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Submicrometre resolution measurement of the composition profile through E‐glass fibres subjected to stress‐corrosion
Author(s) -
Caddock B. D.,
Devenish R. W.,
Evans K. E.
Publication year - 1990
Publication title -
journal of microscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.569
H-Index - 111
eISSN - 1365-2818
pISSN - 0022-2720
DOI - 10.1111/j.1365-2818.1990.tb03045.x
Subject(s) - corrosion , aqueous solution , aluminium , materials science , core (optical fiber) , resolution (logic) , ultimate tensile strength , composite material , glass fiber , stress (linguistics) , analytical chemistry (journal) , chemistry , chromatography , linguistics , philosophy , artificial intelligence , computer science
SUMMARY A replication method has been developed to obtain high‐resolution composition profiles through E‐glass fibres subjected to corrosion by aqueous acids. STEM/EDX analysis of fragments of glass fibres has provided compositional information at a spatial resolution better than 0.1 μm. It has been shown that the core‐sheath profile observed in long‐time exposures of glass fibres to aqueous acids is indeed an extremely abrupt change, with calcium and aluminium ions fully leached from the sheath region. A surface region less than 0.2 μm thick of severe demineralization has also been detected in fibres undergoing a combination of aqueous acid corrosion and tensile load, which fail at short times and in which no core‐sheath morphology is detectable by SEM examination.