Hao Wang, Guangming Cao, Wentao Song, Zhifeng Li, Zhenyu Liu
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引用次数: 0
Abstract
The eutectoid reaction in FeO scale was examined by thermogravimetric analysis. The oxidized specimens were held isothermally from 100 s to 50,000 s in the temperature range from 300 to 550 ℃. Under a variety of temperature and temporal circumstances, experiments were conducted and the results analyzed using an electron probe micro-analyzer. The findings demonstrate that FeO forms an eutectoid consisting of Fe3O4 and Fe at 300–500 ℃. An experimentally derived TTT diagram of the evolution of the FeO phase change shows eutectoid C-curves with nose temperatures of roughly 425 ℃. The primary factor in the formation of eutectoid product is the local position of Fe supersaturation, which is not directly related to the Fe3O4 seam layer that forms. There exists a “white area” in the front of eutectoid phase transformation before stable eutectoid structure layered formed. Rods of Fe can be formed in eutectoid transformation. The lamellar spacing in the eutectoid product at different temperatures was obtained by calculation and verified by experimental results.
期刊介绍:
Oxidation of Metals is the premier source for the rapid dissemination of current research on all aspects of the science of gas-solid reactions at temperatures greater than about 400˚C, with primary focus on the high-temperature corrosion of bulk and coated systems. This authoritative bi-monthly publishes original scientific papers on kinetics, mechanisms, studies of scales from structural and morphological viewpoints, transport properties in scales, phase-boundary reactions, and much more. Articles may discuss both theoretical and experimental work related to gas-solid reactions at the surface or near-surface of a material exposed to elevated temperatures, including reactions with oxygen, nitrogen, sulfur, carbon and halogens. In addition, Oxidation of Metals publishes the results of frontier research concerned with deposit-induced attack. Review papers and short technical notes are encouraged.