Mechanical and Phase Stability of Zirconia Toughened Alumina

Abstract:

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The JMM-ZTA, a kind of zirconia-toughened alumina, is a bearing ceramic newly developed for artificial joints. Although it has already been reported that mechanical strength and fracture toughness are higher in the JMM-ZTA than in alumina, the stability of the JMM-ZTA has not been studied in detail yet. In the present study, the stability of the JMM-ZTA with respect to mechanical strength and crystalline phases was examined under hydrothermal environment, and the results were compared with those of alumina. Both the 4-point bending strength and the fraction of monoclinic zirconia unchanged even after the aging test at 121°C for 300 h. These results indicate that the JMM-ZTA possesses quite excellent stability to be used as bearing material of artificial joints.

Info:

Periodical:

Key Engineering Materials (Volumes 330-332)

Main Theme:

Edited by:

Xingdong Zhang, Xudong Li, Hongsong Fan, Xuanyong Liu

Pages:

1267-1270

DOI:

10.4028/www.scientific.net/KEM.330-332.1267

Citation:

T. Nakanishi et al., "Mechanical and Phase Stability of Zirconia Toughened Alumina", Key Engineering Materials, Vols. 330-332, pp. 1267-1270, 2007

Online since:

February 2007

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Price:

$35.00

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