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http://dx.doi.org/10.3365/KJMM.2012.50.4.324

Material Degradation of Ancient Iron Pot by Repeated Heating for One Thousand Years  

Go, Hyeong (Gangwon Research Institute of Cultural Properties)
Han, Min Su (Conservation Science Division, National Research Institute of Cultural heritage)
Choe, Byung Hak (Department of Metal & Materials Engineering, Gangneung-wonju National University)
Min, Doo Sik (Department of Metal & Materials Engineering, Gangneung-wonju National University)
Shim, Yun Im (Department of Metal & Materials Engineering, Gangneung-wonju National University)
Jeong, Hyo Tae (Department of Metal & Materials Engineering, Gangneung-wonju National University)
Cho, Nam Chul (Department of Cultural Heritage Conservation Science, College of National, Kongju University)
Publication Information
Korean Journal of Metals and Materials / v.50, no.4, 2012 , pp. 324-330 More about this Journal
Abstract
The microstructural changes of three pieces from an ancient iron pot were studied in order to identify present the material degradation due to repeated heating for one-thousand years. The microstructures of the pieces were divided into the areas of ferrite/graphite, ferrite/pearlite, and corroded oxidation. The area of ferrite/graphite was undergone by severe Galvanic corrosion, but that of ferrite/pearlite was not even during a thousand years' using. The shape of the graphites was coexisted with types of A, B, and C of as modern graphite classification. In the ferrite/pearlite area, abnormal acicula precipitates with a high aspect ratio of $0.2{\mu}m$ thickness and several hundreds ${\mu}m$ length were presented. They might be a kind of carbide in the ferrite matrix with its special precipitate plane.
Keywords
ancient iron pot; microstructural change; ferrite/graphite/pearlite; high aspect ratio carbide;
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