Abstract
Hot-pressed Si3N4 was joined using Ag57Cu38Ti5 brazing filler metal at 1103 to 1253 K for 5 min in a vacuum. The interface reactions between Si3N4 and the brazing filler metal during brazing are reported. An important event is sufficient interface reaction, characterized by the formation of a layer of TiN with an appropriate thickness at the ceramic-filler interface. The joining strength of the butt joint depends on the interface reaction, and a maximum joining strength of 490 MPa measured by the four-point-bend method is achieved for the Si3N4-Si3N4 joint brazed at 1153 K for 5 min. It is also discussed how to design the best brazing filler metal for joining ceramic to ceramic or ceramic to metal.
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Xian, A.P., Si, Z.Y. Joining of Si3N4 using Ag57Cu38Ti5 brazing filler metal. J Mater Sci 25, 4483–4487 (1990). https://doi.org/10.1007/BF00581112
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DOI: https://doi.org/10.1007/BF00581112