備中国分寺和釘の酸化皮膜の調査(たたら製鉄による製品)(Part-1. 鉄の歴史 : その技術と文化)(<特集>鉄の技術と文化および循環型社会)

概要

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The ancient iron specimens are known to be highly corrosion resistant compared with the nowadays blast furnace iron In the case of Japanese nail prepared by "Kaji", the surface is covered by the oxide film which has grown at the forging In this work, to make how Japanese nail keeps high corrosion resistance clear, the structure characterization of the oxide film grown over the nail used at Bicchu-kokubun-ji temple by electron diffraction method was attempted The blast furnace iron was also similarly examined for comparison The main results obtained as follows (1) Japanese nail contained in quantity of non-metallic inclusion, mainly wustite (FeO) and silicate, was covered by dense and minute poly-crystal oxide film which the thickness was about 4μm, (2) The crystal unit size of the FeO was about 10nm, (3) While the FeO grown on the blast furnace iron was mono-crystal and the crystal unit size was about 3μm
社団法人日本鉄鋼協会の論文
2005-01-01