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European Powder Metallurgy Congress and Exhibition, Euro PM 2007

作者： Gomes, U.U. Soares, S.R.S. Furukava, M. Oliveira, L.A. Souza, C.P. Federal University of Rio Grande do Norte - UFRN Materials Science and Engineering Pos-Graduate Program Campus Universitário 59072-970 Natal RN Brazil

ISBN: (纸本)9781899072293

The present study investigates the behavior of the sintering and micro-hardness of stainless steel samples reinforced with nanoparticles of tantalum carbide (TaC). The main aim was to identify the effect of the dispersion of carbides over the microstructure and the mechanical properties of the compacts. Samples of AISI 316L pure and with the addition of 3% wt TaC were cold compacted in a cylindrical steel die (Ø = 5.0 mm) at 700 MPa and sintered in a vacuum furnace. The heating rate and sintering temperature used were 20°C/min and 1290°C respectively during 60 minutes. The results show that the carbides distribution increases the sintering kinetics and micro-hardness of the samples. We have been able to produce sintered samples with a relative density between 91.0% and 93.0%. The highest micro-hardness values using a 10N load were 115 HV for the reinforced sample and 76 HV for the sample without reinforcement.

关键词： Sintering

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Synchrotron X-ray scattering studies of star-shape polymers

Synchrotron X-ray scattering studies of star-shape polymers

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2007 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2007

作者： Jin, S. Higashihara, T. Jin, K.S. Yoon, J. Heo, K. Kim, J. Kim, K.-W. Hirao, A. Ree, M. BK21 Program Polymer Research Institute Pohang University of Science and Technology Pohang 790-784 Korea Republic of Polymeric and Organic Materials Department Graduate School of Science and Engineering Tokyo Institute of Technology Tokyo 152-8552 Japan

Shapes and structures of star-polystyrenes bearing 6 to 57-arms were in detail investigated in good and theta solvents by small-angle X-ray scattering with synchrotron radiation sources.

ISBN: (纸本)1420063766

Shapes and structures of star-polystyrenes bearing 6 to 57-arms were in detail investigated in good and theta solvents by small-angle X-ray scattering with synchrotron radiation sources.

关键词： Polystyrenes

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Abstracts for the 6th Congress of Asian Sleep Research Society

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Sleep and Biological Rhythms 2009年第4期7卷 A1-A49页

