1366 人工関節用アルミナセラミックスの微視的構造と摩耗挙動

概要

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Wear behavior of alumina ceramics for ceramic-on-ceramic joint prostheses was evaluated in the unidirectional sliding wear test by using a pin-on-disk test apparatus, and an effect of its microstructure on the wear behavior was examined. Hot isostatic pressing (HIP) and centrifugal compaction (CC) method developed by Tashima et al were used to modify the microstructures of alumina ceramics, such as an average grain size and number of flaws. As a result, the microstructure of alumina ceramics had significant an effect on its wear behavior, and HIP and CC could reduce the amount of wear. SEM and AFM observation of a worn surface revealed that there were two different wear mechanisms, i.e., one was a removal of grains and another was a microscopic adhesive wear. Both mechanisms were influenced by the microstructures of alumina.
一般社団法人日本機械学会の論文
2000-07-31