具有剪切诱导取向的短纤维增强3D打印陶瓷复合材料。
Short fiber reinforced 3d printed ceramic composite with shear induced alignment.
作者信息
Yunus Doruk Erdem, He Ran, Shi Wentao, Kaya Orhan, Liu Yaling
机构信息
Department of Mechanical Engineering & Mechanics, Lehigh University, Bethlehem, PA 18015, USA.
BioEngineering Program, Lehigh University, Bethlehem, PA 18015, USA.
出版信息
Ceram Int. 2017 Oct 15;43(15):11766-11772. doi: 10.1016/j.ceramint.2017.06.012.
This paper accounts for utilization of shear induced alignment method during ceramic stereolithography. Lateral oscillation mechanism, combined with 3d printed wall pattern, was employed to generate necessary shear to align fiber in desired direction. First, semicircular channel pattern was printed to assess the effect of difference between wall direction and oscillation direction on the fiber alignment. Then, flexural strength of ceramic matrix was tested with nickel coated carbon fiber and ceramic fiber reinforcements. The results demonstrated that the shear induced alignment further improves the flexural strength compare to randomly distributed samples. Flexural strength of aligned samples with 1.0 wt% carbon fiber loading was improved by ~90% compared to randomly orientated samples and by ~333% compared to unreinforced samples. Finally, fracture surface morphology of the flexural strength test specimens was evaluated. The main fracture mechanism was observed as fiber pull-out.
本文阐述了在陶瓷立体光刻过程中剪切诱导取向方法的应用。采用横向振荡机制并结合3D打印壁图案，以产生必要的剪切力，使纤维沿所需方向排列。首先，打印半圆形通道图案，以评估壁方向与振荡方向之间的差异对纤维排列的影响。然后，用镀镍碳纤维和陶瓷纤维增强材料测试陶瓷基体的抗弯强度。结果表明，与随机分布的样品相比，剪切诱导取向进一步提高了抗弯强度。与随机取向的样品相比，含1.0 wt%碳纤维负载的取向样品的抗弯强度提高了约90%，与未增强的样品相比提高了约333%。最后，对抗弯强度测试样品的断口表面形态进行了评估。观察到主要断裂机制为纤维拔出。
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