著者

鳥越 泰彦

出版者

公益財団法人 日本学術協力財団

雑誌

学術の動向 (ISSN:13423363)

巻号頁・発行日

vol.13, no.10, pp.8-12, 2008-10-01 (Released:2012-02-15)

著者

小川 和洋 庄子 哲雄 青木 久彦 藤田 範生 鳥越 泰治

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集. A編 (ISSN:03875008)

巻号頁・発行日

vol.66, no.647, pp.1370-1376, 2000-07-25

被引用文献数

4 2

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A two-layer plasma sprayed thermal barrier coating on Ni base superalloy substrate was characterized. The coating was comprised of an inner layer of MCrAlY bond coating and an outer layer of 8wt% yttria stabilized zirconia (YSZ) thermal barrier coating (TBC). After aging, the reaction layer at interface between YSZ and MCrAlY was observed. The reaction layer had two different contrast layers in the SEM images. One was black which was closer to MCrAlY and the other was gray which was closer to YSZ. The thickness of both layers increased with aging. Also countless porosities at the gray layer and microcrack at YSZ were observed. Most of the macrocrack grew through the porosities. From this viewpoint one may say that the mechanism of macrocrack formation is a deterioration of adhesion which was accompanied by an increase of the porosities or the microcrack.

著者

鳥越 泰彦 近藤 孝弘 篠原 琢 南塚 信吾 柴 宜弘

出版者

東欧史研究会

雑誌

東欧史研究 (ISSN:03866904)

巻号頁・発行日

vol.24, pp.62-104, 2002 (Released:2019-04-14)

著者

鳥越 泰彦

出版者

東欧史研究会

雑誌

東欧史研究 (ISSN:03866904)

巻号頁・発行日

vol.14, pp.20-39, 1991 (Released:2018-12-01)

著者

鳥越 泰 市野 隆英 中野 昌信

出版者

社団法人 腐食防食協会

雑誌

防食技術 (ISSN:00109355)

巻号頁・発行日

vol.28, no.6, pp.343-347, 1979

被引用文献数

2

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In view of increasing trend of applying water cooling to electric machines, investigation has been made on corrosion of the copper pipe that is comprised in the internally water cooled power cable. Practical tests on corrosion of the copper pipe by flowing pure water were carried out using actual power cable under practical use conditions with regard to conductivity, temperature, and oxygen content of water, and flow velocity. The ranges of flow velocity were chosen to be much wider than could be encountered in the actual cooling system. Corrosion quantity of the copper pipe was determined from analyzed data on ion exchange resin and filter. The result of two times corrosion tests made about one year, in state where water temperature are below 80°C and flow velocity are below 3m/s, are as fellows. (1) Corrosion rate of the copper pipe reached 2μ/year, but the traces of pitting corrosion was not detected. (2) By electrolytic reduction, predominant component of black corrosion products on the copper pipe surface was identified with CuO. (3) Corrosion products were found to have considerable effect on stifling corrosion rate.