作者： Seog Ju Kim In Kyoon Lyoo Yu-Jin Lee Do-Un Jeong Hirohiko Kanai Masanori Ookubo Atsushi Yoshimura Masako Okawa Noto Yamada Takeshi Munezawa Yoshitaka Kaneita Yoneatsu Osaki Hideyuki Kanda Tadahiro Ohtsu Masumi Minowa Kenji Suzuki Susumu Hijuchi Hiroyuki Suzuki Takashi Ohida Takashi Abe Yoko Komada Shoichi Asaoka Yuichi Inoue Jin-Seong Lee Sang-Yong Cho Deependra Kumar Hruda N. Mallick Velayudhan M. Kumar Mahesh K. Kaushik Akihiro Karashima Noiihiro Katayama Mitsuyuki Nakao Ravindra P. Nagendra Sathiamma Sulekha Sathyaprabha T. Narasappa Pradhan Nityanadan Bindu M. Kutty M. Nirmala P. N. Ravindra Basavaraj Ramappa Tubaki T. N. Sathyaprabha D. Sudhakar G. S. Lavekar C. R. Chandrashekar Kazuyoshi Kitaoka Mika Shimizu Sachiko Chikahisa Kazuo Yoshizaki Hiroyoshi Sei Jong-Won Kim Misa Takegami Shin Yamazaki Yasuaki Hayashino Rei Ono Koji Otani Miho Sekiguchi Shinichi Konno Shunichi Fukuhara Antonia J. Jakobson Paul Fitzgerald Russell Conduit Xin Shirley Li Siu Ping Joyce Lam Wai Man Mandy Yu Yun Kwok Wing Kazue Okamoto-Mizuno Koh Mizuno Mituaki Yamamoto Shuichiro Shirakawa Hirokazu Doi Mikako Kato Kazuyuki Shinohara Masako Tamaki Shiori Matsuda Katsuo Yamazaki Tadao Hori Keiko Ogawa Kazumi Takahashi Kunio Kitahama Katuo Yamazaki Yoshimasa Koyama Kohei Shioda Yugo Ueda Yukiko Nakamura Clara Inoue Kazushige Goto Sunao Uchida Yuko Morita Yoshiko Honda Tohru Kodama Mari Hagihara Toru Nakajima Masato Saito Yoshihiko Koga Shinichiro Tanaka Hiroshi Yamadera Madoka Takahara Sachiko Suwa Minoru Onozuka Sadao Sato Fumiharu Togo Taiki Komatsu Takeshi Mitani Jongbae Choi Bin Zhang Taeko Sasai Hiromi Mitsubayashi Mitsuhiro Ohtsu Isao Hasegawa Tatsuya Ishii Akira Komori Asami Suzuki Yue Nakahara Mitsuyasu Hiroki Mariko Nakauma Nobuo Someya Tomomasa Ochiai Shouhei Komori Rayleigh Ping-Ying Chiang Zai-Ting Yeh Seong T. Kim Seung H. Yoon Jeong S. Kwon Jong H. Choi Hyung J. Ahn Youngsoo Kim Bolortuya Yunren Lichao Chen Radhika Basheer Robert W. Mccarley Robert E. Strecker Makoto Honda Tetsuaki Arai Miyuki Fukazawa Yutaka Honda Kuniaki T Department of Psychiatry Gachon University of Medicine and Science Incheon Republic of Korea Department of Psychiatry Seoul National University Seoul Republic of Korea Department of Neuropsychiatry and Center for Sleep and Chronobiology Seoul National University Hospital Seoul Republic of Korea Department of Neuropsychiatry Seoul National University Hospital Seoul Republic of Korea Seoul National University Hospital Seoul Republic of Korea Department of Psychiatry Shiga University of Medical Science Otsu Japan Division of Public Health Department of Social Medicine Nihon University School of Medicine Tokyo Japan Department of Public Health Nihon University School of Medicine Tokyo Japan Division of Environmental and Preventive Medicine Department of Social Medicine Faculty of Medicine Tottori University Yonago Japan Department of Hygiene and Preventive Medicine Fukushima Medical University Fukushima Japan Department of Public Health Showa University School of Medicine Tokyo Japan Faculty of Humanities Seitoku University Matsudo Japan Section on Behavioral Science Division of Clinical Research National Hospital Organization Kurihama Alcoholism Center Yokosuka Japan Department of Otolaryngology Second Hospital Fujita Health University Nagoya Japan National Hospital Organization Kurihama Alcoholism Center Kanagawa Japan Metropolitan Police Department Criminal Investigation Laboratory Tokyo Japan Japan Somnology Center Neuropsychiatrie Research Institute Tokyo Japan Department of Somnology Tokyo Medical University Tokyo Japan Japan Somnology Center Neuropsychiatric Research Institute Tokyo Japan Department of Somnology Tokyo Medical and Dental University Tokyo Japan Center for Sleep and Chronobiology Department of Psychiatry and Behavioral Science Seoul National University College of Medicine Seoul Republic of Korea Department of Psychiatry and Behavioral Science Center for Sleep and Chronobiology Seoul Republic of Korea Department of Physiology Al

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A study on experimental evaluation for fracture behavior of carbon steel pipes for high pressure service with local wall thinning

A study on experimental evaluation for fracture behavior of ...

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作者： Ahn, Seok Hwan Seok, Kum Cheol Nam, Ki Woo School of Mechanical Engineering Pukyong National University San 100 Yongdang-dong Namgu 608-739 Busan Korea Republic of Department of UR Interdisciplinary Program Mechanical Engineering Graduate School Pukyong National University San 100 Yongdang-dong Nam-gu 608-739 Busan Korea Republic of Division of Materials Science and Engineering Pukyong National University San 100 Yongdang-dong Nam-gu 608-739 Busan Korea Republic of

The locally wall thinned phenomenon of pipes is simulated as metal loss due to erosion/corrosion. Therefore, fracture behaviors of pipes with local wall thinning are very important for the integrity of nuclear power plant. In this study, monotonic bending tests without internal pressure are conducted on 1.91-inch diameter Schedule 80 STS370 full-scale carbon steel pipe specimens. We investigated fracture strengths and failure modes of locally wall thinned pipes that welded and unwelded by four point bending test. From test results, we could be divided three types of failure modes.

关键词： Steel pipe

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Waters network's potential to transform environmental engineering education

Waters network's potential to transform environmental engine...

