Method for Obtaining at Least One Ceramic Component by Joining at Least Two Ceramic SIC Preforms and Ceramic Components Obtained by Said Method

A method for obtaining at least one ceramic component by joining at least two SiC preforms:

• providing at least two porous SiC preforms, each having at least one joining surface;
• applying a joining slurry to each joining surface of the at least two preforms, the joining slurry comprising.
• 40-to 80 wt % of at least one binding agent,
• 2-to 20 wt % of silicon carbide particles with a particle size D50 (DIN EN 725-5, ISO 13320) of 10 -10 to 20 μm,
• 8-to 25 wt % of silicon carbide particles with a particle size D50 (DIN EN 725-5, ISO 13320) of 1-10 10 μm,
• 10-to 30 wt % of carbon black,
• wherein the sum of all ingredients always adds up to 100 wt %;
• pressing the joining surfaces of the at least two SiC preforms together;
• drying the at least two SiC preforms;
• and
• heating up the at least two SiC preforms, whereby Si is infiltrated into the SiC preforms comprising a dried joining slurry to obtain a materially bonded silicon-silicon carbide (SiSiC) ceramic component.