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Study on hypereutectic Al-Si alloy fabricated by liquid-liquid mixing

2013 International Conference on Material Science and Engineering, ICMSE 2013

作者： Li, Yuan-Dong Hu, Shao-Hua Li, Xia He, Ming-Tao Ma, Ying Apelian, Diran State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials Lanzhou University of Technology Lanzhou 730050 China Key Laboratory of Non-ferrous Metal Alloys The Ministry of Education Lanzhou University of Technology Lanzhou 730050 China Metal Processing Institute Worcester Polytechnic Institute Worcester MA 01609 United States

ISBN: (纸本)9783037858707

The hypereutectic Al-20%Si alloy was fabricated by liquid-liquid mixing of Controlled Diffusion Solidification(CDS), and the mixing interface of two precursor alloys as well as the effects of pouring temperature during liquid-liquid mixing process on microstructure of size, morphology and distribution of primary silicon were studied. The results show that the size of primary phase decreases as the pouring temperature decreases, and the distribution of primary phase becomes uniform, but the morphology changes unobvious. Meanwhile, the liquid-liquid mixing interface is divided into four areas: low temperature alloy area, interface front area, fine grain area and high temperature alloy area. © (2013) Trans Tech Publications, Switzerland.

关键词： Aluminum alloys

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Influence of cobalt element on corrosion resistance of Cr18-Ni9 austenitic stainless steel

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Cailiao Rechuli Xuebao/Transactions of materials and Heat Treatment 2013年第5期34卷 125-130页

作者： Guo, Tie-Ming Jia, Jian-Gang Nan, Xue-Li Ji, Gen-Shun Zhang, Ding-Cang State Key Laboratory of Gansu Advanced Non-Ferrous Metal Materials Lanzhou University of Technology Lanzhou 730050 China Key Laboratory of Non-Ferrous Metal Alloys and Processing of Ministry of Education Lanzhou University of Technology Lanzhou 730050 China

Cr18-Ni9 austenitic stainless steels without and with cobalt of 0, 0.36% and 0.55% were smelted by a vacuum induction furnace. Intergranular corrosion sensitivity of the steels was researched by 65% boiling nitric acid method and the electrochemical potentiokinetic reactivation method (EPR). Pitting corrosion resistance of the steels was valuated by electrochemical test method (the anode circular polarization curve method) and chemical immersion method. The results show that the corrosion rate in 65% boiling nitric acid of the Cr18-Ni9 stainless steels containing 0.36% and 0.55% cobalt element increases, and the reactivation rate in dilute sulphuric acid medium and intergranular corrosion sensitivity of the stainless steels also increase. The addition of 0.36% cobalt element has little influence on pitting corrosion resistance of the Cr18-Ni9 austenitic stainless steel, but pitting corrosion tendency increases distinctly of the stainless steel containing 0.55% cobalt. The addition of 0.55% cobalt reduces the repair ability of the passivation film of the Cr18-Ni9 austenitic stainless steel in chloride ions medium, resulting in the decrease of distinctly. The electrochemical characteristics of local corrosion coincide with the results of immersion corrosion.

关键词： Pitting

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Plasmonic titanium nitride nanostructures for perfect absorbers

Plasmonic titanium nitride nanostructures for perfect absorb...

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Optical Nanostructures for Photovoltaics, PV 2013

作者： Guler, Urcan Li, Wei Kinsey, Nathaniel Naik, Gururaj V. Boltasseva, Alexandra Guan, Jianguo Kildishev, Alexander V. Shalaev, Vladimir M. School of Electrical and Computer Engineering Birck Nanotechnology Center Purdue University West Lafayette IN 47907 United States State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China DTU Fotonik Department of Photonics Engineering Technical University of Denmark Lyngby DK-2800 Denmark

We propose a metamaterial based perfect absorber in the visible region, and investigate the performance of titanium nitride as an alternative plasmonic material. Numerical and experimental results reveal that titanium... 详细信息

ISBN: (纸本)9781557529862

关键词： Titanium nitride

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Tailoring the Porous Hierarchy and Dimension of Styrene-based Polymers by Spontaneous Inorganic Nano-Templating

Tailoring the Porous Hierarchy and Dimension of Styrene-base...

