21112 AE法による人工関節用セラミックスの破壊過程における微視割れの定量評価(バイオエンジニアリング(3),OS3 バイオエンジニアリング)

概要

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Quantitative microcrack characterization was carried out. Fracture toughness test of bioceramics using alumina compact tension specimen was carried out. During the test acoustic emission signal emitted by microcrack nucleation were recorded by piezoelectric transducers. The response function of the specimen was determined using a pencil lead breaking as a simulated source. Then acoustic emission source function emitted by microcrack nucleation was also determined by inverse calculation using obtained response function. From acoustic emission source function, size and nucleation velocity of microcrack were understood. Consequently, it was understood that microcracks with 5〜10μm of diameter and 15〜50m/s of nucleation velocity were nucleated in this test.
2006-03-09