Device for forwarding a medium
First Claim
1. In a device for forwarding a medium in the form of a gas, liquid, or loose particles, whereby the medium can contain additives and/or contaminants in an aggregate state other than that of the medium itself, the device'"'"'s major components are form-fit and force-fit together and comprise at least one supporting component along with blade-like components fastened to it, and at least one supporting component is made of a fiber-filled composite, the improvement wherein at least one supporting component is made of a lattice of essentially continuous fibers formed of at least one of carbon and a ceramic and of a matrix that contains carbon;
- wherein the fibers are sheathed with silicon carbide resulting from the infiltration of liquid silicon and from its reaction essentially with the carbon in the matrix and wherein the fibers in areas of the surface of the components that come into contact with the medium being forwarded extend in a plane essentially parallel or tangential to the direction the medium flows in.
1 Assignment
0 Petitions
Accused Products
Abstract
A device is disclosed for forwarding a medium in the form of a gas, liquid, or loose particles. The medium can contain additives and/or contaminants in an aggregate state other than that of the medium itself. The device'"'"'s major components are form-fit and force-fit together and comprise at least one supporting component along with blade-like components fastened to it. The supporting component is, or the supporting components are, made of a fiber-filled composite. The device is in particular an impeller for a pump, turbine, or similar mechanism. It is characterized in that the supporting component is, or the supporting components are, made of a lattice of essentially continuous fibers of carbon and/or ceramic and of a matrix that contains carbon and in that the fibers are sheathed with silicon carbide resulting from the infiltration of liquid silicon and from its reaction essentially with the carbon in the matrix.
26 Citations
25 Claims
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1. In a device for forwarding a medium in the form of a gas, liquid, or loose particles, whereby the medium can contain additives and/or contaminants in an aggregate state other than that of the medium itself, the device'"'"'s major components are form-fit and force-fit together and comprise at least one supporting component along with blade-like components fastened to it, and at least one supporting component is made of a fiber-filled composite, the improvement wherein at least one supporting component is made of a lattice of essentially continuous fibers formed of at least one of carbon and a ceramic and of a matrix that contains carbon;
- wherein the fibers are sheathed with silicon carbide resulting from the infiltration of liquid silicon and from its reaction essentially with the carbon in the matrix and wherein the fibers in areas of the surface of the components that come into contact with the medium being forwarded extend in a plane essentially parallel or tangential to the direction the medium flows in.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. In a device for forwarding a medium in the form of a gas, liquid, or loose particles, whereby the medium can contain additives and/or contaminants in an aggregate state other than that of the medium itself, the device'"'"'s major components are form-fit and force-fit together and comprise at least one supporting component along with blade-like components fastened to it, and at least one supporting component is made of a fiber-filled composite, the improvement wherein at least one supporting component is made of a lattice of essentially continuous fibers formed of at lease one of carbon and a ceramic and of a matrix that contains carbon;
- wherein the fibers are sheathed with silicon carbide resulting from the infiltration of liquid silicon and from its reaction essentially with the carbon in the matrix;
wherein the silicon carbide is formed when liquid silicon infiltrates a prescribed system of pores in the fiber lattice and reacts with the carbon therein; and
wherein the silicon infiltrates in a vacuum at temperatures above 1420°
C., preferably at temperatures ranging from 1450 to 1500°
C., and wherein the silicon carbide is formed by maintaining the temperature at approximately 1650°
C. for approximately two hours or by increasing the temperature to approximately 2000°
C. and maintaining it there for an accordingly abbreviated time of up to approximately one hour.
- wherein the fibers are sheathed with silicon carbide resulting from the infiltration of liquid silicon and from its reaction essentially with the carbon in the matrix;
Specification