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19 April 2017 Additive manufacturing of borosilicate glass (Conference Presentation)
Junjie Luo, Jonathan T. Goldstein, Augustine M. Urbas, Douglas A. Bristow, Robert G. Landers, Edward C. Kinzel
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Proceedings Volume 10095, Laser 3D Manufacturing IV; 100950A (2017) https://doi.org/10.1117/12.2256667
Event: SPIE LASE, 2017, San Francisco, California, United States
Abstract
Glasses including have significant scientific and engineering applications including optics, communications, electronics, and hermetic seals. This paper investigates a filament fed process for Additive Manufacturing (AM) of borosilicate glasses. Compared to soda-lime glasses, borosilicate glasses have improved coefficient of thermal expansion (CTE) and are widely used because of thermal shock resistance. In this work, borosilicate glass filaments are fed into a CO2 laser generated melt pool, smoothly depositing material onto the workpiece. Single tracks are printed to explore the effects that different process parameters have on the morphology of printed glass as well as the residual stress trapped in the glass. The transparency of glass allows residual stress to be measured using a polariscope. The effect of the substrate as well and substrate temperature are analyzed. We show that if fracture due to thermal shock can be avoided during deposition, then the residual stress can be relieved with an annealing step, removing birefringence. When combined with progress toward avoiding bubble entrapment in printed glass, we show the AM approach has the potential to produce high quality optically transparent glass for optical applications.
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Junjie Luo, Jonathan T. Goldstein, Augustine M. Urbas, Douglas A. Bristow, Robert G. Landers, and Edward C. Kinzel "Additive manufacturing of borosilicate glass (Conference Presentation)", Proc. SPIE 10095, Laser 3D Manufacturing IV, 100950A (19 April 2017); https://doi.org/10.1117/12.2256667
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KEYWORDS
Glasses
Borosilicate glass
Additive manufacturing
Optics manufacturing
Carbon dioxide lasers
Communication engineering
Electronics
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