3D printing of zirconia via digital light processing: optimization of slurry and debinding process
3D printing of zirconia via digital light processing: optimization of slurry and debinding process
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DOI：
10.1016/j.jeurceramsoc.2020.05.079
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发表时间：
2020-12-01
影响因子：
5.7
通讯作者：
Bai, Jiaming
中科院分区：
文献类型：
--
作者：
Sun, Jinxing;Binner, Jon;Bai, Jiaming
数字光处理（DLP）被认为是加工陶瓷最有前途的3D打印技术之一，但浆料的精确组成和脱脂工艺的优化仍然是需要克服的挑战。在这项工作中，氧化锆浆料的分散和流变行为进行了研究，使用流变仪和紫外-可见光谱，并优化分散剂浓度被发现有显着的好处。采用基于DLP技术的氧化锆浆料制备了氧化锆绿色零件，在15 mJ cm（-2）的曝光能量下，获得了良好的尺寸分辨率。此外，脱脂过程进行了研究，使用TGA和优化的方法进行了设计和开发。染料渗透和SEM结果表明，在氩气而不是流动空气下脱脂，可以在0.2或0.5 ℃ min（-1）的加热速率下获得无裂纹部件，尽管前者总体上产生的结果略好。
Digital light processing (DLP) is regarded as one of the most promising 3D printing technologies to process ceramics, however the precise composition of the slurry and the optimisation of the debinding process are still challenges that need to be overcome. In this work, both the dispersion and rheological behaviour of the zirconia slurry were studied using rheometery and UV-vis spectroscopy, and optimising the dispersant concentration was found to have significant benefits. Zirconia green parts were fabricated with zirconia slurry based on DLP technology, which exhibited good dimensional resolution under an exposure energy dose of 15 mJ cm(-2). In addition, the debinding process was studied using TGA and an optimised approach was designed and developed. Dye penetration and SEM results showed that debinding under argon, rather than flowing air, could lead to crack-free parts at heating rates of either 0.2 or 0.5 degrees C min(-1), though the former yielded slightly better results overall.