Share Email Print
cover

Proceedings Paper

Bubble formation in additive manufacturing of glass
Author(s): Junjie Luo; Luke J. Gilbert; Daniel C. Peters; Douglas A. Bristow; Robert G. Landers; Jonathan T. Goldstein; Augustine M. Urbas; Edward C. Kinzel
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Bubble formation is a common problem in glass manufacturing. The spatial density of bubbles in a piece of glass is a key limiting factor to the optical quality of the glass. Bubble formation is also a common problem in additive manufacturing, leading to anisotropic material properties. In glass Additive Manufacturing (AM) two separate types of bubbles have been observed: a foam layer caused by the reboil of the glass melt and a periodic pattern of bubbles which appears to be unique to glass additive manufacturing. This paper presents a series of studies to relate the periodicity of bubble formation to part scan speed, laser power, and filament feed rate. These experiments suggest that bubbles are formed by the reboil phenomena why periodic bubbles result from air being trapped between the glass filament and the substrate. Reboil can be detected using spectroscopy and avoided by minimizing the laser power while periodic bubbles can be avoided by a two-step laser melting process to first establish good contact between the filament and substrate before reflowing the track with higher laser power.

Paper Details

Date Published: 17 May 2016
PDF: 6 pages
Proc. SPIE 9822, Advanced Optics for Defense Applications: UV through LWIR, 98220D (17 May 2016); doi: 10.1117/12.2224321
Show Author Affiliations
Junjie Luo, Missouri Univ. of Science and Technology (United States)
Luke J. Gilbert, Missouri Univ. of Science and Technology (United States)
Daniel C. Peters, Missouri Univ. of Science and Technology (United States)
Douglas A. Bristow, Missouri Univ. of Science and Technology (United States)
Robert G. Landers, Missouri Univ. of Science and Technology (United States)
Jonathan T. Goldstein, Air Force Research Lab. (United States)
Augustine M. Urbas, Air Force Research Lab. (United States)
Edward C. Kinzel, Missouri Univ. of Science and Technology (United States)


Published in SPIE Proceedings Vol. 9822:
Advanced Optics for Defense Applications: UV through LWIR
Jay N. Vizgaitis; Bjørn F. Andresen; Peter L. Marasco; Jasbinder S. Sanghera; Miguel P. Snyder, Editor(s)

© SPIE. Terms of Use
Back to Top