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114th Annual ASEE Conference and Exposition, 2007

作者： Eschenbach, Elizabeth Montgomery, Jami Johnson, James Brus, Chris Carlson, Patricia Giammar, Dan Grauer, Bette Hotaling, Liesl Oguntimein, Gbekeloluwa Safferman, Steven Wentling, Tim Humboldt State University United States Department of Environmental Resources Engineering Humboldt State University United States WATERS Network - CLEANER Project Office Network Howard University United States Department of Environmental Engineering College of Engineering Architecture and Computer Sciences Howard University United States American Academy of Environmental Engineers United States University of Iowa United States Program University of Iowa United States Rose-Hulman Institute of Technology United States Department of Rhetoric Rose-Hulman Institute of Technology United States National Research Council U. S. Air Force United States NASA's Classroom of the Future Wheeling WV United States Washington University United States Department of Energy Environmental and Chemical Engineering Washington University St. Louis United States Environmental Studies Program Center for Materials Innovation United States McPherson High School United States McPherson High School McPherson KS United States Stevens Institute of Technology United States Stevens Institute of Technology United States Morgan State University United States Michigan State University United States Biosystems and Agricultural Engineering Department Michigan State University United States University of Dayton United States Education Planning Committee National Center for Supercomputing Applications United States Department of Information Science Graduate School of Library and Information Science National Center for Supercomputing Applications University or Illinois United States Knowledge and Learning Systems Group NCSA United States

The WATERS Network (WATer and Environmental Research Systems Network) will be an integrated real-time distributed observing system which will enable academic and government scientists, engineers, educators, and practitioners to advance effective management of our nation's water resources by understanding human interactions with water and the natural and built environment. WATERS will provide easily accessible real time environmental data as well as analysis tools to engineers, scientists, educators, K- graduate students and policymakers so they can better understand how water quantity, quality and related components of the hydrologic cycle are impacted by natural and human influences. The WATERS strategic plan will be completed by July 2007 and requires constituent input. This paper describes the draft Conceptual Design and the Education Plan of WATERS Network. This paper will highlight the potential impact of WATERS on undergraduate and graduate environmental engineering education in order to elicit input from the environmental engineering education community on how WATERS Network could better meet the future needs of undergraduate and graduate students and educators. More information can be found at ***. © American Society for engineering Education, 2007.

关键词： Water resources

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Synthetic Paper from Plastic Waste: The Effect of CaCO3on Physical, Surface Properties and Printability

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Macromolecular Symposia 2007年第1期245-246卷

作者： Ana Carolina Corrêa Cristiano Ribeiro de Santi Sati Manrich Graduate Program of Materials Science and Engineering Federal University of São Carlos Brazil Department of Materials Engineering Federal University of São Carlos 3R- Residue Recycling Center Rod Washington Luís Km 235 13565-905 São Carlos-SP Brazil

This article is a description of recent work in the development of composite sheet materials from blends of recycled high-impact polystyrene (HIPS) and high-density polyethylene (HDPE), with a view to using them as synthetic paper for the printing trade. Four monolayer films of differing composition were characterized in terms of their physical and surface properties. They were further evaluated compared with each other and with commercial synthetic and cellulose papers, to discover relationships between CaCO 3 filler loadings, film structure and properties that could lead to improvements. In terms of their whiteness and water base inks printing properties, these sheets were generally inferior to the cellulose and synthetic papers. Notwithstanding this, in some tests they showed superior quality; thus, in offset printing, the high surface gloss, probably due to the HIPS content, made the colors brighter in some mono-oriented film samples.

关键词： fillers film surface properties polystyrene blends recycling waste

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Cover Picture: Influence of Plasma Stimulation on Si Nanowire Nucleation and Orientation Dependence (Adv. Mater. 18/2007)

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Advanced materials 2007年第18期19卷

作者： P. Aella S. Ingole W. T. Petuskey S. T. Picraux School of Materials Arizona State University Tempe AZ 85287 (USA) Department of Chemistry and Biochemistry Science and Engineering of Materials Graduate Program Arizona State University Tempe AZ 85287 (USA) Center for Integrated Nanotechnologies Los Alamos National Laboratory Los Alamos NM 87545 (USA)

On p. 2603, Tom Picraux and co‐workers report on the use of plasma excitation to strongly enhance the nucleation of Si nanowires by the vapor–liquid–solid growth method. This control allows the preferential formation of very small diameter [110] oriented nanowires, as well as significant enhancements in low temperature nanowire growth.

