Long-Term Reliability Assessment of Bioceramics for Artificial Joints Using Microdamage Monitoring by AE

Abstract:

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Microfracture process during bending tests of alumina ceramics used for artificial joints was evaluated by acoustic emission (AE) technique. Four-point bending tests were carried out in air, refined water, physiological saline and simulated body fluid. AE behavior during bending test inhibited the rapid increasing point of AE events and energy prior to the final unstable fracture. It was understood that the bending stress at the increasing point corresponds to the critical stress for maincrack formation. The critical stress was affected by water in environments more strongly than fracture strength. Consequently, it was suggested that the characterization of maincrack formation is essential for the long-term reliability assessment of load-bearing bioceramics.

Info:

Periodical:

Key Engineering Materials (Volumes 309-311)

Main Theme:

Edited by:

Takashi Nakamura, Kimihiro Yamashita and Masashi Neo

Pages:

1191-1194

DOI:

10.4028/www.scientific.net/KEM.309-311.1191

Citation:

S. Wakayama et al., "Long-Term Reliability Assessment of Bioceramics for Artificial Joints Using Microdamage Monitoring by AE ", Key Engineering Materials, Vols. 309-311, pp. 1191-1194, 2006

Online since:

May 2006

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Price:

$35.00

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