Method For Producing A Molded Body, As Well As A Molded Body
AssigneeSchunk Kohlenstofftechnik GmbH
InventorsJeremias Schoenfeld, Roland Weiss, Gotthard Nauditt
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Abstract
The invention relates to a method for producing a molded body as well as to a molded body, having a silicon carbide support matrix and an integral carbon structure, wherein a base body on the basis of a powder mixture containing silicon carbide or silicon and carbon and of a binder is built in layers in a generative method, and wherein a pyrolysis of the base body is effected for realizing the molded body after the binder has been cured, wherein the carbon content of the carbon structure is adjusted by way of the pyrolysis of the binder and by way of the carbon content of the powder mixture or infiltration of a carbon material into the silicon carbide support matrix.
Claims22
A method for producing a molded body (22, 40), having a silicon carbide support matrix (21) and an integral carbon structure (23),
- wherein a base body on the basis of a powder mixture (50) containing silicon carbide or silicon and carbon and of a binder (51) is built in layers in a generative method,
- and wherein a pyrolysis (56) of the base body is effected for realizing the molded body after the binder has been cured,
- wherein the carbon content of the carbon structure is adjusted by way of the pyrolysis of the binder and by way of the carbon content of the powder mixture or infiltration of a carbon material into the silicon carbide support matrix.
The method according to any one of the preceding claims,
- characterized in that
- the powder mixture (50) presents an SiC particle fraction having particles of an average grain size Ds50 between 0.5 and 100 μm.
The method according to any one of the preceding claims,
- characterized in that
- for adjusting the carbon content of the molded body (22, 40), following the pyrolysis (56) of the base body, the infiltration of the silicon carbide support matrix (21) with a polymer is effected, said polymer being transformed into carbon with the aid of a following pyrolysis.
The method according to any one of the preceding claims,
- characterized in that
- an infiltration of the silicon carbide support matrix (21) with silicon is effected following the pyrolysis (56).
A molded body (22, 40), having a silicon carbide support matrix (21) and an integral carbon structure (23), having a base body that is built in layers in a generative method on the basis of a powder mixture (50) containing silicon carbide or silicon and carbon and of a binder (51),
- wherein the molded body presents a carbon content of 10 to 30% by weight.
Dependencies are inferred from the claim text.