Binder-free additive manufacturing of ceramics using hydrothermal-assisted jet fusion
Binder-free additive manufacturing of ceramics using hydrothermal-assisted jet fusion
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DOI：
10.1016/j.jeurceramsoc.2023.06.056
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发表时间：
2023-06
影响因子：
5.7
通讯作者：
F. Fei;L. Kirby;Alexander Gralczyk;Xuan Song
中科院分区：
文献类型：
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作者：
F. Fei;L. Kirby;Alexander Gralczyk;Xuan Song
陶瓷添加剂制造(AM)通常使用高比例的有机粘结剂来形成预烧成的绿色零件，这些零件需要经过后期脱粘工艺才能移除。脱粘过程不可避免地会导致严重的气体膨胀和残炭，导致最终零件中的结构缺陷、累积应力和材料性能受损。在这里，我们报道了一种名为水热辅助喷射熔化(HJF)的无粘结剂添加剂制造工艺，该工艺利用水热方法在温和的温度下制备出几何和成分复杂的陶瓷。HJF工艺使用选择性沉积的挥发性溶解油墨、高压和温和的热来策略性地将陶瓷粉床熔化成复杂的几何形状。与传统的AM陶瓷方法相比，HJF工艺消除了在绿色部件制造中对有机粘结剂的需求，并提供了将陶瓷与其他不同材料(如聚合物和金属)直接共打印的可能性，从而使新型多功能陶瓷复合材料的开发成为可能。
Ceramic additive manufacturing (AM) typically uses a high fraction of organic binders to form pre-sintered green parts that require a post de-binding process to remove. The de-binding process inevitably results in severe gas expansion and residual chars, leading to structural defects, accumulated stress, and compromised material properties in the final parts. Here we report a binder-free additive manufacturing process named hydrothermal-assisted jet fusion (HJF) that utilizes a hydrothermal method to create geometrically and compositionally complex ceramics under mild temperatures. The HJF process employs a selectively deposited volatile dissolving ink, high pressure, and mild heat to strategically fuse a ceramic powder bed into complex geometries. Compared to traditional AM methods for ceramics, the HJF process eliminates the need for organic binders in green part fabrication and offers the potential to directly co-print ceramics with other dissimilar materials, such as polymers and metals, enabling the development of novel multi-functional ceramic composites.