Materials Science Forum Vol. 1001

Abstract: With the continuous development of Chinese science and technology, structured ultra-light porous metal materials are a new type of multifunctional materials that have emerged with the increasing demand for diverse materials preparation and machining technologies in recent years. New topics in feature and performance research. In the field of material manufacturing and machining, ultra-light porous metal materials have appeared. Ultralight porous metal materials have many functional characteristics. As a new type of material that is different from dense materials, porous metal materials are the first to explain the concept of ultralight porous metal materials and the functional characteristics of ultralight porous metal materials. Analysis, and finally the specific application of ultralight porous metal materials is studied. Structured ultralight porous metals are a multifunctional engineering material with excellent performance, have good application prospects, and have become the focus of attention and research.

Abstract: PEO/graphene composites were prepared by a simple and green method in presence of graphite oxide (GO) reduced by Vitamin C (VC) in aqueous. In this process, GO was dispersed well into PEO aqueous solution before reduction. Although the carbon content and hydrophobic properties of graphene sheets were increased during the reduction, the uncompleted reduction process could be detected and confirmed by FTIR and TGA. The residual oxygen containing groups on the surface of graphene sheets could improve the compatibility of PEO and graphene sheets in aqueous.

Abstract: The hydrogenation of CO₂ to CH₄ can realize the utilization of CO₂, which has an important implications to both the energy and environment. As a result of the low catalytic activity of the supported Ni/SiO₂ catalyst, the ZrO₂ is added to improve its catalytic performance by the impregnation method. The experimental results show that ZrO₂ is an effective promoter to enhance the low-temperature catalytic activity of Ni/SiO₂ catalyst.

Abstract: Earthquake will cause great damage to a large number of buildings and structures, resulting in a large number of casualties and huge economic losses, so reducing the earthquake disaster has become an urgent problem for earthquake engineering workers. Isolation technology emerges at the right moment, and gradually becomes an effective technology of building seismic mitigation. The most effective isolation technology is to use rubber isolation bearing, but the change of the compression strain field of rubber material has no feasible law so far, and the properties of rubber material will directly affect the performance of the isolation bearing, resulting in the reduction of the isolation effect of buildings or structures. Therefore, this paper studies the change of strain field of rubber under compression.

Abstract: Triazole heterocyclic compounds have a wide range of applications in the fields of medicine, pesticide, energetic materials, etc. Introducing halogen atoms and amino groups into the triazole ring can obtain a series of important intermediates that can be further modified. 4,5-Dibromo-1-H-1,2,3-triazole (5), 3,5-dibromo-1-H-1,2,4-triazole (6), 3,5-dibromo-4-H-1,2,4-triazole (7) and 1-amino-4,5-dibromo-1,2,3-triazole (8), 2-amino-4,5-dibromo-1,2,3-triazole (9) and 1-amino-3,5-dibromo-1,2,4-triazole (10) were synthesized through the bromination and amination of 1,2,3-triazole (1), 1-amino-1,2,3-triazole (2), 1,2,4-triazole (3) and 4-amino-1,2,4-triazole (4). Their structures were characterized by IR, EI-MS, ESI-MS, ¹H and¹³C-NMR techniques. Single crystals of these compounds were grown by evaporation solution growth technique. The cell parameters and crystal structures were determined by X-ray single crystal diffraction studies. Among these compounds, 6 and 7, 8 and 9 were isomers, respectively. Through intermolecular hydrogen bonding, 1 forms zigzag chain structure, while 4 and 5 form cyclic trimers.

Abstract: Traditional silicon-based photodetectors are limited by the band gap of silicon, which results in a limited working wavelength range. In this report, due to the excellent properties of Indium Antimonide, the InSb/Si heterojunction photodetectors are fabricated. Under ambient temperature of 280K, as-prepared photodetectors show a specific detectivity of 9.310¹¹ cm Hz^1/2/W, responsivity of 54 mA/W, on/off ratio of 510⁴ under the laser irradiation of 635 nm. In order to explore the influence of working temperature on device performance, the photoresponse at different temperatures was tested. This report proved that as the working temperature increases, the responsivity and specific detectivity of the device decrease, and the performance of the device becomes worse.

Abstract: A series of oil in water (O/W) microemulsions were prepared through drop by drop method at constant temperature, taking Span80/Tween80 as a composite emulsifying system and Macol-52 as oil phase. Effects of the mass ratio of composite emulsifying system and oil/emulsifier ratio on the particle size were studied. Finally, the best technological conditions were selected and the stability of the microemulsion was also researched. Results showed that the most suitable Span80/Tween80 mass ratio was 1:1 and the oil/emulsifier ratio is 1:1. Under this condition, the mean particle size of the o/w microemulsion was 71.1 nm and the polydispersity index was 0.151. Moreover, the microemulsion maintain a bright and uniform stable system after 20minutes’ centrifugation at the speed of 4000r/min and the particle size increased slightly.

Abstract: The pattern-less sand mold was used as the research object, surface quality of sand mold was carried out by using surface abrasion tester. In this paper, the influence of sand material such as the types of sand, resin contents and extrusion pressure on the surface quality was studied through the single-factor test. The results showed that: different sand mold had different surface abrasive resistance. The angle coefficient of sand has a great influence on the surface abrasive resistance of the sand mold. With the increase of extrusion force, the surface abrasive resistance of sand mold increased. And as the resin content increased, the surface abrasive resistance of sand mold continued to increase.

Abstract: Fiberglass reinforced plastic fishing boats is a new type of energy saving and emission reduction boats, which is a significant revolution of fishing craft. However, the design of FRP fishing vessels in China continue to use the similar method employed by steel fishing vessels, which ignores the designability of fiberglass, leading to the light and high strength characteristic of glass fiber buried. the typical structure of FRP boats were analyzed, including the study on the influence of core material on the mechanical properties of cap type girder and the feasibility by using the equal sectional dimension in the Patran software of beam element to equivalent simulate the cap-type material, which simplified the whole ship building process of the finite element model and improved the computational efficiency in this pape.

Abstract: Crystal plasticity deformation of aluminium plays an important role on the investigation of macro deformation. In this paper, to discuss the effect ot crystal plasticity on the aluminium material behavior, crystal plasticity theory and macro finite element was combined together. The basic theory of crystal plasticity and finite element was introduce and the simulation result of aluminium was given. The stress and strain distribution was discussed and the efficient of the method was shown. It is shown that the orientation of the material and other micro character of the materials all influence the plasticity behavior of the material greatly.