Brazing TC4 alloy to Si3N4 ceramic using nano-Si3N4 reinforced AgCu composite filler

• Brazing of TC4 to Si3N4 was achieved with nano-Si3N4 reinforced AgCu filler.
• Nano-Si3N4 addition suppressed the growth of brittle compound layers in joints.
• Nano-Si3N4 addition could improve the shear strength of TC4/Si3N4 brazed joints.
• Interfacial microstructural morphology depended on the brazing temperature.