Location

La Jolla, CA

Start Date

1-1-1989 12:00 AM

Description

Zirconia toughened ceramics, such as magnesia partially stabilized zirconia (Mg-PSZ), have received considerable attention due to their high strength and fracture toughness [1]. These properties are a consequence of stress-induced microstructural changes which inhibit crack propagation and provide a degree of ‘damage tolerance1 not common to other ceramic materials. Ultrasonic testing can aid in the characterization of microstructural changes associated with transformation plasticity [2]. The present paper presents measurements of ultrasonic velocity as a function of microstructural damage in Mg-PSZ loaded in compression at high strain rates. Observed changes in elastic moduli are compared to a model of a solid containing randomly distributed penny-shaped microcracks which are all oriented parallel to the axis of compression.

Volume

8B

Chapter

Chapter 9: Characterization of Materials

Section

Deformation and Fracture

Pages

1827-1832

DOI

10.1007/978-1-4613-0817-1_231

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Effect of Microstructural Damage on Ultrasonic Velocity and Elastic Moduli of Partially Stabilized Zirconia

La Jolla, CA

Zirconia toughened ceramics, such as magnesia partially stabilized zirconia (Mg-PSZ), have received considerable attention due to their high strength and fracture toughness [1]. These properties are a consequence of stress-induced microstructural changes which inhibit crack propagation and provide a degree of ‘damage tolerance1 not common to other ceramic materials. Ultrasonic testing can aid in the characterization of microstructural changes associated with transformation plasticity [2]. The present paper presents measurements of ultrasonic velocity as a function of microstructural damage in Mg-PSZ loaded in compression at high strain rates. Observed changes in elastic moduli are compared to a model of a solid containing randomly distributed penny-shaped microcracks which are all oriented parallel to the axis of compression.