Disclosed is a ceramic sliding partner for a sliding bearing, said sliding partner being made at least in part, preferably entirely, of a ceramic foam. The ceramic sliding partner comprises at least one sliding surface on which a sliding partner can move, said sliding surface being made at least in part, preferably entirely, of a ceramic foam.

An artificial femoral ball head having a multilayer shell-core composite structure includes a spherical shell layer, a transition layer and an inner core. The inner core is made of a toughened ceramic, the spherical shell layer is made of a ceramic material, and the transition layer is made of a composite material comprising materials of the inner core and the spherical shell layer. The artificial femoral ball head is manufactured through sintering a green body of successively stacked layers of the spherical shell layer, the transition layer and the inner core, and the green body of successively stacked layers is obtained through a powder co-injection molding process. The spherical shell layer of the artificial femoral head has a high rigidness, corrosion-proof and wear-proof performance. The inner core of the artificial femoral head has a high toughness and shockresistant performance.

The present invention relates to a new application of a porous material. The porous material is composed of pore cavities and cavity walls surrounding the pore cavities, wherein the pore cavities of the porous material are three-dimensionally interconnected; the capillary force of the porous material is 5 Pa or more; and a contact angle between a surface of the cavity wall of the porous material and a liquid phase material circulating therein is less than 90. The porous material is applied as a microcirculation power source. The porous material is used in a circulation system as a microcirculation power source for providing material exchange. The porous material is used in a separation system as a microcirculation power source for providing material separation and movement. The porous material is used in a medical implant system as a microcirculation power source for providing tissue cell growth.

An artificial acetabulum having a multilayer shell-core composite structure includes a ceramic acetabular liner, a transition layer and an acetabular shell. The acetabular shell is made of a porous metal, a porous alloy or a porous toughened ceramic; the ceramic acetabular liner is made of a ceramic material; and the transition layer is made of a composite material comprising materials of the acetabular shell and the ceramic acetabular liner. The artificial acetabulum is manufactured through sintering a green body of successively stacked layers of the ceramic acetabular liner, the transition layer and the acetabular shell, and the green body of successively stacked layers is obtained through a powder co-injection molding process. The ceramic acetabular liner of the artificial acetabulum has a high rigidness, corrosion-proof and wear-proof performance. The acetabular shell of the artificial acetabulum has a high toughness and shock resistant performance.