Fabrication of Glass to Metal Connections using a Laser Heated Additive Approach
Glass-to-metal seals are important in hermetic electrical feedthroughs for high-temperature and high-pressure applications. Traditionally, glass-to-metal seals are created using a high temperature furnace with controlled pressure and atmosphere. Current manufacturing techniques for glass-tometal seals require precise fixturing (limiting unitization) and face restrictions in terms of the coefficient of thermal expansion for the glass/metal system. This paper explores the potential to use a laser to locally heat the glass as the first step toward the additive manufacturing of glass to metal seals. Studies are conducted fusing both frit and preforms under ambient conditions. The effects of process parameters on the process are quantified. The paper shows the potential of the process using Selective Laser Melting equipment, which can lead to greater flexibility for glass-to-metal seals with respect to geometry, materials, and spatially varying properties.
B. Curtis et al., "Fabrication of Glass to Metal Connections using a Laser Heated Additive Approach," Proceedings of the ASME 2019 14th International Manufacturing Science and Engineering Conference (2019, Erie, PA), vol. 2, American Society of Mechanical Engineers (ASME), Jun 2019.
The definitive version is available at https://doi.org/10.1115/MSEC2019-3048
ASME 2019 14th International Manufacturing Science and Engineering Conference, MSEC 2019 (2019: Jun. 10-14, Erie, PA)
Mechanical and Aerospace Engineering
Keywords and Phrases
Additives; Glass; Hermetic seals; High temperature applications; Metals; Selective laser melting; Thermal expansion, Ambient conditions; Fixturing; High temperature and high pressure; High temperature furnaces; Manufacturing techniques; Process parameters, Laser materials processing
International Standard Book Number (ISBN)
Article - Conference proceedings
© 2019 American Society of Mechanical Engineers (ASME), All rights reserved.
01 Jun 2019