Metal-ceramic composite material and method for production thereof
OwnerMichael Scheydecker, Tanja Tschirge +2inventors
InventorsMichael Scheydecker, Tanja Tschirge, Markus Walters, Karl Weisskopf
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Abstract
A metal-ceramic composite material has a ceramic matrix and a metallic phase, which are intermingled with one another, together form a virtually completely dense body and are in contact with one another at boundary surfaces. An interlayer between the metallic phase and the ceramic matrix has a thickness of between 10 nm and 1 000 nm and is composed of reaction products of the metallic phase and the ceramic phase.
Claims14
1-12. (Cancelled)
A metal-ceramic composite material comprising:
- a ceramic matrix;
- at least one metallic phase;
- and
- an interlayer between the metallic phase and the ceramic matrix;
- wherein
- the metallic phase and ceramic matrix are intermingled with one another, together form a virtually completely dense body, and are in contact with one another at the interlayer;
- and
- the interlayer has a thickness of between 10 nm and 1 000 nm, wherein the interlayer consists of reaction products of the metallic phase and the ceramic matrix.
A metal-ceramic composite material according to claim 1, wherein the metallic phase is a magnesium-free aluminium alloy.
A metal-ceramic composite material according to claim 1, wherein the ceramic matrix comprises at least one oxide of a transition metal or of silicon, or boron carbide.
A metal-ceramic composite material according to claim 1, wherein the ceramic matrix comprises titanium oxide.
A metal-ceramic composite material according to claim 1, wherein the interlayer comprises titanium aluminides.
A metal-ceramic composite material according to claim 1, wherein pores in the ceramic matrix, which are filled by the metallic phase, have a pore radius of between approximately 0.5 μm and 4 μm.
A metal-ceramic composite material according to claim 1, wherein grains of the ceramic matrix have a mean grain size of 0.3 μm.
A process for producing a metal-ceramic composite material, comprising the steps of:
- shaping a ceramic powder to form a porous ceramic shaped body;
- infiltrating the ceramic shaped body with liquid metal;
- reacting the liquid metal with ceramic particles of the ceramic shaped body;
- and
- forming an interlayer which contains reaction products of the ceramic shaped body and the liquid metal;
- wherein a contact time between the liquid metal and the ceramic particles is less than 10 seconds.
A metal-ceramic composite material comprising:
- a ceramic matrix;
- at least one metallic phase;
- and
- at least one interlayer present at surfaces of ceramic grains which form the ceramic matrix;
- wherein
- the metallic phase and ceramic matrix are intermingled with one another, together form a virtually completely dense body, and are in contact with one another at the interlayer;
- and
- the interlayer has a thickness of between 10 nm and 1 000 nm, wherein the interlayer consists of reaction products of the metallic phase and the ceramic matrix.
Dependencies are inferred from the claim text.