人工関節用バイオセラミックスの擬似生体環境における微視破壊過程のAE法による評価(OS.2 バイオエンジニアリング)

概要

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Microfracture process in bioceramics for artificial joints was evaluated using acoustic emission technique. Four point bending tests of alumina and zirconia ceramics were carried out in air, refined water, physiological saline and simulated body fluid to investigate the effect of environment on microfracture process. Rapid AE increasing point was observed on AE behavior before the final unstable fracture. It was understood that the stress at the point corresponds to the maincrack formation in the previous work. AE behavior was compared between Al_2O_3 and ZrO_2. Consequently, it was understood that the residual life time after maincrack formation in ZrO_2 is larger than Al_2O_3 due to transformation toughening.
一般社団法人日本機械学会の論文
2004-03-03