About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
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Symposium
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Special Session
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Presentation Title |
Preparation and Characterization of Laser Direct Deposited Spinel Filaments for Wire-fed Additive Manufacturing of Transparent Ceramics |
Author(s) |
John Pappas, Xiangyang Dong |
On-Site Speaker (Planned) |
Xiangyang Dong |
Abstract Scope |
A new approach for direct fabrication of spinel filaments is proposed for wire-fed additive manufacturing (AM) of transparent ceramics in this study. Cylindrical magnesium aluminate spinel filaments were prepared by a laser direct deposition process. With a laser melt-grown process, the need for powder binders and post-processing procedures was eliminated. The morphology, microstructure, and phase composition of the obtained spinel filaments were characterized in terms of processing conditions and powder composition. The cross-sections of the as-fabricated filaments were also analyzed to characterize porosity, grain size, and cracking obtained from the proposed method. The insights gained allowed for production of high-purity ceramic filaments with an easy control of residual porosity as further tailored for wire-fed AM of ceramics. This is particularly important for AM of transparent ceramics, where even a small amount of residual pores greatly hindered optical properties and yielded parts with a transition from transparency to opaqueness. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |