The Ni3Al-Ni3Cr-Ni3Ru section of the Ni-Cr-Al-Ru system |
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Authors: | S. Chakravorty H. Hashim D. R. F. West |
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Affiliation: | (1) Department of Metallurgy and Materials Science, Imperial College of Science and Technology, SW7 2BP London, UK |
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Abstract: | An investigation is reported of the 75 at% nickel section of the Ni-Cr-Al-Ru system at 1523 and 1273 K. Constitutional data obtained by electron probe microanalysis, X-ray diffraction and microscopical examination are presented as partial isothermal sections. At 1523 K, the major part of the section consists of phase, while the aluminium-rich region contains a and+ region; the extent of the solid solution of chromium and ruthenium in totals ~ 4 at%. The ruthenium-rich corner of the section shows a two-phase region consisting of + ruthenium-rich solid solution. At 1273 K the,+ and + ruthenium regions increase in extent. The/ mismatch values in the equilibrated alloys studied lie in the range ~ –0.08 to –0.39%. Constitutional features of as-cast alloys are also reported. |
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