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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 >SINTERING OF CERAMIC COMPONENTS WITH POROSITY AND COMPOSITION GRADIENTS
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SINTERING OF CERAMIC COMPONENTS WITH POROSITY AND COMPOSITION GRADIENTS

机译：陶瓷组分与孔隙度和组成梯度的烧结

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摘要

Sintering of macroscopically inhomogeneous ceramic components is always accompanied by shape distortion due to the difference in shrinkage rates of powder elements. The objective of the present investigation is the theoretical determination of initially distorted shapes of the green bodies needed to provide near-net-shape sintered components. Calculations are based on a finite element implementation of the continuum theory of sintering. In this theory, sintering is considered as a creep under the influence of the special compressive "sintering stress". To predict the initial shapes of the components, the "reverse" numerical procedure is used, when the component is assumed to swell from the final shape to the initial one under the influence of the pressure equal (with the exception of sign) to the sintering stress.
机译：由于粉末元素收缩率的差异，宏观上不均匀的陶瓷部件的烧结总是伴随着形状变形。本研究的目的是从理论上确定提供接近最终形状的烧结部件所需的生坯的初始变形形状。计算基于烧结连续理论的有限元实现。在该理论中，烧结被认为是在特殊压缩“烧结应力”的影响下的蠕变。为了预测组件的初始形状，当假定组件在与烧结相等的压力（符号除外）的影响下从最终形状膨胀到初始形状时，使用“反向”数值过程。强调。

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