Ceramic On‐Demand Extrusion (CODE) process has been recently proposed for additive manufacturing of strong ceramic components via extrusion. This paper focuses on fabricating 3 mol% yttria‐stabilized zirconia (3YSZ) components using CODE process, and enabling CODE to produce parts with support structures. A colloidal suspension of 3YSZ was developed and deposited through the main nozzle, and an organic feedstock was developed and deposited by means of another nozzle to fabricate supports. After printing and drying of raw parts, supports were removed by increasing the temperature and parts were then sintered to near theoretical (~99%) density. The maximum overhang angle that could be built with no support was also found out to be approximately 60 degrees. Three organic support materials, that is, polycaprolactone (PCL), silicone, and petrolatum were prepared and tested. PCL and petrolatum were identified as feasible support materials. Specimens were fabricated to validate the efficiency of the support materials and to evaluate CODE's capability for building parts with complex geometry. The microstructures of these parts were also analyzed via scanning electron microscopy.

中文翻译：

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具有有机牺牲载体的氧化锆零件的增材制造

最近提出了陶瓷按需挤出（CODE）工艺，用于通过挤出来增材制造坚固的陶瓷组件。本文着重于使用CODE工艺制造3摩尔％的氧化钇稳定的氧化锆（3YSZ）组件，并使CODE能够生产具有支撑结构的零件。通过主喷嘴显影并沉积3YSZ的胶体悬浮液，并通过另一个喷嘴显影并沉积有机原料以制造载体。在对原始零件进行印刷和干燥后，通过升高温度除去支撑物，然后将零件烧结至接近理论密度（约99％）。还发现在没有支撑的情况下可以建立的最大悬垂角约为60度。三种有机载体材料，即聚己内酯（PCL），有机硅，和凡士林准备和测试。PCL和凡士林被确定为可行的支持材料。制作了样品以验证支撑材料的效率并评估CODE建造复杂几何形状零件的能力。还通过扫描电子显微镜分析了这些部件的微观结构。