimum process parameters. Wood-based artificial stone composite countertop not only saved the usage amount of artificial stone, but also retain its lots of advantages, and improved strength, reduced costs, opening up the application scope of artificial stone materials.

Abstract: Taking August Grape as material, studied on the effect of 1000, 500 and 100 μL/L SO₂ fumigation treatments on postharvest quality and SO₂ residue of fruit stored under 0 °C. The results indicated that after 90 days of storage, all treatment could decrease the decay rate and bleaching. The 500 μL/L SO₂ fumigation treatment showed an ability to significantly inhibit decreasing of vitamin C content. The SO₂ residue in grape pulp treated by 500μL/L and 100 μL/L of SO₂ were 8.56 mg/kg and 6.03 mg/kg respectively which under the FDA safety standard (10 mg/kg) after 90 days storage, while the SO₂ residue in 1000 μL/L SO₂ fumigation treatment samples was 14.36 mg/kg which beyond the FDA safety standard.

Abstract: With the rapid development of finite element technique and computer technology, the design of the cold punching mould CAD / CAM with CAE analysis is changing the way that traditional craft manufacture mold, especially the development and application of stamping simulation software, make the stamping die design and processing and quantitative, can advance analysis of stamping process program, finally got the ideal pressing parameter, realize the automation of design, save resources and reduce the dependence on experience and reduce the demand for skilled workers. Based on nonlinear dynamic finite element software ANSYS / ls-dyna continuous function, simulation of sheet metal forming process and unloading plate deformation, forming process, at any time throughout the von mises stress nephogram should rebound results and strain value and unloading plate materials, help us better analysis to understand the changes of the internal material sheet metal stamping process.

Abstract: Zinc oxide nanostructures were successfully synthesized via a facile hydrothermal method. Structural characterizations by means of X-ray diffraction and field emission scanning electron microscopy were conducted, and the as synthesized products composed of numerous nanorods have a hierarchical flower-type structure. The optimum operating temperature of the sensing material to sulfur dioxide is about 270 °C, and the linear correlation coefficient of the sensing material to sulfur dioxide gas is equal to 0.978. Furthermore, this sensing material demonstrates reversible sensing response and rapid response-recovery characteristic to sulfur dioxide. All results indicate our products a promising sensing material for recognition of sulfur dioxide.

Abstract: Government is the group of politicians, government officials and civil servants with similar to a personal capacity, preferences and interests. Compared with the firm, they have no essential difference in the market economy system countries. Both seek to maximize interests for their respective Group. In this paper the government's views and actions in the public choice activities are analyzed by means the firm theory, which reveals that the direction of the environmental friendly industrial policy and its development level depend on the maximum degrees to combine the government` interests in tenure with their electorate’s one.

Abstract: In order to improve the interface bonding condition between Cu and SiC powders, electroless copper plating was applied to deposit a Cu coating on SiC powder. The surface morphology of the SiC powder with uncoated and coated copper were investigated. The results showed that the appropriate electroless plating time was necessary for the SiC_p with uniform copper-coating. The SiC_p/Cu composites were fabricated by hot-press sintering technology. The coated-copper SiC_p were uniformly distributed in copper matrix. Key words: Electroless plating, Cu/SiC_p composites, Metal coating

Abstract: We investigate geometric structure, electronic structure and ground properties of 3C-SiC as obtained form first-principles calculations based on density functional theory with the LDA, GGA, B3LYP and HSE06 method. After comparative analysis of the total energy, band structure, density of states and the bulk modulus, we found that 3C-SiC was an indirect band gap semiconductor, the top of valence band was located at Γ point, and the bottom of conduction band was located at X point. The indirect band gap of 3C-SiC calculated by LDA, GGA, B3LYP and HSE06 was 1.34 eV, 1.44 eV, 2.88 eV and 2.26 eV, respectively. Especially for B3LYP and HSE06 methods which clearly calculated the energy splitting and the energy dispersion of both the top of valence band and the bottom of conduction band was in well agreement with the experimental data. These results will provide theoretical basis for the design and application of SiC materials.

Abstract: The SiC network ceramics was prepared by the organic foam impregnation method and presureless sintering technologies. The network interpenetrating co-continuous SiC/Mg composites were fabricated by means of pressureless infiltration technique. The results showed that The coarse surface of the SiC network ceramics was observed in the SiC network ceramics, which was benefit for the reaction of the metal alloy during the impregnation process. The continuous and gradual interface can be found in the SiC/Mg composites. It was demonstrated that better interface structure was helpful for improving the bonding strength. Key words: Network Interpenetrating, Interface , Pressureless infiltration

Abstract: Metal micro forming is microscale effect in the process of classification and evaluation, for the correct understanding of micro forming and conventional forming difference, it is guiding significance in the course of micro forming technology similar to conventional forming which is applied to the data and experience. The microscale effect is beneficial to accurate grasp of all kinds of microscale effect in the forming reasonable classification and evaluation.Change law of microscale affects the nature of knowledge for the right team which provides effective quantitative data, when determine the major hours of rights, it also can provide the guiding idea for material selection and process optimization.The reasonable classification and evaluation of microscale effect is the experience that conventional forming calculation provides a reality way. In all kinds of process load calculation, as long as the material intrinsic microscale is joined, microscale can be introduced in corresponding few and the process conditions.