Advanced Materials Research Vols. 160-162

Abstract: In the development of modern cities, building decoration materials are like a hundred flowers in bloom with the rapid development of society and technology. Coating-Architecture becomes the conspicuous central point for its distinctive charm. This paper focuses on the superiorities of Coating-Architecture in various angels, such as architectural aesthetics, economy, construction and maintenance. It indicates Coating-Architecture do possesses an irreplaceable potential in the urban development.

Abstract: We present a systematic study of the effect of the sputtering parameters on the structure and composition of InSb film. The effect of the sputtering parameters on the crystallographic structure of InSb films is discussed in terms of the kinetic energy of the particle bombarding the growing film. Measurements of the chemical composition show that In to Sb concentration ratio increases with the increase of working pressure because Sb atoms are more rapidly thermalized by collisions with argon atoms during the transport process of the sputtered atoms. And the composition of the films is governed by the Sb re-evaporation process at the surface of the growing films. In to Sb concentration ratio is enhanced by increasing the substrate temperature (essentially) or RF power.

Abstract: In order to investigate the microstructure evolution of materials, loading and unloading experiments with specimens deformed at different strains are required. In this paper, momentum traps were introduced for rendering the conventional Split Hopkinson Tension Bar suitable for loading-unloading experiment. The new technique allows a specimen to be loaded to a preset strain for post-test characterization. This technique was applied to study the dynamic mechanical properties of pure titanium. The results show that: 1) the twinning density of titanium increases rapidly as the strain increases. 2) The strength and ductility of titanium exhibited on the adiabatic curve are much smaller then those exhibited on the isothermal curve, which may be caused by the adiabatic heat generated during the transient deformation process.

Abstract: The present status of iron and steel industry of China and Yunnan were given in this work. Base on the analysis of iron and steel industry of Yunnan, we choose two steel plants (marked plant A and plant B) as the typical factories to confirm the emission factor of SO2. The emission factor of SO2 was achieved by mass balance method. In steel plant A, the emission factor is 9.684 (kg-SO2/t-steel), after flue gas desulfurization, the factor dropped to 1.476 (kg-SO2/t-steel). It indicates that desulfuration of sinter flue gas is important to reduce SO2 emission. In steel plant B, the emission factor is 5.4(kg-SO2/t-steel) without desulfurization. However, according to Discharge Coefficients of Industrial Pollutants in the First National General Survey of Pollution Sources(Survey Handbook), the SO2 emission factor of plant B is 4.15(kg-SO2/t-steel). We can see the differences exist between Yunnan’s discharges of pollutants with national Survey Handbook. Because the national Survey Handbook represents the national average level and manufacturing technique and raw materials of various factories vary greatly within the country. So it’s necessary to confirm the emission factor for Yunnan province.

Abstract: Mg72.5Zn26Y1.5 quasicrystal alloys were investigated under different solidification conditions. The specimens of Mg-Zn-Y alloys with cooling rates from 13.2K/s to 69.8K/s were gathered by a designed multi-channel temperature acquiring system and then the microstructures and phase evolution of the alloys were analyzed. The results show that the precipitation temperature of icosahedral quasicrystal phase (I-phase) increased with cooling rate increased from 13.2 K/s to 69.8K/s. The microstructure was mainly made up of α-Mg, I-phase and Mg7Zn3 phase. Meanwhile, the quasi-crystalline morphology was significantly different in the experiments. It changed from five (six) petals to the big pentagon with the decreased cooling rate.

Abstract: Aggregate obtained by breaking wasted concrete is called recycled aggregate. Recycled aggregate concrete (RAC) is a kind of practical and economic material to reuse the great amount of construction and demolition wastes, which has received many discussions nowadays.Its fatigue behavior is different from other concretes as a result of different property of the aggregate of recycled concrete and other concrete. In order to apply RAC more effectively, it is necessary to study its properties especially for those aggregates from earthquake-stricken area for post-earthquake reconstruction. Therefore, on the basis of experimental research, the fatigue behaviors and microstructure of recycled concrete are studied in this paper. The present paper deals with investigations on fatigue behavior of the axial and eccentric compression performance of recycled aggregate reinforcement concrete specimens which are made from different recycled aggregate proportion such as 0%、50%、100%. Then micro-structural observations of the specimens by means of scanning electron microscopy (SEM) were obtained. Based on the analysis of experiment results, it can be proved that it is feasible to apply recycled concrete to practical engineering.

Abstract: The buckling-restrained brace has stable energy dissipation capability. It has been widely used in recent years. This paper uses finite element software ANSYS to do non-linear time history analysis for Center Braced Steel Frame, Eccentrically Braced Steel Frame, Buckling-restrained Braced Steel Frame under the earthquake. The results show that: (1) The peak acceleration, residual displacement and top floor displacement of buckling-restrained braced steel frame is smaller than the other two brace frames, provide support for the structure stability. (2) The damping energy and bracing energy dissipation capability of buckling-restrained braces and eccentrically braced are strong, so it can avoid the collapse of the main structure under the large or medium earthquake.

Abstract: This work presents the possibility of obtaining high density austenitic stainless steel parts by powder metallurgy (PM) and sintered in vacuum. Mechanical properties such as tensile strength, yield stress, elongation rate and Vickers hardness were measured by using a tensile testing machine and a Vickers hardness tester at room temperature. Microstructural characterization was performed by means of optical microscopy and scanning electron microscopy (SEM). The effect of sintering temperature on densification and mechanical properties of PM austenitic stainless steel has been investigated. The results show that density and mechanical properties were increased with the increase of sintering temperature, but when the sintering temperature is above 1340 °C, they increased slowly. The highest mechanical properties were obtained when sintering temperature was 1340 °C.

Abstract: The laboratory studies on the mechanical properties of the GFRP beams with two different sections are carried out. Their mechanical behavior and the failure features are described and analyzed. The test results indicate that the stability of the GFRP middle beam and the local strength at the joint between the web and the flange are the main factors in the design of the composite middle beams. Based on the test results, a new-style GFRP middle beam with- I-section and double webs is proposed and designed. Loading test shows that the composite material with I-section and double webs can satisfy the requirements for the globe and local stabilities, and simultaneously the material strengths of the middle beam can also be fully utilized. Maybe the proposed new-style beam is the best section type for the middle beam. Also, local strengthening should be adopted in the middle beam-bolt joint.

Abstract: By using a series of tests for corrosivity, acute toxicity and leaching toxicity of cyanide-containing wasteresidues, the toxicity of cyanide-containing wasteresidues has been investigated. According to acute toxicity test, the wasteresidues showed no acute toxicity. The experiment further indicated that the cyanide compounds were tested in the 0.15 ～ 0.60 concentration rang, mean (0.429), standard deviation (0.195) and variation coefficient (45.5%). The pH value range for leaching liquor of slag yard was 9.21～13.09 at the mean 10864, and the standard deviation and variation coefficient were 1.553 and 14.3% respectively. The research revealed that the cyanide compounds content in wasteresidue samples was distributed very unevenly, and the content of cyanide compounds was not exceeded the standard. Based on the current analysis results, those cyanide-containing wasteresidues were defined as hazardous solidwastes with corrosivity.