R-Curve for a Lead Zirconate Titanate Ceramic Obtained from Tensile Strength Tests with Knoop-Damaged Specimens |
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| Authors: | Theo Fett Dietrich Munz |
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| Affiliation: | Forschungszentrum Karlsruhe, Institut für Materialforschung II, D-76021 Karlsruhe, Germany |
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| Abstract: | A procedure was used that made it possible to determine the R -curve for piezoelectric ceramics from tensile strength tests conducted with Knoop-damaged specimens. The resulting crack-tip toughness K I0 was 0.6 MPa·m1/2, and the R -curve starting from this value increased to 1.4 MPa·m1/2 within a 0.7 mm crack extension. |
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| Keywords: | R-curve lead zirconate titanate piezoelectric materials/properties |
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