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The Trident Seal—A Rapid and Accurate Expansion Differential Test
Author(s) -
HAGY H. E.
Publication year - 1979
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1979.tb18806.x
Subject(s) - seal (emblem) , materials science , composite material , residual stress , reproducibility , thermal expansion , glass ceramic , ceramic , mathematics , art , statistics , visual arts
A simple glass‐to‐glass seal is used to measure expansion differential by residual stress measurement using optical bench techniques. Since only uniaxial stresses are produced, Poisson strain corrections are not required, thus overcoming a shortcoming in conventional seals. Sensitivity and reproducibility are greater than with direct dilatometry. Glass‐to‐ceramic and glass‐to‐metal differentials can also be measured.