Al-rich portion of the Al-Hf phase diagram |
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Authors: | Rokhlin L L Bochvar N R Dobatkina T V Leont’ev V G |
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Affiliation: | (1) Baikov Institute of Metallurgy and Materials Science RAS, Moscow, Russia;(2) Alcoa Technical Center, Pittsburgh, PA, USA |
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Abstract: | Electrical resistivity measurements, differential thermal analysis, optical microscopy, and the deposition of hafnium compound
particles from a melt are used to study the Al-rich portion of the Al-Hf phase diagram. Prominence is given to the hafnium
solubility in solid and liquid aluminum. The studies show a peritectic character of the invariant reaction during the solidification
of alloys with sufficiently high hafnium contents and a slight difference between the peritectic and melting temperatures
of pure aluminum. The hafnium solubility in solid and liquid aluminum is shown to increase with the temperature. The hafnium
solubility in solid aluminum at the peritectic temperature (maximum solubility) is 1.00 wt % (0.153 at %); the hafnium solubility
in liquid aluminum at this temperature is 0.43 wt % (0.065 at %). |
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