Application of tomographic reconstruction techniques for density analysis of green bodies

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• 作者：M. Scot Swan ^{matthewscot.swan@unitn.it" class="auth_mail" title="E-mail the corresponding author} ; Andrea Piccolroaz ^{andrea.piccolroaz@unitn.it" class="auth_mail" title="E-mail the corresponding author} ; Davide Bigoni ; ^{bigoni@ing.unitn.it" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Tomography ; Density evaluation techniques ; Mechanical densification ; Green bodies
• 刊名：Ceramics International
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：43
• 期：1
• 页码：749-754
• 全文大小：931 K

文摘

Progress in the manufacturing of ceramics, but also of sintered metals, strongly relies on the evaluation of the density distribution in green bodies. This evaluation is crucial from many points of view, including the calibration of constitutive models for in-silico simulation of densification processes. To this end, X-ray tomography and other techniques are possible but can be unmanageable for some institutions. Therefore, a destructive method is introduced in the present article to measure the density field of a green body sample using a CNC mill, an analytical balance, and analysis techniques from the field of computational tomography. A virtual experiment is presented where the method is used to reconstruct a simulated green body density field and is found to satisfactorily correspond to the original solution. The green body density field of a truncated cylinder made of alumina powder is evaluated using this method and the reconstructed field is presented.