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Typical XRD patterns of the as-cast, 5 mm cylindrical rods of the alloy added with 0–2000 appm oxygen.
SEM micrographs of the as-cast, 5 mm rod samples of the alloy added with 0 appm oxygen (a) 500 and (b) 2000 appm (c). Inset shows the blowup of the primary phase.
DTA curves of the melting (a) and solidification behavior (b) for the samples added with various oxygen contents.
Oxygen concentration of the as-cast alloys doped with different amounts of oxygen.
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