Search Results 1-20 of 664

  • Leak-before-break and plastic collapse strength evaluation of stainless steel piping with a part-through notch

    OGAWA Masato , MATSUBARA Masaaki , SUZUKI Ryosuke

    … <p>Nuclear power plants and chemical plants contain many piping, which degrades with age. … A part-through notch with a notch angle of 90° was cut in the center of the specimen by wire electric discharge machining. …

    Mechanical Engineering Journal, 2020

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  • 中性子集光用高精度Wolterミラーマンドレルの作製(第7報):PCVM加工における熱流入由来の加工量誤差の補正  [in Japanese]

    Arakawa Shohei , Yamamoto Yugo , Kawai Kentaro , Arima Kenta , Yamazaki Dai , Maruyama Ryuji , Hayashida Hirotoshi , Soyama Kazuhiko , Yamamura Kazuya

    <p>我々は大気圧マイクロ波プラズマジェットを用いたNC-PCVMによる,中性子顕微鏡用Wolterミラーの作製に取り組んでいる.PCVMは化学的な加工法であるため,加工速度は表面温度に依存する.マンドレルは先細り形状の合成石英棒であるため,プラズマ照射時の温度上昇は先端ほど大きく,加工速度の上昇分を照射時間で補正する必要がある.本報ではプラズマの照射時間補正後にマンドレルを形状修正し …

    Proceedings of JSPE Semestrial Meeting 2019A(0), 695-695, 2019

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  • Effects of Casting Surface on Correlation between Eddy Current Signal and Pearlite Area Ratio in Eddy Current Testing of Ductile Cast Iron  [in Japanese]

    Horikawa Noritaka , Wang Lin

    … <p>  The microstructure and mechanical properties of ductile cast iron are affected by the chemical compositions and thickness of casting products. … One of the surfaces of the specimen was machined by face milling, and annealed after machining. …

    Journal of Japan Foundry Engineering Society 91(12), 850-855, 2019

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  • LEAK BEFORE BREAK AND PLASTIC COLLAPSE STRENGTH EVALUATION OF STAINLESS STEEL PIPING WITH A PART THROUGH NOTCH

    Ogawa Masato , Matsubara Masaaki , Suzuki Ryosuke

    … Nuclear power plants and chemical plants contain a large amount of piping, which becomes degraded with age. … A part-through notch with an angle of 90° was cut at the center of the specimen using wire electric discharge machining. …

    The Proceedings of the International Conference on Nuclear Engineering (ICONE) 2019.27(0), 1798, 2019

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  • Leukocyte telomere length is not affected by long-term occupational exposure to nano metal oxides

    HUBACEK Jaroslav A. , SCHWARZ Jaroslav , POPOV Alex , KRUMAL Kamil , LANSKA Vera , COUFALIK Pavel , ZAKHAROV Sergej , ZDIMAL Vladimir , PELCLOVA Daniela , DLOUHA Dana , MIKUSKA Pavel , DVORACKOVA Stepanka , VLCKOVA Stepanka , FENCLOVA Zdenka , ONDRACEK Jakub , KOSTEJN Martin

    <p> The aim of this study was to ascertain whether long-term occupational exposure to nanoparticles would affect relative leukocyte telomere length (LrTL). We analysed occupati …

    Industrial Health 57(6), 741-744, 2019

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  • Outgassing Properties of Aluminum with Surface Treatment (IV)  [in Japanese]

    Ogawa Naoki , Kittaka Ryouji , Kurisu Hiroki , Yamamoto Setsuo

    <p>半導体デバイス製造装置向けの,ガス放出を極端に少なくする真空材料用表面処理および加工処理を開発するに先立ち,極微量のガス放出量を評価することが可能なガス放出速度測定装置を開発した.未処理(素材面),機械研削,化学研磨など,計5種類の表面処理を施工したアルミニウム試料を準備し、開発したガス放出速度測定装置を使用して,真空ベーキング無および有のガス放出速度を測定し,比較評価をおこなっ …

