Abstract
The Mn-C system between 700° and 1110°C was reexamined by microscopic and X-ray diffraction methods. The results summarized in a phase diagram show cubic α-, β- γ-Mn, and hexagonal ∈ existing over appreciable ranges of composition, and cubic Mn23C6, hexagonal Mn15C4, orthorhombic Mn3C, monoclinic Mn5C2, and hexagonal (or trigonal) Mn7C3 as essentially line compounds. Room temperature lattice parameters of the quenched hexagonal ∈−Mn4C1+ X phase were found to increase froma h=2.685 (268.5) andc h=4.412¶ (441.2 pm) withX=−0.30 toa h=2.709 (270.9) andc h=4.429±0.001 ¶ (442.9 pm) withX=+0.06.
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ROBERT BENZ, formerly with the Research Staff, Massachusetts Institute of Technology, Cambridge, Mass. 02139
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Benz, R., Elliott, J.F. & Chipman, J. Solid phases of the Mn-C system. Metall Trans 4, 1449–1452 (1973). https://doi.org/10.1007/BF02667992
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DOI: https://doi.org/10.1007/BF02667992