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Influence of particle shape in the additive manufacturing process for ceramics

机译:颗粒形状在陶瓷添加剂制造过程中的影响

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Additive manufacturing (AM) of ceramics through a vat photopolymerization (VP) process is a promising technique due to the high intrinsic resolution and the evanescence of stresses introduced during the layerwise additive manufacturing process. Compared to the regular vat photopolymerization process, the addition of ceramic powder increases physical complexity. Hence, large scale adoption and optimization of AM for ceramics requires a thorough understanding of the underlying physics. This work focuses on the light scattering introduced through a complex interplay between optical properties of different constituents and its effect on the photopolymerization. The effect of the shape of the ceramic particle is investigated for isolated and multiple particle cases using a parametric analysis with regular convex polygons. Although the analysis of two-dimensional isolated particle shapes indicates a preference for one shape over the other, this difference vanishes in a multiple-scattering situation. A three-dimensional analysis furthermore shows that a two-dimensional approximation of the three-dimensional scattering problem is relevant and can be used to further the process understanding of ceramic VP. (C) 2018 Elsevier Ltd. All rights reserved.
机译:通过VAT光聚合(VP)过程的陶瓷的添加剂制造(AM)是由于在层状添加剂制造过程中引入的高质量分辨率和应力的发出引起的有希望的技术。与常规增值税光聚合过程相比,添加陶瓷粉末增加了物理复杂性。因此,对陶瓷的大规模采用和优化需要彻底了解潜在的物理学。这项工作侧重于通过不同成分的光学性质与其对光聚合的影响之间的复杂相互作用引入的光散射。使用具有规则凸多边形的参数分析研究了陶瓷颗粒形状的效果,用于分离和多颗粒例。尽管二维隔离粒子形状的分析表明,对于一种形状,但是在另一个形状上偏好,在多散射情况下这种差异消失。此外,三维分析表明,三维散射问题的二维近似是相关的,并且可以用于进一步对陶瓷VP的过程理解。 (c)2018年elestvier有限公司保留所有权利。

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