Abstract
A TERNARY intermetallic phase with the approximate composition MgCrAl8, called the E-phase, was observed by Erdmann-Jesnitzer1 in his examination of the magnesium–chromium–aluminium system. Little, Axon and Hume-Rothery2 found that the magnesium content of the E-phase can vary considerably, and that, furthermore, zinc is soluble in the phase to some extent. Crystals extracted from two ternary alloys were found on analysis to have the compositions Mg3Cr2.01Al24.2 and Mg3Cr2.01Al26.4, and those of an E-phase sample containing zinc were found to have the composition Mg3Cr1.52Zn0.06Al16.4. The results of micrographic investigation indicated that the range of composition extends at least from Mg3Cr2Al25 to Mg3Cr1.3Al15.
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References
Erdmann-Jesnitzer, F., Aluminum-Archiv, 29 (1940).
Little, K., Axon, H. J., and Hume-Rothery, W. J., J. Inst. Met., 75, 39 (1948).
“International Tables for X-Ray Crystallography” (The Kynoch Press, Birmingham, 1952).
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SAMSON, S. Crystal Structure of the Intermetallic Compound Mg3Cr2Al18. Nature 173, 1185–1186 (1954). https://doi.org/10.1038/1731185a0
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DOI: https://doi.org/10.1038/1731185a0
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