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首页> 外文会议>2002 International Conference on Process Modeling in Powder Metallurgy amp; Particulate Materials Oct 28-29, 2002 Newport Beach, California >FINITE ELEMENT SIMULATION OF THERMAL AND ELECTRICAL FIELDS IN FIELD ACTIVATION SINTERING
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FINITE ELEMENT SIMULATION OF THERMAL AND ELECTRICAL FIELDS IN FIELD ACTIVATION SINTERING

机译：场活化烧结中热和电场的有限元模拟

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摘要

Sintering aided by pulsed electrical current offers the advantage of accelerated densification for a variety of powders. In this work, we employ numerical simulations in order to understand the distributions of current and temperature within the punch/die/specimen assembly. A thermal-electrical model with temperature and density dependent thermal and electrical properties is implemented in finite element software. An equivalent lumped resistance network model is proposed. The role of resistivity and height of specimen is discussed. In addition, the issue of contact resistances between punches and die is also addressed. Application of this model for field activated sintering of alumina is presented here.
机译：脉冲电流辅助的烧结为多种粉末提供了加速致密化的优势。在这项工作中，我们采用数值模拟来了解冲头/模具/试样组件中电流和温度的分布。在有限元软件中实现了具有温度和密度相关的热和电特性的热电模型。提出了等效的集总电阻网络模型。讨论了电阻率和试样高度的作用。另外，还解决了冲头和模具之间的接触电阻的问题。本文介绍了该模型在氧化铝现场活化烧结中的应用。

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