The Interaction of the Convective Flow with the Interface Evolution of the Particle Growing in the Undercooled Melt

• DOI: 10.4028/www.scientific.net/amr.622-623.747
• Publication Date: 2012-12-27T08:28:24Z
• Authors: Ming Wen Chen; Long Fei Zuo; Han Jiang; Guo Biao Lin; Hong Zhang; Zi Dong Wang
• Keywords: 0103 physical sciences; 01 natural sciences

This paper investigates the interaction between the convective flow induced by the straining flow and the interface morphology of a particle growing in the convective undercooled melt. The resulting approximate solution of the particle shape shows that the convection makes the growing particle enhance its growth velocity and protrude near the surface where the flow is incoming, but decreases its growth near the surface where the flow is outgoing, and both the incoming flow and the anisotropic surface tension make the velocity of the particle have a superposition effect along the favorite crystalline direction. The convection makes the particles growing in the undercooled melt evolve into various shapes of the interface morphology which have high strength/weight ratio and specific surface fraction and then help to form the final material of excellent mechanical and physical properties.