    Abstract book of Annual Meeting of the Japan Society of Vacuum and Surface Science 2019(0), 1P08, 2019

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  • Improvement of sliding durability of concentrated polymer brush by surface texturing  [in Japanese]

    KODAMA Eri , SATO Keisuke , TSUJII Yoshinobu , SASAKI Shinya

    … Some previous studies focused on the chemical methods, which are not sufficient enough to improve the durability of CPBs under the sliding conditions. … Surface textures were machined on the steel surfaces by using the precise picosecond-laser machining (PiCooLs, L.P.S. Works, JP). …

    The Proceedings of Conference of Kanto Branch 2019.25(0), 18E10, 2019

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  • Evaluation of AFM polishing technique by optical fiber end face nano-micromachining  [in Japanese]

    MATSUI Shinsuke , KIMURA Kenoshin

    … <p>Nano-micro scratch machining was done by Atomic force microscopy (AFM) to investigate the fundamental characteristics of the polishing. … The machining was done with an AFM tip which can be assumed to a nano-shape cutting edge of an abrasive, and with the machining load which is controlled by the AFM cantilever system. … The machining environment was water changing its pH; …

    The Proceedings of Conference of Kanto Branch 2019.25(0), 18D10, 2019

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  • Development of chemical machining process for metalsusing hydrogen based high pressure plasma  [in Japanese]

    Ando Takuhiro , Shirasu Yoshiki , Kakiuchi Hiroaki , Yasutake Kiyoshi , Ohmi Hiromasa

    <p>化学反応を利用した金属加工技術は、種々のデバイスを製造する上で欠くことのできない基礎的な製造技術となっているが、多くの場合、危険で環境負荷の高い薬品と廃液を伴う。本研究では、金属のエコクリーンな化学エッチングを実現するため、ユビキタスな改質ガスを含んだ水素ベース高圧プラズマを用いた化学エッチング法の開発を進めている。今回は、種々の金属に対する本手法の加工特性を調査したので、その結 …

    Proceedings of JSPE Semestrial Meeting 2019S(0), 775-776, 2019

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  • Fundamental Study on Chemical Reactivity of Organic Material and Glass  [in Japanese]

    Guo Jianli , Matsuzawa Yusuke , Mimura Hidekazu

    <p>先行研究では、アクリル酸などの有機粒子を砥粒として用いた高空間分解能なガラス加工法が開発されている。有機粒子は、密度が低く、硬度が低いため、スラリー中での分散性が高く、被加工物を損傷させにくい。これまで石英ガラスの除去加工に使用されているが、その加工原理は明らかではない。本研究では、有機材料とガラスの反応性の仮説を立て、実験装置の設計、温度やpHなどの実験条件の変更、実験結果の比 …

    Proceedings of JSPE Semestrial Meeting 2019S(0), 666-667, 2019

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  • 電解複合ワイヤーソーによるSiC切断の有効性検証  [in Japanese]

    Kudo Hinako , Natsu Wataru , Noda Daisuke

    <p>高硬度かつ耐摩耗性や耐熱性に優れている炭化ケイ素(SiC)は,高温下での安定性やその熱伝導性から過酷な環境で用いる部材や半導体材料として注目されているが,その脆さと硬さ故に従来の機械的な加工が難しい材料として知られている.本研究では,電解反応によりSiC表面に母材より柔らかい酸化被膜を生成し,ワイヤーソーで被膜を除去することで加工を進める電解複合ワイヤーソーを提案し,SiCの切断 …

    Proceedings of JSPE Semestrial Meeting 2019S(0), 271-272, 2019

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  • Evaluation of Machined Surface Texture for Single-crystal Si Wafer by Four-point Bending Tests  [in Japanese]

    FUJII Tatsuya , MURAKAMI Takuto , WU Yongbo , NOMURA Mitsuyoshi

    …    Chemical mechanical polishing (CMP) is one of the effective surface-finishing methods for machining Si wafers. … As a promising technology for the machining of large-sized Si wafer, chemo-mechanical grinding (CMG) integrates the advantages of fixed abrasive machining and CMP process, and hence can generate superior surface quality comparable to that by CMP while maintaining the high geometric accuracy. …

