Process for joining refractory ceramic parts by spark plasma sintering (sps)
AssigneeCommissariat a l'Energie Atomique
InventorsAlexandre Allemand, Fabienne Audubert
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Abstract
A process for joining, by spark plasma sintering, at least two refractory ceramic parts, each of the parts having at least one surface to be joined by spark plasma sintering, in which surfaces to be joined are brought into contact without addition of any sort between the surfaces. Then, a joining pressure of 1 to 200 MPa is applied to the ceramic parts. A pulsed electric current having an intensity of 500 A to 8000 A is applied to the ceramic parts so as to raise the temperature of the parts to a joining temperature of at least 1300° C. Then, the electric current is terminated simultaneously with the pressure, and the parts are cooled, and the joined parts are recovered.
Claims35
A process for joining, by spark plasma sintering, at least two refractory ceramic parts, the process comprising:
- bringing surfaces of the at least two ceramic parts into contact, the surfaces substantially free of bonding aids;
- applying joining pressure of 1 to 200 MPa the at least two ceramic parts;
- applying a pulsed electric current having an intensity of 500 A to 8000 A to the at least two ceramic parts so as to raise the temperature of the parts to a joining temperature of at least 1300° C.;
- cooling the at least two ceramic parts.
Dependencies are inferred from the claim text.