Multiphase flow in directional solidification of metal matrix particulate composites

作者：Xiong Hong Bing; Ma Yuan; Zheng Li Li^*

来源：Modelling and Simulation in Materials Science and Engineering, 2006, 14(3): 445-463.

DOI：10.1088/0965-0393/14/3/008

• Bridgman solidification
• Metal matrix particulate composites (MMPC)
• Particle engulfment and pushing (PEP)

This paper aims at developing an efficient solidification model for metal matrix particulate composites (MMPCs). The molten metal is considered as a continuous multicomponent medium and described by species, momentum and energy equations. The immersed particles are treated as a discrete Lagrangian entity that exchanges momentum and energy with the liquid. The forces acting on particles in front of an advancing solidification interface are quantified for particle engulfment and pushing (PEP), and this model is incorporated into the computational scheme for simulating particle dynamic distributions. Al alloy growth with ZrO2 particles in Bridgman solidification is studied in this paper. The effects of convective melt motion and buoyancy forces on the particle dynamics are discussed, along with the improvement of the particle distribution through the control of liquid convection and the rate of solidification. ? 2006 IOP Publishing Ltd.

• 出版日期2006
• 单位浙江大学; Stony Brook University