研究了Si-Zr-B模壳涂层对准晶Al72Ni12Co16合金过冷度与凝固组织的影响规律.通过使用Si-Zr-B涂层模壳,在Al72Ni12Co16合金中获得了不同大小的过冷度,其最大值达到195 K.根据经典形核理论,计算了熔体与涂层内壁间的润湿角.研究结果表明: Si-Zr-B涂层对过冷准晶Al72Ni12Co16合金熔体具有较强的抑制形核作用,因而可使大体积合金熔体获得深过冷.
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