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International Conference on Nanoscience & technology,China 2013(ChinaNANO 2013)(中国国际纳米科学和技术大会)

作者： Ge Tian Jie Hu Shengchun He Jie ying Siming Wu Yong Wang Xiaoyu Yang Baolian Su State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology122 Luoshi Road430070WuhanChina Laboratory of Inorganic Materials Chemistry (CMI)The University of Namur (FUNDP)61rue de BruxellesB-5000 Namur (Belgium) State Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of Technology122 Luoshi Road430070WuhanChina Laboratory of Inorganic Materials Chemistry (CMI) The University of Namur (FUNDP)61rue de BruxellesB-5000 Namur (Belgium)

Nanoporous polymers, especially these presenting multimodal or multiscale porosity are of considerable interest because of their present advantages:hydrophobic surface, flexibility, biocompatiblity, easy functional modification, well regularity and so *** traditional templating techniques have been extented to fabricate the hierarchical structured polymer, such as breath figure, colloidal crystal, supercritical fluids, and emulsion templating.

关键词： Styrene-based polymers metal alkoxide/alkyl spontaneous inorganic nano-template tailored porous structure

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Structure and electrical properties of ternary BiFeO_(3)-BaTiO_(3)-PbTiO_(3) high-temperature piezoceramics

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Journal of advanced Ceramics 2012年第3期1卷 227-231页

作者： Zhonghua YAO Ying LIU Zhe SONG Zhijian WANG Hua HAO Minghe CAO Zhiyong YU Hanxing LIU State Key Laboratory of Advanced Technology for Materials Synthesis and Processing and Key Laboratory of Advanced Technology for Specially Functional Materials Ministry of EducationWuhan University of TechnologyWuhan 430070China

In the current work,the bulk ternary(0.85-x)BiFeO3-xBaTiO3-0.15PbTiO3(BF-BTx-PT,x=0.08-0.35)system has been studied as a potential high-temperature *** with various content of BT were prepared via solid-state route,and pure perovskite phase was confirmed by X-ray *** temperature dependence of dielectric constants confirmed the decrease of Curie temperature with increasing BT *** was found that the morphotropic phase boundary(MPB)composition of BF-BTx-PT ceramics was in the vicinity of x=0.15,which exhibits optimal properties with piezoelectric constant d33 of 60 pC/N,high Curie temperature of 550℃,and low sintering temperature of 920℃.Measurements also showed that the depoling temperature was 300℃,about 150℃higher than that of commercialized PZT ceramics,which indicated good temperature ***-BTx-PT ceramics are promising candidates for high temperature applications.

关键词： ceramics piezoelectric materials barium titanate perovskite ferroelectrics

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Strain derivatives of Tc in HgBa2CuO4+δ: The CuO2 plane alone is not enough

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Physical Review B 2014年第2期89卷 024515-024515页

作者： Shibing Wang Jianbo Zhang Jinyuan Yan Xiao-Jia Chen Viktor Struzhkin Wojciech Tabis Neven Barišić Mun K. Chan Chelsey Dorow Xudong Zhao Martin Greven Wendy L. Mao Ted Geballe Department of Geological and Environmental Sciences Stanford University Stanford California 94305 USA SIMES SLAC National Accelerator Laboratory Menlo Park California 94025 USA Department of Physics South China University of Technology Guangzhou 510640 China Advanced Light Source Lawrence Berkeley National Laboratory Berkeley California 94720 and Earth and Planetary Sciences University of California Santa Cruz California 95064 USA Geophysical Laboratory Carnegie Institution of Washington Washington DC 20015 USA Center for High Pressure Science and Technology Advanced Research Shanghai 201203 China School of Physics and Astronomy University of Minnesota Minneapolis Minnesota 55455 USA AGH University of Science and Technology Faculty of Physics and Applied Computer Science 30-059 Krakow Poland Service de Physique de l'Etat Condensé CEA-DSM-IRAMIS 91198 Gif-sur-Yvette France State Key Lab of Inorganic Synthesis and Preparative Chemistry Jilin University Changchun 130012 China Photon Science SLAC National Accelerator Laboratory Menlo Park California 94025 USA Department of Applied Physics and Geballe Laboratory for Advanced Materials Stanford University Stanford California 94305 USA

The strain derivatives of Tc along the a and c axes have been determined for HgBa2CuO4+δ (Hg1201), the simplest monolayer cuprate with the highest Tc of all monolayer cuprates (Tc = 97 K at optimal doping). The underdoped compound with the initial Tc of 65 K has been studied as a function of pressure up to 20 GPa by magnetic susceptibility and x-ray diffraction. The observed linear increase in Tc with pressure is the same as previously found for the optimally doped compound. The above results have enabled an investigation of the origins of the significantly different Tc values of optimally doped Hg1201 and the well-studied compound La2−xSrxCuO4 (LSCO), which has a maximal Tc of 40 K, or only 40% of that of Hg1201. Hg1201 can have almost identical CuO6 octahedra as LSCO if specifically strained. When the apical and in-plane CuO2 distances are the same for the two compounds, a large discrepancy in their Tc remains. Differences in crystal structures and interactions involving the Hg-O charge reservoir layers of Hg1201 may be responsible for the different Tc values exhibited by the two compounds.

