著者

大橋 徹郎 広本 健 藤井 博務 塗 嘉夫 浅野 鋼一

出版者

社団法人日本鉄鋼協会

雑誌

鐵と鋼 : 日本鐡鋼協會々誌 (ISSN:00211575)

巻号頁・発行日

vol.62, no.6, pp.614-623, 1976-05-01

被引用文献数

5

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As a part of the study on the effect of oxides on heterogenuous nucleation during iron solidification, the effects of Al_2O_3, SiO_2, and rare earth oxides were examined, by measuring the critical supercooling of 300 g electrolytic iron under special slag in a Tammann furnace. The following results have been obtained. 1) The critical supercooling for heterogenuous nucleation is remarkably lowered than that of homogenuous nucleation. This value is 3℃ by the addition of R.E.M, and this is extremely small when compared with 14℃ by Al_2O_3, 30℃ by SiO_2, and 53℃ by MnO. 2) The heterogenuous nucleating potency of oxide catalyzers is dependent upon the difference of interfacial energy between the oxide substrate and δ-Fe. This interfacial energy can be theoretically explained by the disregistry between both crystals.