Mode of transition from Hagg iron carbide to cementite. [Fe/sub 2/C. -->. Fe/sub 3/C]

Journal Article · Sat Dec 31 23:00:00 EST 1949 · J. Am. Chem. Soc.; (United States)

DOI:https://doi.org/10.1021/ja01166a088· OSTI ID:7091671

Cohn, E M; Hofer, L J.E.

The reaction of Haegg carbide, Fe/sub 2/C, to yield cementite, Fe/sub 2/C, and free carbon is a discontinuous or heterogeneous precipitation. Haegg carbide and cementite have narrow ranges of composition and apparently do not form intermediate metastable solid solutions. The reaction 3Fe/sub 2/C--Haegg ..-->.. 2Fe/sub 3/C + C becomes appreciable only at about 450/sup 0/, while the reaction Fe/sub 2/C--Haegg + Fe ..-->.. Fe/sub 3/C starts below 300/sup 0/. The ''unstable'' or ''labile'' carbide of Koelbel and co-workers is simply Haegg carbide.

• OSTI ID: 7091671
• 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

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALLOYS
CARBIDES
CARBON COMPOUNDS
CEMENTITE
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
HIGH TEMPERATURE
INTERMETALLIC COMPOUNDS
IRON CARBIDES
IRON COMPOUNDS
MAGNETISM
THERMOMAGNETISM
TRANSITION ELEMENT COMPOUNDS
YIELDS