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Research on the Fracture Phenomenon of Zirconia-Toughened Alumina Ceramics under Ultrasonic Vibration

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Abstract:

A study of the fracture phenomenon of zirconia-toughened alumina (ZTA) ceramics was carried. It analyzes the mechanisms of crack propagation of ZTA ceramics, and constructs fracture experiments of ZTA ceramics, so the propagation behavior on fracture in ZTA ceramics was investigated according to the experiment. By contrast, intercrystalline fracture happed in V-shaped groove of ceramic specimen under normal load without ultrasonic vibration during ceramic fracture, and transcrystalline fracture happed in V-shaped groove of ceramic specimen under normal load with ultrasonic vibration during ceramic fracture. Furthermore, the loading force of ceramic specimen under normal load with ultrasonic vibration is smaller than that under normal load without ultrasonic vibration all other conditions being equal. The results of fracture experiment prove that ultrasonic vibration assisted is good for the fracture of ceramic specimen, and it also proves that ultrasonic vibration assisted grinding may raise the working efficiency and improve surface integrity of ceramics from the standpoint of the fracture.

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Periodical:

Key Engineering Materials (Volume 455)

Pages:

156-160

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.455.156

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Online since:

December 2010

Authors:

Yan Yan Yan, Bo Zhao, Jun Li Liu

Keywords:

Ceramic, Fracture, Ultrasonic Vibration, Zirconia Toughened Alumina Ceramics

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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