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Toughening of Glass by a Piezoelectric Secondary Phase
Author(s) -
Boccaccini Aldo R.,
Pearce David H.
Publication year - 2003
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.1151-2916.2003.tb03299.x
Subject(s) - materials science , toughening , piezoelectricity , lead zirconate titanate , composite material , fracture toughness , phase (matter) , toughness , toughened glass , stress (linguistics) , ferroelectricity , dielectric , optoelectronics , linguistics , chemistry , philosophy , organic chemistry
A toughening concept for glass, based on exploiting the ferroelastic effect of piezoelectric particles embedded in a glass matrix, is described. It is hypothesized that the domains within a piezoelectric phase will align themselves in the direction of the stress field around an advancing crack, thus absorbing energy and contributing to toughening. A powder technology route was optimized to fabricate lead‐containing glass‐matrix composites with up to 30 wt% of a lead zirconate titanate (PZT) particulate phase. An increase in fracture toughness of >50% was achieved via the addition of 30 wt% of PZT particles. Although other toughening mechanisms could be excluded in the present composites, the actual contribution of piezoelectric toughening remains under investigation.