Aspects include methods of fabricating antibacterial surfaces for medical implant devices including patterning a photoresist layer on a silicon substrate and etching the silicon to generate a plurality of nanopillars. Aspects also include removing the photoresist layer from the structure and coating the plurality of nanopillars with a biocompatible film. Aspects also include a system for preventing bacterial infection associated with medical implants including a thin silicon film including a plurality of nanopillars.

The appearance of natural rock faces are formed on planar panels or part portions disposed horizontally by stamping or texturizing a cementatious mixture of veneer material and then selectively applying colorant matter, which may include combinations of stains and mineral.

The appearance of natural rock faces are formed on planar panels or part portions disposed horizontally by stamping or texturizing a cementatious mixture of veneer material and then selectively applying colorant matter, which may include combinations of stains and mineral.

An injection molding apparatus including a ceramic powder material injection device, a mold, and a gas providing device is provided. The ceramic powder material injection device is adapted to contain a ceramic powder material. The mold has a molding concavity, wherein the ceramic powder material injection device is adapted to inject at least the ceramic powder material into the molding concavity. The gas providing device is adapted to provide a gas into the molding concavity to increase a pressure in the molding concavity to increase a density of the ceramic powder material in the molding concavity. In addition, an injection molding method is also provided.

A tool to differentially compress a powder material comprises a differential compression piston and a support. The piston comprises a first part configured to apply a pressure on a first region of an external surface of the powder material. The piston comprises a second part with a recess which is located at a lateral distance from the first part and which is configured to face a second region of the external surface of the powder material. The tool further comprises a membrane that can be deformed by the piston. The deformable membrane is configured to at least partially retain the powder material in the tool.

The present invention is related to a porous ceramic composite structure with high mechanical strength and a wide range of porosity which makes flow rate of fluid highly tunable. The porous ceramic composite structure comprises a dense ceramic sheath and one or more inner porous ceramic bodies. The ceramic sheath provides good mechanical properties, protects the one or more inner porous ceramic bodies, and allows the one or more inner porous ceramic bodies to undergo a wide range of porosity changes while still maintaining excellent mechanical properties.

The invention relates to the making, on a support plate (34), of an annular space (76) in a ceramic paste covering this plate, in order, by successive deposits and firing of layers of said ceramic paste, to create a base of a ceramic shell (40) for the moulding of parts, the base having said annular space (76). For this purpose, between two deposits of said ceramic paste, and on the plate, said deformable annular element (82) will be deformed in order to break the ceramic layer.

A method includes forming a ceramic member that has a plurality of closed pores within a ceramic matrix. The forming includes compacting a ceramic powder to form intra-particle pores between particles of the ceramic powder, and sintering the compacted ceramic powder to cause diffusion of the ceramic powder and formation of the ceramic matrix. The diffusion does not fill the intra-particle pores and leaves the closed pores.

A method includes forming a ceramic member that has a plurality of closed pores within a ceramic matrix. The forming includes compacting a ceramic powder to form intra-particle pores between particles of the ceramic powder, and sintering the compacted ceramic powder to cause diffusion of the ceramic powder and formation of the ceramic matrix. The diffusion does not fill the intra-particle pores and leaves the closed pores.

A mold and a method of manufacturing GOS ceramic scintillator by using the mold are provided. The mold comprises: a female outer sleeve having a cavity disposed inside; a plurality of female blocks disposed inside the cavity, the plurality of female blocks being put together to form a composite structure having a vertical through hole; and a male upper pressing head and a male lower pressing head, wherein each of the male upper pressing head and the male lower pressing head has a shape consistent with that of the vertical through hole. The disclosure may reduce defects of the related art in hot-pressing-sintering such as a mold has a short retirement period and a high material waste, significantly reduce the cost for production of the GOS ceramic scintillator, and significantly improve a process economy.