708 人工心臓用ピボット軸受の摩耗試験について (II)

抄録

To improve the durability of centrifugal blood pumps, rotational wear tests and creep tests for pivot bearings were conducted. The pivot was assumed to be composed of a male pivot made of semi-sphere ceramic and a female pivot made of ultra high molecular weight polyethylene (UHMWPE). Regarding the female pivot, three kinds of UHMWPE were compared for two molecular weights and with/without gamma lay processing. The experimental results showed that the durability of gamma lay processed UHMWPE was the best against wear and that the creep characteristics were commonly recognized.