Effect of the preparation techniques of photopolymerizable ceramic slurry and printing parameters on the accuracy of 3D printed lattice structures
Effect of the preparation techniques of photopolymerizable ceramic slurry and printing parameters on the accuracy of 3D printed lattice structures
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DOI：
10.1016/j.jeurceramsoc.2021.08.052
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发表时间：
2021-10-04
影响因子：
5.7
通讯作者：
Essa, Khamis
中科院分区：
文献类型：
--
作者：
Kovacev, Nikolina;Li, Sheng;Essa, Khamis
数字光处理（DLP）技术展示了在各种工程应用中制造复杂结构零件的潜力。本研究的目的是评估Al2O3陶瓷浆料制备技术，建立最佳加工窗口，并评估直径达500 μ m的CAD支柱晶格结构的可制造性和尺寸精度。经预处理后的浆料具有良好的流变和光聚合性能。采用全因子实验设计（DOE），制定实验方案，评估打印参数对尺寸精度的影响。方差分析表明，曝光时间、曝光功率以及两者的交互作用对点阵支撑直径的尺寸精度有显著影响。发现多余固化宽度与特征尺寸、能量剂量和层厚有关。
Digital Light Processing (DLP) technology demonstrates the potential for manufacturing parts with complex structures for various engineering applications. The purpose of this study is to evaluate Al2O3 ceramic slurry preparation techniques, establish optimal processing window and assess the manufacturability and dimensional accuracy of lattice structures with CAD strut diameters of up to 500 mu m. Two preparation techniques of the ceramic slurry were investigated. The slurry with the pre-treated powder showed appropriate rheological and photopolymerization behaviour. Full factorial Design of Experiments (DOE) was conducted to generate an experimental plan and assess the influence of the printing parameters on the dimensional accuracy. Analysis of Variance (ANOVA) revealed the exposure time, the exposure power, and the interaction effect of both had a significant influence on the dimensional accuracy of lattice strut diameters. The excess cure width was found to be dependent on the feature size, the energy dose and the layer thickness.