发表机构
University of Victoria（维多利亚大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究通过有限元模拟探索微波体积增材制造，提出三种设备设计，实现选择性加热粉末材料，为陶瓷、金属等非光聚合材料开辟VAM新途径。
AI 中文摘要
体积增材制造（VAM）是先进制造领域的一个有前景的方向，它缩短了传统3D打印的生产时间，同时保持了对复杂几何形状的适用性。当前的VAM系统仅限于光聚合树脂，这降低了其在工业中的普遍适用性。本工作提出了基于微波的VAM系统的探索性有限元模拟，该系统兼容陶瓷、金属或复合粉末 feedstock。模拟探索了三种设备——线性谐振器、交叉干涉仪和边界加热器——每种设备在一种或多种所考虑的 feedstock 材料的制造过程中都有潜在用途。我们发现，通过精确控制输入频率、功率和波导横模，可以设计热晶格以选择性加热 feedstock 区域，从而直接应用于VAM。由此产生的晶格具有约1毫米的细胞尺寸，并需要约100千瓦的输入功率。随着微波技术的进步实现这种精度，此类设备可以为目前光学方法范围之外的材料开辟VAM的途径。
英文摘要
Volumetric additive manufacturing (VAM) is a promising field of advanced manufacturing which reduces production times of conventional 3D printing while retaining application to complex geometries. Current VAM systems are limited to photo-polymerizing resins, which reduces the general applicability across industry. This work presents exploratory finite element simulations of microwave-based VAM systems compatible with ceramic, metal, or composite powder feedstock. The simulations explore three devices -- a linear resonator, a cross interferometer, and a boundary heater -- each with potential uses in manufacturing processes for one or multiple of the considered feedstock materials. We find that with precise control of input frequency, power, and waveguide transverse modes, thermal lattices can be engineered to selectively heat regions of the feedstock, allowing direct application to VAM. Resultant lattices have cellular dimensions on the order of 1 mm, and require input powers on the order of 100 kW. With advances in microwave technologies allowing for this precision, such devices could open pathways to VAM with materials currently outside the scope of optical methods.
Comments34 pages, 7 figures
