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Mode of transition from Haegg iron carbide to cementite

Journal Article · · J. Am. Chem. Soc.; (United States)
DOI:https://doi.org/10.1021/ja01166a088· OSTI ID:5280066

By means of thermomagnetic studies it was concluded that: The reaction of Hagg carbide, Fe/sub 2/C, to yield cementite, Fe/sub 3/C, and free carbon is a discontinuous (or heterogeneous) precipitation. Hagg carbide and cementite have narrow ranges of composition and apparently do not form intermediate metastable solid solutions. The reaction 3Fe/sub 2/C--Hagg ..-->.. 2Fe/sub 3/C + C becomes appreciable only at about 450/sup 0/, while the reaction Fe/sub 2/C--Hagg + Fe ..-->.. Fe/sub 3/C (described elsewhere) starts below 300/sup 0/. The ''unstable'' or ''labile'' carbide of Kolbel and co-workers is simply Hagg carbide.

OSTI ID:
5280066
Journal Information:
J. Am. Chem. Soc.; (United States), Journal Name: J. Am. Chem. Soc.; (United States) Vol. 72; ISSN JACSA
Country of Publication:
United States
Language:
English

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