著者

亀本 雄一郎 高橋 良寿 山岸 滋

出版者

一般社団法人 日本原子力学会

雑誌

日本原子力学会誌 (ISSN:00047120)

巻号頁・発行日

vol.6, no.2, pp.71-76, 1964-02-29 (Released:2009-03-26)

参考文献数

4

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The studies on corrosion of impermeable graphite by molten bismuth and molten bismuth-lead alloy were made under several conditions. The graphite samples, which were isothermally immersed in molten bismuth or bismuth-lead alloy at 450°, 550° or 700°C for 210 hr, were observed changes in neither weighing test nor microscopic test.If the thermal cycle of heating (550°C)-cooling (solidification) was added to the bismuth in which the graphite samples were dipped, the cracks were induced in the samples. It was found by the microscopic method and the autoradiography that the result abovementioned was caused by the volume expansion of bismuth. When the bismuth filled in pin-holes of graphite solidified, the bismuth expand and spread the pin-holes. These pin-holes were connected each other and grew into cracks.