    Journal of the Japanese Society for Experimental Mechanics 19(2), 131-136, 2019

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  • Surface Finishing Method Using Plasma Chemical Vaporization Machining for Narrow Channel Walls of X-Ray Crystal Monochromators

    Hirano Takashi , Morioka Yuki , Matsumura Shotaro , Sano Yasuhisa , Osaka Taito , Matsuyama Satoshi , Yabashi Makina , Yamauchi Kazuto

    … This paper proposes a high-precision surface finishing method for the narrow-channel inner walls based on plasma chemical vaporization machining, which is a local etching technique using atmospheric-pressure plasma. …

    International Journal of Automation Technology 13(2), 246-253, 2019

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  • Special Issue on Precision Surface Finishing

    Shiou Fang-Jung , Enomoto Toshiyuki

    … </p><p>- Ultraprecision surface machining and finishing with compensated feeding mechanisms. … </p><p>- Chemical-mechanical polishing of single-crystal SiC and GaN wafers. …

    International Journal of Automation Technology 13(2), 173-173, 2019

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  • In vitro degradation and mineralization of strontium-substituted hydroxyapatite coating on magnesium alloy synthesized via hydrothermal route

    LI Yue , XU Guohua , SHEN Sibo , ZHU Lingjun , CAI Shu , JIANG Yangyang , LING Rui , JIANG Song , LIN Yishu , HUA Shaoshuai

    <p>Magnesium (Mg) and its alloy as promising biodegradable orthopaedic implants have gained immense attention by virtue of their superior biocompatibility and mechanical compatibility. In order …

    Journal of the Ceramic Society of Japan 127(3), 158-164, 2019

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  • Imparting Biocompatibility to Zirconia Implants with Nanosecond Pulsed Laser: Formation of Microgrooves and Investigation of Heat Effects  [in Japanese]

    Harai Tomohiro , Hirota Masatsugu , Hayakawa Tohru , Shimada Keita , Mizutani Masayoshi , Kuriyagawa Tsunemoto

    … <p>The purposes of this study were to evaluate the microstructures and chemical composition changes of the surface of tetragonal zirconia polycrystal (TZP) after irradiation of nanosecond pulsed laser and to consider the effects for biocompatibility. … To identify the chemical composition changes, the samples were characterized using X-ray diffraction (XRD), energy dispersive X-ray spectrometry (EDX) and X-ray photoelectron spectroscopy (XPS). …

    Journal of the Japan Institute of Metals and Materials 83(2), 37-45, 2019

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  • Deposition of Trace Coolant Elements on Flank Face in Turning of mboxInconel 718 Under High Pressure Conditions

    Obikawa Toshiyuki , Fang Zhenglong , Matsumoto Wataru , Hayashi Mamoru , Hattori Hideaki , Morigo Chikara

    … The flank wear-land was inspected after the cutting experiments using energy dispersive X-ray spectroscopy analysis to obtain the mappings of chemical elements contained in the workpiece, coating material, and coolant. … Trace chemical elements contained in the coolant were mainly detected along the border of the tool-work contact area. …

    International Journal of Automation Technology 13(1), 41-48, 2019

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  • Electro Chemical Multifunction Grinding Machine (EMG) : Improvement of Processing Properties of EMG  [in Japanese]

    小尾 伸昭 , 釼持 勝彦 , 塚田 直樹

    電気加工学会誌 = Journal of the Japan Society of Electrical Machining Engineers 52(131), 227-231, 2018-11

  • Report of 19th CIRP Conference on Electro Physical and Chemical Machining (ISEM 19th)  [in Japanese]

    吉田 政弘

    電気加工学会誌 = Journal of the Japan Society of Electrical Machining Engineers 52(130), 103-105, 2018-07

  • Nano-Scale Machining of Single-Crystal Diamond by Thermo-Chemical Reaction  [in Japanese]

    閻 紀旺

    化學工業 69(5), 349-355, 2018-05

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