Material extrusion additive manufacturing of zirconia parts using powder injection molding feedstock compositions
Material extrusion additive manufacturing of zirconia parts using powder injection molding feedstock compositions
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DOI：
10.1016/j.addma.2022.102966
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发表时间：
2022-09-01
影响因子：
11
通讯作者：
Clemens, Frank
中科院分区：
文献类型：
--
作者：
Hadian, Amir;Fricke, Maximilian;Clemens, Frank
本研究的目的是评估用于氧化锆零件的材料挤出（MEX）增材制造的粉末注射成型（PIM）粘合剂组合物。选择四种商业PIM粘合剂组合物并与45体积%的氧化钇稳定的氧化锆粉末混合。由于所获得的陶瓷原料的脆性特性，使用基于螺杆的颗粒打印头来打印致密的氧化锆结构。为了比较3D打印性能，在本研究中还使用了市售的氧化锆细丝。由于加工过程中的相分离、差的印刷性能或溶剂脱脂过程中的分层，PIM粘合剂组合物的应用受到限制。仅一种基于PIM的原料组合物可以成功地印刷、脱粘和烧结。使用环上环装置来研究颗粒和长丝印刷盘在烧结后的等双轴弯曲强度。对于基准测试，冷等静压（CIP）陶瓷盘制造的商业，准备按，氧化锆粉末。环上环结果显示Weibull模量较低（3
The aim of this study is the evaluation of powder injection molding (PIM) binder compositions for the material extrusion (MEX) additive manufacturing of zirconia parts. Four commercial PIM binder compositions were selected and mixed with 45 vol% of yttria-stabilized zirconia powder. Due to the brittle characteristic of the obtained ceramic feedstocks, a screw based pellet printing head was used for printing dense zirconia structures. To compare 3D printing performance, additionally a commercially available zirconia filament was used in this study. Application of PIM binder compositions was limited either due to phase separation during processing, poor printing performance or delamination during solvent debinding. Only one of the PIM based feedstock compositions could be successfully printed, debound and sintered. A ring-on-ring setup was used to investigate the equibiaxial flexural strength after sintering for both pellet and filament printed disks. For benchmarking, cold isostatic pressed (CIP) ceramic discs were fabricated by commercial, ready-to-press, zirconia powder. The ring on-ring results showed a low Weibull modulus (3