AN ANALYTICAL MODEL FOR THE INTERACTION BETWEEN AN INSOLUBLE PARTICLE AND AN ADVANCING SOLID LIQUID INTERFACE
AN ANALYTICAL MODEL FOR THE INTERACTION BETWEEN AN INSOLUBLE PARTICLE AND AN ADVANCING SOLID LIQUID INTERFACE
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DOI：
10.1007/bf02801184
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发表时间：
1992-02-01
期刊：
影响因子：
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通讯作者：
STEFANESCU, DM
中科院分区：
文献类型：
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作者：
SHANGGUAN, D;AHUJA, S;STEFANESCU, DM
本文分析了颗粒在前进固液界面前的行为。 在所提出的分析模型中，计算了颗粒从推动到被界面吞没的临界速度作为相关材料参数和工艺变量的函数。 特别是，颗粒和基质的热性能的差异对颗粒/界面相互作用的影响进行了检查。 结果表明，颗粒的存在会使界面不稳定，从而影响颗粒在界面处的行为。 在此基础上，构建了粒子行为图，描述了不同材料体系中粒子在不同生长条件下的复杂行为。 理论预测进行了比较，在透明的有机材料，以及在金属系统中获得的实验结果。 这些意见的相关性，颗粒增强金属基复合材料（MMCs）的熔融加工进行了讨论。
In this article, the behavior of particles in front of an advancing solid/liquid interface was analyzed. In the analytical model presented, the critical velocity for the transition from particle pushing to engulfment by the interface was calculated as a function of relevant material parameters and processing variables. In particular, the effect of the difference in the thermal properties of the particle and the matrix on the particle/interface interaction was examined. It was demonstrated that the presence of particles could destabilize the interface which, in turn, affected the behavior of particles at the interface. Based on the analysis, a particle behavior map was constructed to illustrate the complex particle behaviors in different material systems under various growth conditions. Theoretical predictions were compared against experimental results obtained in transparent organic materials as well as in metallic systems. The relevance of these observations to the melt processing of particulate-reinforced metal matrix composites (MMCs) was discussed.