关键词： Nanowires, inorganic Plasmas Silicon Synthesis

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Aqueous tape casting of LZSA glass ceramics

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6th Pacific Rim Conference on Ceramic and Glass Technology, PacRim6

作者： Gomes, C.M. Biscaia, F.N. Quinaud, J.T. Montedo, O.R.K. Oliveira, A.P.N. Hotza, D. Graduate Program in Materials Science and Engineering - PGMAT Chemical Engineering Department - EQA Federal University of Santa Catarina Florianópolis SC 88040-900 Brazil

ISBN: (纸本)0470080507

The effect of sodium alginate, as binder, and polyethyleneglicol, as plasticizer, on rheological and mechanical properties of suspensions used in water-based tape casting of LZSA glass ceramics was studied. The investigation was carried out using a statistical design approach. An aqueous suspension of a parent glass from the LZSA (Li2O-ZrO2SiO 2-Al2O3) system was used. Viscosity, thixotropy and yield stress behavior were measured for the aqueous suspensions as a function of additive composition. Tensile strength of cast tapes was also measured. The experiments were shown to be statistically significant.

关键词： Glass ceramics

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Characterizations of trimetallic heteronuclear Bi1-xLa x[Fe(CN)6]·n(H2O) complexes and their thermal decomposition products

Characterizations of trimetallic heteronuclear Bi1-xLa x[Fe(...

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作者： Aono, Hiromichi Kondo, Nobuyuki Katagishi, Haruo Kurihara, Masato Sakamoto, Masatomi Sadaoka, Yoshihiko Department of Materials Science and Engineering Faculty of Engineering Ehime University Matsuyama 790-8577 Japan Graduate Program of Human Sensing and Functional Sensor Engineering Graduate School of Science and Engineering Yamagata University Yamagata 990-8560 Japan Department of Material and Biological Chemistry Faculty of Science Yamagata University Yamagata 990-8560 Japan

Heteronuclear Bi1-x La x [Fe(CN)6] &middotnH2O complexes were synthesized, and their crystal structures and thermal decomposition process were investigated by X-ray diffraction (XRD), thermogravimetry analysis (TG... 详细信息

Heteronuclear Bi1-x La x [Fe(CN)6] ·nH2O complexes were synthesized, and their crystal structures and thermal decomposition process were investigated by X-ray diffraction (XRD), thermogravimetry analysis (TGA), Auger electron spectroscopy (AES) with scanning electron microscope (SEM), and transmission electron microscopy (TEM). The crystal system of the complexes was orthorhombic having n = 4 for x = 0-0.7 and was hexagonal having n = 5 for x = 1.0. Their mixture was confirmed for x = 0.8 and 0.9. The lattice parameters for the orthorhombic increased with increasing the x value for the complexes. The single phase of trimetallic perovskite-type Bi1-x La x FeO3 was obtained by its thermal decomposition at low temperature. The crystal system was hexagonal for BiFeO3 (x = 0) and orthorhombic for x = 0.1-1.0. In the case of the decomposed perovskite sample, the lattice parameters decreased with increasing x values for Bi1-x La x FeO3. The particle size was ca. 30 nm for Bi0.2La0.8FeO3 obtained by thermal decomposition at 500 °C and it grew with an increase in decomposition temperature. For the Bi0.5La0.5FeO 3, AES showed that the elemental distributions of Bi, La, and Fe on the surface were very homogeneous for the sample decomposed at 700 °C.

关键词： Bismuth compounds

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Low-temperature sintered LZSA cellular glass ceramics

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6th Pacific Rim Conference on Ceramic and Glass Technology, PacRim6

作者： Sousa, E. Rambo, C.R. Hotza, D. De Oliveira, A.P. Novaes Fey, T. Graduate Program on Materials Science and Engineering - PGMAT Department of Chemical Engineering - EQA Federal University of Santa Catarina P.O. Box 476 88040-900 Florianópolis SC Brazil Department of Materials Science Glass and Ceramics University of Erlangen-Nuremberg Martensstrasse 5 D-91058 Erlangen Germany

ISBN: (纸本)0470080507

Commercial polyurethane foams with a monomodal pore size distribution were used to produce LZSA glass ceramic foams by the polymeric sponge method. A suspension containing LZSA glass ceramic, bentonite and sodium silicate, was prepared in water and isopropanol media to impregnate the polymeric foams by dip coating. The suspension was characterized by Theological measurements. The effect of the solvent on the microstructure and physical properties on the LZSA foams was also evaluated. The cellular microstructure of the glass-ceramic foams was characterized by scanning electron microscopy (SEM) and micro-computer X-ray tomography (μ-CT). The LZSA foam prepared with isopropanol suspension exhibited higher mechanical strength under compression than those prepared with water.

关键词： Glass ceramics

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