Setsuo Yamamoto

Yamaguchi University

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H. Kurisu

Yamaguchi University

Mitsuru Matsuura

The Open University of Japan

Mitsuru Akashi

Osaka University

Hidetoshi Kita

Yamaguchi University

Hisatoshi Kobayashi

Tokyo Medical and Dental University

Ichiro Terasaki

Nagoya University

Hajime Ohgushi

Kuma Hospital

Junzo Tanaka

Tokyo Institute of Technology

Kazuhiko Hashimo

The University of Tokyo

Ryoji Funahashi

National Institute of Advanced Industrial Science and Technology

Cooperative Institutions

Yamaguchi University

Tohoku University

Osaka University

The University of Tokyo

Tokyo Institute of Technology

Kyoto University

National Institute of Advanced Industrial Science and Technology

Nagoya University

Kyushu University

Japan Science and Technology Agency

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Surface Analysis of Surface Finished Aluminum Alloys with a Low Outgassing Property

Vacuum and Surface Science (2022)

Naoki Ogawa H. Kurisu Setsuo Yamamoto

Optimized mechanical grinding (OMG) was developed as a low outgassing surface finishing for aluminum alloys (A5052). Surface morphology and depth profile for aluminum alloys with four types of surface finishes, i.e. conventional mechanical grinding (MG), mechanical grinding with optimized process (OMG), combination of mechanical grinding and chemical polishing (MG+CP) and combination of optimized mechanical grinding and chemical polishing (OMG+CP), were investigated using Atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS). The surfaces of MG and MG+CP were rough, whereas OMG and OMG+CP were smooth. The composition of the surface layer of MG was composed of Al2O3 and γ–AlOOH, whereas OMG, MG+CP, and OMG+CP was composed of Al2O3. Therefore, OMG was considered to have low outgassing property due to the smooth surface and thin surface oxide layer compose of Al2O3, which were originated from the small surface alteration by the processing.

Outgassing

10.1380/vss.65.145

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Citations (1)

Extended Summaries

IEEJ Transactions on Fundamentals and Materials (2013)

Toshiya Member Koichi Ishida Akio Tanaka Member Setsuo Yamamoto Tohru Takanaka

10.1541/ieejfms.133.es8_1

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Synthesis and Thennoelectric Properties of Doped NaCo2O4 with Transition Metal Cations

Kazuya Okamoto Hidetoshi Kita Noriaki Nakayama Setsuo Yamamoto Mitsuru Higa

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COMPARISON BETWEEN LONGITUDINAL AND PERPENDICULAR MAGNETIC RECORDING AND REPRODUCE MECHANISMS

テレビジョン学会技術報告 (1991)

I. Tagawa Setsuo Yamamoto Yukiya SHIMIZU Yoshihisa Nakamura

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Effects of Composition on Microstructure and on Thermal Stability of Sn-Ag-In Lead-Free Soldered Joints

Kazuya Okamoto Hidetoshi Kita Noriaki Nakayama Setsuo Yamamoto Mitsuru Higa

Lead (geology)

Thermal Stability

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Vacuum Characteristics of Titanium Materials and Applications to UHV Systems

Shinku (2007)

H. Kurisu Setsuo Yamamoto Mitsuru Matsuura Takashi Morimoto Masaki HESAKA

This paper reviewed the vacuum characteristic of titanium materials and applications to an UHV system of the current research and development. It has been found that the outgassing rate of the titanium material is very low compared with an existing material such as a stainless steel or an aluminum alloy, and the UHV system made of the titanium material has very high vacuum performance, e.g., very quick pumping and the achievement of UHV/XHV pressure under the simple pre-baking condition.

Outgassing

Titanium alloy

Ultra-high vacuum

10.3131/jvsj.50.41

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Hydrogen distribution in titanium materials with low outgassing property

Vacuum (2009)

Masatoshi Takeda H. Kurisu Setsuo Yamamoto Hamazo Nakagawa

Outgassing

Titanium oxide

10.1016/j.vacuum.2009.07.008

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Citations (9)

Low-Loss Co<sub>2</sub>-Y Ferrites with Added CuO Sintered in Air for High Frequency Application

Materials Sciences and Applications (2014)

Shigeo Fujii Koji Wakamatsu Hiroshi Satoh Setsuo Yamamoto

The sintering characteristics of hexagonal Co2-Y-type ferrite, Ba2Co2Fe12O22, with the addition of 0.6 wt% CuO, were studied in order to allow for preparation in air, as opposed to the conventionally recommended O2, for industrial production. The dependence of the resistivity, ρ magnetic loss, tanδ, and the permeability, μ, at 1 GHz on the sintering temperature was investigated. A low tanδ of 0.05 with a m of 2.7 at a frequency of 1 GHz, along with a high ρ (up to 7 × 104 μm), were attained under sintering at 1170°C in air, which were the same features as those of samples sintered at 1200°C in O2. The dependence of tanδ on grain diameter was also examined, and it was determined that a small grain size (less than 2 μm) is preferable for low tanδ.

10.4236/msa.2014.513099

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Reaction Pathway Analysis of 1-Hexyl Alcohol in Water at Hydrothermal and Supercritical Conditions

Koji Okamoto Hidetoshi Kita Noriaki Nakayama Setsuo Yamamoto Mitsuru Higa

Supercritical water oxidation

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Electronic structure on quaternary Si-based Clathrates Rb-Na-X-Si (X=Ga, Zn)

The Japan Society of Applied Physics (2016)

Koji Akai Kengo Kishimoto T. Koyanagi Setsuo Yamamoto

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