Method for measuring short crack R-curve behavior of ferroelectric ceramic

Wei Chen, Christopher S. Lynch, Doru Lupascu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

This work describes a method for measurement of R-curve behavior in ferroelectric ceramics using four point bending specimens with a controlled surface crack. A short surface crack is produced by a Knoop indentation and the damage zone is polished away. The results are compared for two compositions of lead lanthanum zirconate titanate (PLZT), an elastio-plastic ferroelectric composition and a linear elastic electrostrictive composition. R-curves are measured in the crack length regime of 0.1 to 0.8 mm. The ferroelastic composition displays a toughness increase from 0.7 to 1.4 MPa√m. The linear elastic composition displays a constant toughness of between 0.6 and 0.7 MPa√m. The R-curve behavior of PLZT 8/65/35 is attributed to ferroelastic toughening.

Original languageEnglish (US)
Title of host publicationAmerican Society of Mechanical Engineers, Aerospace Division (Publication) AD
PublisherASME
Pages119-124
Number of pages6
Volume59
ISBN (Print)0791816427
StatePublished - Dec 1 1999
EventAdaptive Structures and Material Systems - 1999 (The ASME International Mechanical Engineering Congress and Exposition) - Nashville, TN, USA
Duration: Nov 14 1999Nov 19 1999

Other

OtherAdaptive Structures and Material Systems - 1999 (The ASME International Mechanical Engineering Congress and Exposition)
CityNashville, TN, USA
Period11/14/9911/19/99

ASJC Scopus subject areas

  • Mechanical Engineering
  • Space and Planetary Science

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