Journal
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
Volume 54, Issue 2, Pages 391-398Publisher
SPRINGER
DOI: 10.1007/s11661-022-06911-y
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The discovery of a quaternary eutectic reaction in the Al5Ce3Si0.5Mg alloy, which was not anticipated based on existing phase diagrams and computational thermodynamic calculations, was reported. The role of minor additions of magnesium in the growth mechanism was emphasized. The resulting ultrafine near-spheroidal phases exhibited divorced growth characteristics.
The quaternary eutectic reaction in the Al5Ce3Si0.5Mg (wt pct) alloy, not anticipated based on existing phase diagrams and FactSage computational thermodynamic calculations, was revealed and its growth mechanism assessed, emphasizing the key role of minor additions of magnesium. The invariant transformation at 539 & DEG;C, L & RARR; alpha(Al) + Si + Al2MgSi/Al2Mg2Si + Al78.9Ce5.9Si12.7Mg2.6, generated an ultrafine morphology of near-spheroidal phases with 50-500 nm in diameter, located individually without the ordered arrangement, being characteristic for the non-coupled growth of divorced nature.
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