Tribological body and method for producing such a body
AssigneeSchunk Kohlenstofftechnik GmbH
InventorsGert Wahl, Konstantin Lider, Philipp Gingter
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Abstract
The invention relates to a tribological body (10) comprising a body with a sliding surface (12) and at least one hollow space through which a fluid can flow. The body (10) consists of a first monolithic partial body (14) comprising the sliding surface (12) and of a second monolithic partial body (16) connected to the first one, wherein the hollow space is designed as a conduit (20) which runs at least in sections inside the second partial body and is delimited from the latter at least on the bottom side and the side surface sides.
Claims25
A tribological body comprising:
- a body with a sliding surface and at least one hollow space through which fluid can flow,
- wherein the body consists of a first monolithic partial body comprising the sliding surface and of a second monolithic partial body connected to the first one or comprising it, wherein the hollow space is designed as a conduit which runs at least in sections inside the second partial body and is delimited from the latter at least on the bottom side and the side surface sides,
- wherein the first partial body limits the conduit,
- wherein the second partial body consists of reaction-bound silicon carbide and/or boron carbide infiltrated with silicon, wherein the silicon carbide and/or boron carbide has/have a grain size distribution of at least 75 μm,
- wherein the first partial body consists of reaction-bound silicon carbide and/or boron carbide infiltrated with silicon, wherein the silicon carbide and/or boron carbide has an average grain size between 5 μm and 70 μm and/or a grain size distribution of at least 14 μm, and closed macropores with a pore volume <8 vol. %, wherein a diameter DP of the macropores is 0.05 μm<DP<70 μm, and
- wherein the first partial body has a density >2.8 g/cm3.
A method for producing a tribological body, comprising the method steps:
- producing a body with a sliding surface and at least one hollow space through which fluid can flow,
- wherein the body consists of a first monolithic partial body comprising the sliding surface and of a second monolithic partial body connected to the first one or comprising it, wherein the hollow space is designed as a conduit which runs at least in sections inside the second partial body and is delimited from the latter at least on the bottom side and the side surface sides,
- wherein the first partial body limits the conduit,
- wherein the second partial body consists of reaction-bound silicon carbide and/or boron carbide infiltrated with silicon, wherein the silicon carbide and/or boron carbide has a grain size distribution of at least 75 μm,
- wherein the first partial body consists of reaction-bound silicon carbide and/or boron carbide infiltrated with silicon, wherein the silicon carbide and/or boron carbide has an average grain size between 5 μm and 70 μm and/or a grain size distribution of at least 14 μm, and closed macropores with a pore volume <8 vol. %, wherein a diameter DP of the macropores is 0.05 μm<DP<70 μm, and
- wherein the first partial body has a density >2.8 g/cm3,
- joining the first partial body to the second partial body.
Dependencies are inferred from the claim text.