Numerical Simulation of a Centrifugal Process to Fabricate Permittivity Graded FGM from Alumina/Epoxy Mixture
Numerical Simulation of a Centrifugal Process to Fabricate Permittivity Graded FGM from Alumina/Epoxy Mixture
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DOI：
10.4028/www.scientific.net/msf.492-493.459
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发表时间：
2005-04
期刊：
影响因子：
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通讯作者：
S. Tsuru;N. Hayashi;T. Onoda;Yasushi Sakamoto;M. Hara
中科院分区：
文献类型：
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作者：
S. Tsuru;N. Hayashi;T. Onoda;Yasushi Sakamoto;M. Hara
提出了一种新的数值模拟固体颗粒/粘性基体混合物离心制备功能梯度材料（FGM）过程的方法，并将该方法成功地应用于氧化铝/环氧树脂混合物离心制备FGM的实际过程。利用所提出的方法估算了梯度功能梯度材料的介电常数梯度分布，并与实验结果进行了比较，两者吻合较好。根据数值计算结果，确定了分散填料的数密度和粒径的梯度分布，并论证了填料粒径对填料填充率梯度的贡献。它的结论是，在填料分布的梯度，可以有意识地通过改变不仅离心条件，但也填料的粒度分布进行调节。
A new numerical method to simulate the centrifugal process of fabricating functionally graded materials (FGMs) from solid-particles/viscous-matrix mixtures is proposed, and the simulation method was successfully applied to a practical fabrication process of FGM from an alumina-fillers/epoxy-resin mixture. Gradient profiles of dielectric constant of the resultant FGM were estimated by using the proposed method and compared with the experimental ones, resulting in reasonable agreement between them. Based on the numerical results, gradient pro- files of the number density and size of the dispersed fillers were confirmed, and contribution of the filler size toward the gradient in the packing fraction was demonstrated. It is concluded that the gradient in the filler distribution can be intentionally regulated by changing not only the centrifugal conditions, but also the size distribution of the fillers.