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The Co22.5Si77.5 (at.%) braze was used to bond porous Si3N4 ceramics. The effects of brazing temperature on microstructure and the bonding strength of the joint were studied. The results reveal that no visible reaction layer was observed. The corresponding joint strength was low. In order to improve the joint strength a carbon coated modification of the porous Si3N4 substrate was suggested. The impact...
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