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Strength of Lead Silicate Glass After H 2 Reduction
Author(s) -
Swiler Daniel R.,
VARSHNEYA ARUN K.,
Carville Patricia
Publication year - 1987
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.1151-2916.1987.tb04990.x
Subject(s) - lead glass , silicate glass , composite material , silicate , materials science , abrasion (mechanical) , surface layer , mineralogy , hydrogen , analytical chemistry (journal) , oxygen , stress (linguistics) , fracture (geology) , layer (electronics) , chemistry , organic chemistry , linguistics , philosophy , chromatography
Hydrogen‐reduced lead silicate glass canes showed nearly a 70% increase in four‐point bending strength over like specimens of the unreduced parent glass. No difference was observed in the strength of the reduced and the unreduced glasses after abrasion. Fractographs showed the presence of a surface layer (∼5 μm) in the reduced glass where the fracture traveled slowly. Secondary ion mass spectroscopic analysis showed this surface layer had decreased oxygen but increased Si + and SiOH + species. Although the possibility of surface compression could not be ruled out because of a possibly anomalous stress optical coefficient, it was concluded that the reduction altered the glass network to retard the subcritical crack velocity intrinsic to the system.