Advanced Materials Research Vols. 641-642

Abstract: By using local spin density approximation (LSDA) scheme within the density functional theory (DFT), the structural, magnetic and electronic properties of Heusler alloy Fe2V1-xCoxGa were comprehensively investigated. The results reveal that with the increase of Co-doped concentration, in Fe2V1-xCoxGa alloy, a nonmagnetic-ferromagnetic transition appears, and the nonlinearly structural and magnetic variation respectively against the linear Vegard law and Slater-Pauling rule are also detected. Further analysis of electronic structure reveals that both contributions from Fe-Co and Fe-V magnetic interaction in Fe2V1-xCoxGa alloy play a dominating role in determining the nonlinear magnetic and electronic behaviors.

Abstract: This paper studied the irreversible plastic deformation of PVDF monofilament. The four-element creep model was applied to obtain the theoretical creep curves with experimental data using nonlinear regression. The results were compared to the commonly used material PP monofilament. The results showed that four-element model was a suitable model to describe the creep behavior of PVDF monofilament. PVDF monofilament exhibited reduced irreversible plastic deformation under different stresses and elongation rates. It was more stable and recoverable. PVDF could be an advantageous alternative suture material to the traditional suture materials.

Abstract: In this study, a three-layer artificial neural network(ANN) model was constructed to predict the detonation pressure of aluminized explosive. Elemental composition and loading density were employed as input descriptors and detonation pressure was used as output. The dataset of 41 aluminized explosives was randomly divided into a training set (30) and a prediction set (11). After optimized by adjusting various parameters, the optimal condition of the neural network was obtained. Simulated with the final optimum neural network [6–9–1], calculated detonation pressures show good agreement with experimental results. It is shown here that ANN is able to produce accurate predictions of the detonation pressure of aluminized explosive.

Abstract: Modified by silane coupling agents APTES and MPTES, PAN fiber was provided with multi-chelating-group on it. Through the chelating effect, it can be directly used to eletroless silver plating without roughening, sensitization and activation. The molecule structure, morphology and thermal stability were characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and therm-gravimetric (TG) analysis. In addition, electrical conductivity, and washing performance were also tested respectively. The results indicated that silver-coated PAN fiber based on APTES/MPTES modification had high conductivity with a compact and homogeneous silver layer, as well as good washing fastness performance.

Abstract: The active high temperature resistant insulation material is devised to fulfill the specified requirements of the packing material. The complex material K2O.6TiO2 whisker/expanded perlite/resol was prepared in 20mm thickness, its back temperature was stable below 180°C in fire test with its front surface burned by the fire at 950°C—1050°C, but its compressive strength was 4.22MPa and its impact strength was just 0.43 kj/m2 Whereas the back temperature of the complex material Al2(SiO3)3 fiber/resol was stable below 140°C under the same test condition and its density and physical strength can be control. the compressive strength of the complex material Al2(SiO3)3 fiber/resol was between 5.0MPa and 30.0MPa versus the density between 0.75g/cm3 and 1.05g/cm3 while its impact strength was hardly influenced by the density. The thermal coefficient of the material through the fire test became lower. The analysis of its structure and thermal behavior show the complex material prepared possesses the function of active high temperature resistant insulation.

Abstract: Abstract: the anti-corrosion treatment to the steel metal with the O/W emulsion prepared by combining the organosilicon and phosphating solution not only safeguards the corrosion resisting properties of the steel surface but also promotes the bond strength between this phosphating film and the following coating. This paper discussed the preparation technologies and the construction processes of this O/W emulsion. Coating films was test by EIS and SEM, proved that the film had excellent anti-corrosion perfomences.

Abstract: First principles calculations have been performed to investigate the elastic and electronic behaviors of Li₃Bi as a function of pressure from 0 GPa to 100 GPa with a step 10 GPa. Our calculations indicate that the lattice parameters and volume of cubic Li₃Bi decrease with the increasing pressure. Cubic Fm-3m structure of Li₃Bi is more mechanically stable at pressures of up to 100 GPa. The calculated results of the bulk, shear, Young’s modulus, B/G ratio of Li₃Bi as a function of pressure show that Li₃Bi has higher bulk, shear modulus and better ductility at 0 GPa than 50 GPa. The analysis of electronic properties reveals that the covalent Bi-Li bonding plays an important role in hardness and incompressibility of Li₃Bi.

Abstract: In this paper, productive technology and application of reflective thermal insulating coatings at home and abroad in the field of architecture has been introduced. Its testing device has been designed, and the related factors which influenced its thermal properties has been analyzed. The silt sintered brick combined with reflective thermal insulating coatings. Its feasibility has been analyzed whether it could make indoor reach a certain temperature condition.

Abstract: According to the formula of the resistance to internal pressure, the main factors of the strength of the beer bottles are analyzed. Using ANSYS finite element analysis software, PET beer bottles damaged boundary conditions are determined. PET beer bottle model is established, and have the stress analysis. The internal pressure and the bottle top pressure are applied on PET beer bottles. PET beer bottles strain is analyzed in two loads with different thickness and different bottle diameter. Thickness and bottle diameter influence of the mechanical properties of PET beer bottles are obtained. It provides a method and basis of the structure to optimize the design of PET beer bottles.

Abstract: The production technology of silt sintered porous brick in Nantong has been introduced from the following three aspects: the first one, the excavating and processing of raw materials, the second one, the preparation and amount of inside fuel; the third one, mix design and the optimization design of hole shape structure. Four mix schemes have been designed. According to the new standard requirement, using staggered arrangement article rectangle holes and rectangular hole, designed a structure which was eight 36mm*13mm rectangle holes, fifteen 21mm*13mm rectangle holes and the hole rate was 28.4%.