Article | REF: IN67 V1

High temperature ceramic joint obtained through thermal spraying

Authors: Séchel METHOUT, Luc BIANCHI

Publication date: January 10, 2009

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3. High-temperature ceramic gasket

In order to achieve an effective seal between two layers making up an SOFC-type solid fuel cell, a ceramic-matrix solid composite gasket loaded with ceramic or glass flux particles is applied by plasma spraying to one or both of the surfaces to be joined. .

The joint is solid, non-deformable and adheres to its substrate at room temperature. It forms and acquires its properties when the system is put into service at temperature, thanks to a mechanism whereby the melting phase migrates by capillary action into the volume of the ceramic matrix, preferentially towards the interface to be joined.

Figure shows the seal conditioning mechanism.

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High-temperature ceramic gasket