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.

Meeting Name

ASME 2019 14th International Manufacturing Science and Engineering Conference, MSEC 2019 (2019: Jun. 10-14, Erie, PA)


Mechanical and Aerospace Engineering


This work was funded by Honeywell Federal Manufacturing & Technologies under Contract No. DE-NA0002839 with the U.S. Department of Energy.

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)


Document Type

Article - Conference proceedings

Document Version


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© 2019 American Society of Mechanical Engineers (ASME), All rights reserved.

Publication Date

01 Jun 2019