Sealing 304L to lithia-alumina-silica (LAS) glass-ceramics | Zendy

W. E. Moddeman | Zendy; R. E. Pence | Zendy; Roger Massey | Zendy; R. T. Cassidy | Zendy; Daniel P. Kramer | Zendy

AI Assistant Blog Pricing

Home ZAIA Blog

Open Access

Sealing 304L to lithia-alumina-silica (LAS) glass-ceramics

Author(s) -

W. E. Moddeman,

R. E. Pence,

Roger Massey,

R. T. Cassidy,

Daniel P. Kramer

Publication year - 1989

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/274153

Subject(s) - materials science , ceramic , thermal expansion , inconel , metallurgy , crystallization , alloy , glass ceramic , composite material , metallography , microstructure , chemistry , organic chemistry

The formation of a crack-free between 300 series stainless steel and a glass-ceramic is difficult owing to the high coefficients of thermal expansion of the stainless steels. Lithia-alumina-silica (LAS) glass-ceramics were successfully developed and sealed to 304L stainless steel. These crack-free seals were fabricated by two techniques: by adjusting the parent glass composition (reducing the Al{sub 2}O{sub 3} content), or by adjusting the sealing/crystallization cycle. All seals were hermetic, with leak rates < 10{sup -8} cc/sec STP helium. CTE and alloy yield strengths are given which show the feasibility of using these materials to make feedthroughs, pyrotechnic components, etc. Metallography, SEM, and wavelength dispersive spectroscopy show the quality and integrity of the glass-ceramic/stainless steel interface. These data are compared to those on the Inconel 718/LAS-glass seal system

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research