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Materials 2018, 11(11), 2226; https://doi.org/10.3390/ma11112226

Interfacial Microstructure and Properties of Si3N4 Ceramics/Cu/304 Stainless Steel Brazed by Ti40Zr25B0.2Cu Amorphous Solder

School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China
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Received: 18 October 2018 / Revised: 2 November 2018 / Accepted: 6 November 2018 / Published: 9 November 2018
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Abstract

Si3N4 ceramics and 304 stainless steel were brazed by Ti40Zr25B0.2Cu amorphous solder, and the interfacial microstructure of brazed joint Si3N4 ceramics/Ti40Zr25B0.2Cu/Cu/Ti40Zr25B0.2Cu/304 stainless steel was analyzed. The mechanical properties of the brazed joint were overtly affected by the brazing temperature and Cu foil thickness. The results revealed that the interface structure of the brazed joint might be 304 stainless steel/FeTi/Cu-Zr+Cu-Ti+Fe-Ti/Cu(s,s)/Cu-Zr+Cu-Ti+Fe-Ti/Ti-Si+Zr-Si/TiN/Si3N4 ceramics. The four-point bending strength of the brazed joint decreased sharply as the brazing temperature increased and reached a maximum of 76 MPa at 1223 K. Furthermore, as the Cu foil thickness was increased from 500 μm to 1000 μm, the joint strength rose to 90 MPa at 1223 K. View Full-Text
Keywords: Si3N4 ceramics; intermediate layer; Cu interfacial structure; connection strength Si3N4 ceramics; intermediate layer; Cu interfacial structure; connection strength
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Xu, X.; Wang, Y.; Zou, J.; Xia, C. Interfacial Microstructure and Properties of Si3N4 Ceramics/Cu/304 Stainless Steel Brazed by Ti40Zr25B0.2Cu Amorphous Solder. Materials 2018, 11, 2226.

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