Al2O3/Al2O3JointBrazedwithAl2O3-particulate-containedCompositeAg-Cu-TiFillerMaterial

Microstructure and interfacial reactions of AI2O3 joints brazed with AI2O3-particulate-contained composite Ag-Cu-Tifiller material were researched by scanning electron microscopy (SEM), electron probe microscopy analysis (EPMA),energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). The interfacial reaction layer thickness of jointsbrazed with conventional active filler metal and active composite filler materials with different volume fraction ofAI2O3 particulate was also studied. The experimental results indicated although there were AI2O3 particulates addedinto active filler metals, the time dependence of interfacial layer growth of joints brazed with active composite fillermaterial is t1/2 as described by Fickian law as the joints brazed with conventional active filler metal.