Microstructural Evolution of Rapidly Solidified Co-Mo and Ni-Mo Eutectic Alloys

Abstract

Abstract: Droplets of Co-37.6 wt pct Mo and Ni-47.7 wt pct Mo eutectic alloys were rapidly solidified during containerless processing in a 3 m drop tube. A kind of anomalous eutectic appears in these two eutectic alloys when undercooling is beyond 56 and 61 K, respectively. The two eutectic phases in anomalous eutectic were observed to grow in dendrite manner. The formation of anomalous eutectic is ascribed to the cooperative dendrite growth of the two independently nucleated eutectic phases. Current dendrite and eutectic growth theories are applied to describe the observed processes.

Key words: Rapid solidification, Eutectic growth, Dendrite growth, Containerless processing

Xiujun HAN, Wenjing YAO, Bingbo WEI. Microstructural Evolution of Rapidly Solidified Co-Mo and Ni-Mo Eutectic Alloys[J]. J Mater Sci Technol, 2003, 19(06): 553-556.

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Microstructural Evolution of Rapidly Solidified Co-Mo and Ni-Mo Eutectic Alloys

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