Advanced Materials Research
Vols. 488-489
Vols. 488-489
Advanced Materials Research
Vol. 487
Vol. 487
Advanced Materials Research
Vol. 486
Vol. 486
Advanced Materials Research
Vol. 485
Vol. 485
Advanced Materials Research
Vols. 482-484
Vols. 482-484
Advanced Materials Research
Vols. 479-481
Vols. 479-481
Advanced Materials Research
Vols. 476-478
Vols. 476-478
Advanced Materials Research
Vols. 472-475
Vols. 472-475
Advanced Materials Research
Vols. 468-471
Vols. 468-471
Advanced Materials Research
Vols. 466-467
Vols. 466-467
Advanced Materials Research
Vol. 465
Vol. 465
Advanced Materials Research
Vols. 463-464
Vols. 463-464
Advanced Materials Research
Vol. 462
Vol. 462
Advanced Materials Research Vols. 476-478
Paper Title Page
Abstract: Based on A356, development and application of a new Al-Si-Mg alloy had been studied, aimed to get an alloy with excellent mechanical property and suitable for semi-solid forming. An adjustment of Mg content is made, from 1% to 2.5%, to ensure the composition range. The temperature range of semi-solid alloys can be obtained through the phase calculation on the alloys with T-cal, a kind of thermodynamic software. The accuracy of phase can be verified with differential scanning calorimeter (DSC). The chosen alloys are melted to be prepared for specimens, followed by mechanical testing. Finally, the optimal composition can be got according to mechanical properties, to be used for electromagnetic continuous casting, followed by the induction reheating and thixotropic semi-solid forming process. The law analyses were discussed during the induction reheating for Al-Si-Mg alloy and A356.
670
Abstract: The protection layer was introduced to the surface of the Li anode to enhance the charge/discharge performance of lithium/sulfur batteries. The Pt protection layer was formed by magnetron sputtering method. When the Li anode is coated with the protection layer, the unit cells with a liquid electrolyte showed an enhanced charge/discharge performance, resulting in an average discharge capacity of 750mAh/g during 90 cycles. All the charge/discharge tests were performed at room temperatures.
676
Abstract: The machining center of SINUMERIK-802D system offers a large variety of machining methods. This paper compares a simplified cutter presetting method and several instructions that are less frequently used including rounding instruction (G1/G2/G3, RND), feed rate override instruction (CFC/CFTCP), helical interpolation instruction (G2/G3, TURN) and automatic input of radius compensation instruction ($TC_DP6) with other common instructions and introduces the flexible and simple application of these unfamiliar methods, in an attempt to provide some reference and inspiration for operators.
681
Abstract: This study dealt with the processing, microstructure and wear behavior of vanadium carbide reinforced iron matrix composite. Powder technology combined with in situ synthesis was used to successfully fabricate the composite. The microstructure of the composite was characterized by X-ray diffraction, scanning electron microscope and transmission electron microscope. The microstructural study reveals that the round VC particles are distributed uniformly in the iron matrix, the interface between the iron matrix and VC is clean, and no interface precipitates is found. Dry-sliding wear behavior of VC-Fe composite was tested using MM-200 wear testing machine. The results indicate that the composite has excellent wear resistance, and microploughing and grooving are the dominant wear mechanisms for the composite. Hardness and bend strength of the composite are 62HRC and 990.1MPa, respectively.
686
Abstract: Nanoparticle CdS was prepared by use of microwave irradiation method. CdS/TiO2 composite was prepared by sol-gel method. The characteristics of composite material were investigated by means of X-ray diffraction (XRD), scanning electron microscope (SEM)and Fourier transform infrared (FTIR). Butyl titanate(TBOT) hydrolysis kinetics was discussed. The formation products were mainly anatase TiO2 and hexagonal CdS. Infrared emissivity test results showed: at 650°C, molar ratio of CdS/TiO2 was 2:3, infrared emissivity of composite material was 0.2872.
691
Abstract: Geosynthetic Clay Liner, a water-proofing material which takes polymer as its carrier and bentonite as its basis, has been widely applied in the seepage-proofing projects including irrigation works, gardening and roadbed. In order to improve salt-resistance of bentonite used in Geosynthetic Clay Liner in saline environment, this paper innovatively uses chemical methods to modify the bentonite material. The experimental result shows that the optimum conditions are 100% of acrylic neutralization degree, 0.04%MBA, 1.2%KPS and holding at 70°C for 1 h. According to results of soil moisture supply capacity (MSC), swelling capacity of modified samples raises 30% ~170%.
696
Abstract: A 3D finite-elements model of 45# carbon steel of linear friction welding is built with the dynamic explicit code ABAQUS/explicit based on the solution of several key techniques, such as contact boundary condition treating, material properties definition, meshing technology, etc. Then the reliability of the model is validated by comparison with experiments in the literature. Furthermore, numerical simulation and analysis of the linear friction welding process of 45# steel have been carried out by using the model. The temperature field of workpiece, the temperature change of center point of welding interface and the metal flow behavior of welding interface are showed in results.
701
Abstract: Because of the excellent performance of Polyetheretherketone (PEEK), it is widely used in aerospace, mechanic, electronic and auto industry. Here the properties of injected molded PEEK composites reinforced by short carbon fiber (SCF), and the influence of SCF on the mechanical performance and thermal expansion performance were studied. It was indicated how the mechanical and thermal performance were changed with SCF content. Also the microstructure of PEEK composites was studied by taking SEM photographs. The results showed, in the here studied range of SCF content, the mechanical performance of PEEK composites rapidly increased with the increasing of SCF content. While the weight percent of short fibers was more than 10%, this increasing tendency became slow. SEM photographs showed, the interaction between base material PEEK and SCF was good, that because SCF could be good connected with PEEK base material, and the filling with SCF could also decrease the thermal expansion coefficient of PEEK composites.
705
Abstract: A series of intercalated kaolinite with formamide, potassium acetate and acrylamide were prepared. The thermal deintercalation processes of these composites were studied using a combination of X-ray diffraction and thermal analysis technique. X-ray diffraction spectra showed acrylamide could be indirectly intercalated into kaolinite layers. The activatory energy of thermal deintercalation of acrylamide from kaolinite-potassium acetate composites was 15.60 kJ/mol, higher than that from kaolinite-formamide composites, 9.51 kJ/mol. The reason was that strong hydrogen bondings between acrylamide and potassium acetate were formed in kaolinite layers.
710
Abstract: Multi cage-like zinc oxides were prepared via a facile hydrothermal method. The as-synthesized materials were characterized by means of XRD, TG-DTA, SEM, EDS, and N2 adsorption. The results indicate that the molar ratio of glucose to zinc cation has a significant effect on the morphology, surface area, pore size and distribution of the obtained products. This method is attractive for its merits such as simplicity, commercial feasibility, environmentally benign, surfactant-free, and good potential for scale-up.
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