Ceramic binder jetting additive manufacturing: Effects of particle size on feedstock powder and final part properties
Ceramic binder jetting additive manufacturing: Effects of particle size on feedstock powder and final part properties
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DOI：
10.1016/j.ceramint.2020.03.280
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发表时间：
2020-07-01
影响因子：
5.2
通讯作者：
Ma, Chao
中科院分区：
文献类型：
--
作者：
Moghadasi, Mohammadamin;Du, Wenchao;Ma, Chao
粘合剂喷射是一种很有前途的增材制造工艺，可用于制造包括陶瓷在内的各种材料。本研究的目的是研究粉末粒度对原料粉末的流动性和烧结性的影响，以及由此产生的零件性能。将商业陶瓷复合粉末筛分成三种不同的粒度范围：分别指定为细、中和粗粉末。对筛分的粉末进行流动性和烧结性测量。在印刷和烧结后，用阿基米德法测量样品的密度。压缩试验进行调查的机械性能的制造部件。实验结果表明，随着粉体粒度的增大，粉体的流动性增大，但烧结性下降。印刷和烧结密度取决于流动性和烧结性：由于流动性和烧结性之间的平衡，介质粉末实现了最高密度。抗压强度主要由烧结性决定：由于烧结性最高，因此细粉的强度最高。
Binder jetting is a promising additive manufacturing process to fabricate a wide range of materials, including ceramics. The objective of this research is to investigate the effects of particle size on flowability and sinterability of the feedstock powder and resultant properties of fabricated parts. A commercial ceramic composite powder was sieved into three different particle size ranges: designated as fine, medium, and coarse powders, respectively. Flowability and sinterability measurements were performed on the sieved powders. After printing and sintering, the density of samples was measured with the Archimedes' method. Compressive tests were performed to investigate the mechanical properties of the fabricated parts. The experimental results showed that flowability increased but sinterability decreased as particle size increased. The printed and sintered density was dependent on both flowability and sinterability: the highest density was achieved by the medium powder due to the balance between flowability and sinterability. The compressive strength was dominated by sinterability: the highest strength was achieved by the fine powder because of the highest sinterability.