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

Journal Article · Sun Jan 01 00:00:00 EST 1950 · 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), Vol. 72
• Country of Publication: United States
• Language: English

Related Subjects

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