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填充方向对熔融长丝制造法生产的氧化锆部件性能的影响

Influence of the Infill Orientation on the Properties of Zirconia Parts Produced by Fused Filament Fabrication.

作者信息

Cano Santiago, Lube Tanja, Huber Philipp, Gallego Alberto, Naranjo Juan Alfonso, Berges Cristina, Schuschnigg Stephan, Herranz Gemma, Kukla Christian, Holzer Clemens, Gonzalez-Gutierrez Joamin

机构信息

Department of Polymer Engineering and Science, Institute of Polymer Processing, Montanuniversitaet Leoben, Otto Gloeckel-Straße 2, 8700 Leoben, Austria.

Department of Materials Science, Chair of Structural and Functional Ceramics, Montanuniversitaet Leoben, Franz Josef-Straße 18, 8700 Leoben, Austria.

出版信息

Materials (Basel). 2020 Jul 15;13(14):3158. doi: 10.3390/ma13143158.

DOI:10.3390/ma13143158
PMID:32679838
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7411807/
Abstract

The fused filament fabrication (FFF) of ceramics enables the additive manufacturing of components with complex geometries for many applications like tooling or prototyping. Nevertheless, due to the many factors involved in the process, it is difficult to separate the effect of the different parameters on the final properties of the FFF parts, which hinders the expansion of the technology. In this paper, the effect of the fill pattern used during FFF on the defects and the mechanical properties of zirconia components is evaluated. The zirconia-filled filaments were produced from scratch, characterized by different methods and used in the FFF of bending bars with infill orientations of 0°, ±45° and 90° with respect to the longest dimension of the specimens. Three-point bending tests were conducted on the specimens with the side in contact with the build platform under tensile loads. Next, the defects were identified with cuts in different sections. During the shaping by FFF, pores appeared inside the extruded roads due to binder degradation and or moisture evaporation. The changes in the fill pattern resulted in different types of porosity and defects in the first layer, with the latter leading to earlier fracture of the components. Due to these variations, the specimens with the 0° infill orientation had the lowest porosity and the highest bending strength, followed by the specimens with ±45° infill orientation and finally by those with 90° infill orientation.

摘要

陶瓷的熔融长丝制造（FFF）能够通过增材制造生产具有复杂几何形状的部件，可用于许多应用，如模具制造或原型制作。然而，由于该工艺涉及众多因素，很难区分不同参数对FFF部件最终性能的影响，这阻碍了该技术的推广。本文评估了FFF过程中使用的填充图案对氧化锆部件的缺陷和力学性能的影响。氧化锆填充长丝是从零开始制备的，通过不同方法进行表征，并用于制造弯曲棒的FFF过程中，这些弯曲棒的填充方向相对于试样的最长尺寸为0°、±45°和90°。在拉伸载荷下，对与构建平台接触的一侧的试样进行三点弯曲试验。接下来，通过在不同截面进行切割来识别缺陷。在通过FFF成型过程中，由于粘结剂降解和/或水分蒸发，挤出路径内部出现了孔隙。填充图案的变化导致第一层出现不同类型的孔隙率和缺陷，后者导致部件更早断裂。由于这些变化，填充方向为0°的试样孔隙率最低，弯曲强度最高，其次是填充方向为±45°的试样，最后是填充方向为90°的试样。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e734/7411807/ed335f48bbec/materials-13-03158-g011.jpg
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