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There are many Zr particles in as-cast NiAl-33.5Cr-0.5Zr (at. pct) alloy, which usually exist at the edge of eutectic ofβ-NiAl and α-Cr. After air and furnace cooling solution treatments,for 1400℃, 2 h and 1450℃, 1 h, pure Zr phase remains in the furnace