Study of alumina ceramic parts fabricated via DLP stereolithography using powders with different sizes and morphologies |
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Authors: | Xiaohong Xu Shixiang Zhou Jianfeng Wu Shaoheng Liu Sitong Ma Tiantian Cheng |
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Affiliation: | State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, P. R. China |
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Abstract: | Selecting suitable ceramic powders for the preparation of UV-curable ceramic suspensions, which are well suited for printing processes and production of high-performance ceramic components, is a crucial factor in the practical industrial application of digital light processing (DLP) stereolithography. Therefore, this study aims to provide a comprehensive evaluation of alumina ceramic parts fabricated via DLP stereolithography using a variety of alumina powders with varying sizes and morphologies. Experiments were conducted to examine the rheological response, recoating performance, and curing behavior of UV-curable alumina suspensions. Additionally, the thermal decomposition behavior of three-dimensional (3D)-printed green-bodies, as well as the physical and mechanical properties of 3D-printed sintered alumina components were thoroughly investigated. The best physical and mechanical performances were achieved by printing 55 vol% suspensions prepared using near-spherical AA04 alumina powders (median diameter .4 μm). This study elucidates the effects of ceramic particle size and morphology on the entire technological process of DLP-based ceramic stereolithography, thereby establishing the guidelines for the fabrication of high-performance 3D-printed ceramic objects in industrial and engineering production by selecting appropriate ceramic powders. |
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Keywords: | Al2O3 powder DLP stereolithography mechanical property morphology rheological property size |
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