Sliding member and method of manufacturing sliding member
AssigneeKYOCERA Corporation
InventorsTakayuki Murakami, Taito Nakamura, Junji Ikeda
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Abstract
To provide a sliding member having improved wear resistance, and a method of manufacturing the sliding member. A femoral head ball according to an aspect of the present disclosure includes a composite ceramic containing alumina and at least one oxide other than alumina. A surface roughness Ra of the sliding surface when the femoral head ball slides against a constituent member constituting an artificial joint is not more than 0.01 μm. The sliding surface includes a plurality of recessed portions each having an opening diameter of not more than 2 μm.
Claims9
A method for manufacturing a sliding member, the method comprising:
- immersing a surface of a base material in a one or more strong acid solution or acid washing the surface of the base material, the base material comprising a composite ceramic, the composite ceramic including an alumina and at least one oxide except alumina, wherein
- the composite ceramic comprises from 65 to 96 wt % of alumina and from 4 to 34.4 wt % of zirconia, wherein
- the sliding member is an artificial bone head, and
- the surface of the base material is configured to be in contact with a member when the artificial bone head and the member are used in a human body, the member being an acetabular cup or a liner.
Dependencies are inferred from the claim text.