Interaction Mechanism between In Situ Nb2C-V2C Nanoparticles and S/L Interface during the Rapid Solidification of Fe-Nb-V Alloy

Chun Xiang Cui; Yan Chun Li; Tie Bao Wang; Shuang Jin Liu; Suek Bong Kang

doi:10.4028/www.scientific.net/AMR.415-417.285

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Interaction Mechanism between In Situ Nb₂C-V₂C Nanoparticles and S/L Interface during the Rapid Solidification of Fe-Nb-V Alloy

Abstract:

This paper deals with the interaction mechanism between in situ Nb₂C-V₂C nanoparticles and solid/liquid interface during the rapid solidification of Fe-Nb-V alloy ribbons. In situ Nb₂C-V₂C nanoparticles reinforced Fe alloy matrix composite were carried out by in situ reaction and melt spun with a high-speed centrifugal spray. According to the setting of a force balance for the in situ nanoparticles in front of the S/L interface during the high-speed centrifugal spray of Fe-Nb-V alloy melt as following: F = F_{buoyant force} + F_repulsive + F_{viscous force} + F_{centrifugal force}, authors get the critical velocity that S/L interface engulfs particles is proportional to the radius of particles. TEM observation indicates that the less the size of particle is, the more easily S/L interface engulfs particles.