Difference between revisions of "Cementite"
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== Description == | == Description == | ||
| − | A hard, brittle material composed of iron carbide. Cementite is present in nearly all iron-carbon alloys, such as [ | + | A hard, brittle material composed of iron carbide. Cementite is present in nearly all iron-carbon alloys, such as [[steel]] and [[cast iron]]. It is a metastable phase that will decompose to form [[graphite]] and [[iron]]. Although in steel, this decomposition rarely occurs. Most cast irons contain some free graphite because the [[silicon]] content of cast iron makes cementite less stable. |
== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
Revision as of 18:14, 12 January 2014
Description
A hard, brittle material composed of iron carbide. Cementite is present in nearly all iron-carbon alloys, such as Steel and Cast iron. It is a metastable phase that will decompose to form Graphite and Iron. Although in steel, this decomposition rarely occurs. Most cast irons contain some free graphite because the Silicon content of cast iron makes cementite less stable.
Synonyms and Related Terms
iron carbide; cohenite; Železo (Ces.); Zementit (Deut.); cémenite (Fr.); cementiet (Ned.); cementyt (Pol.); cementite (Port.)
Other Properties
Orthorhombic crystal system
| Composition | F3C |
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Authority
- G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 156
- Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
- David C. Scott, Metallography and Microstructure of Ancient and Historic Metals, The Getty Conservation Institute, Los Angeles, 1991
- Wikipedia, the free encyclopedia, at http://www.wikipedia.com Comment: http://en.wikipedia.org/wiki/Iron_carbide (Accessed Mar. 1, 2006)
- Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
- The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998