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The research progress and development trend of micro-forming technology for bulk metallic glasses

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Gongneng Cailiao/Journal of Functional materials 2013年第15期44卷 2133-2137页

作者： Li, Chun-Yan Kou, Sheng-Zhong Zhao, Yan-Chun Yuan, Xiao-Peng Yuan, Zi-Zhou State Key Laboratory of Gansu Advanced Non-Ferrous Metal Materials Lanzhou University of Technology Lanzhou 730050 China Key Laboratory of Non-Ferrous Metal Alloys and Processing of the Ministry of Education Lanzhou University of Technology Lanzhou 730050 China

The basic characteristics and main research fields of micro-forming technology were presented in this paper. Metallic glasses were identified as the ideal micro-forming materials. The advantages of bulk metallic glasses applied to micro-forming and the latest research progress were summarized, the development trends of micro-forming technology on bulk metallic glasses were elaborated, and the development direction was pointed out.

关键词： Forming

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synthesis and Self-Assembly of Core-shell Co@SiO2 Magnetic nanocomposites

Synthesis and Self-Assembly of Core-shell Co@SiO2 Magnetic n...

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International Conference on Nanoscience & technology,China 2013(ChinaNANO 2013)(中国国际纳米科学和技术大会)

作者： Si-Ming Wu Nan Jiang Wei Geng Ru-Jin Cheng Jie Hu Jie Ying Sheng-Chun He Yong Wang Xiao-Yu Yang State Key Laboratory of Advanced Technology for Material Synthesis and Processing Wuhan University of TechnologyLuoshi Road 122Wuhan 430070P.R.China

In recent years, self-assembly nanoparticles into well-ordered structures possess quite important position in spectroscopy, magnetism, catalysis and *** all of the nanoparticles, magnetic nanoparticles promises an unparalleled opportunity for self-assembly as they can be controlled to form directional arrangements according to the external magnetic fields.

关键词： self-assembly nanoparticles core-shell magnetic

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Slow Photon Enhanced Photocatalytic Activity of ZnO Inverse Opal Film Synthesized by Sol-gel Method

Slow Photon Enhanced Photocatalytic Activity of ZnO Inverse ...

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International Conference on Nanoscience & technology,China 2013(ChinaNANO 2013)(中国国际纳米科学和技术大会)

作者： Jing Liu Jun Jin Shao-zhuan Huang Li Wang Chao Wang Yu Li Bao-lian Su Laboratory of Inorganic Materials Chemistry (CMI) The University of Namur (FUNDP)61 rue de BruxellesB-5000 NamurBelgium Laboratory of Living Materials at State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology122 Luoshi Road430070WuhanHubeiChina Laboratory of Living Materials at State Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of Technology122 Luoshi Road430070WuhanHubeiChina Department of Chemistry University of CambridgeLensfield RoadCambridge CB2 1EWUK

Recently, inverse opal structures, which have many potential applications in catalysts, separations, sensors, bioscience and photonics for their unique advantages such as highly ordered pore structure, large specific ... 详细信息

关键词： ZnO inverse opal film sol-gel method slow-photon photocatalysis

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A simultaneous thermal study in quantitative analysis of calcium oxalate hydrates

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Analytical Methods 2013年第24期5卷 6900-6903页

作者： Fei, Tao Hao, Xie Bao-Lian, Su Department of Biological Science and Biotechnology School of Science Wuhan University of Technology 122 Luoshi Road 430070 Wuhan China Lab. of Living Mat. at State Key Lab. of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi Road 430070 Wuhan China 61 rue de Bruxelles B-5000 Namur Belgium Department of Chemistry University of Cambridge Lensfield Road Cambridge CB2 1EW United Kingdom

The potential use of simultaneous thermal technology has been explored for quantifying mixed calcium oxalate monohydrate and dihydrate, which are major mineral components of urinary stones. Based on the observation and theoretical analysis of thermal dehydration of calcium oxalates, an effective and simple method has been developed for quantitative analysis of calcium oxalate hydrates. The present approach would be useful in medical practice and in quantifying inorganic hydrates with water-containing crystals similar to calcium oxalate hydrates. © 2013 The Royal Society of Chemistry.

关键词： Hydrates

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