Interfacial reactions in As---Se/Zn

As-Se-based chalcogenide glasses are IR transparent, and are an ideal braze for the ZnSe and ZnS. Interfacial reactions between As-Se and Zn were investigated using reaction couples As-50 at.% Se/Zn at 350°C, As-50 at.% Se/Zn at 370°C and As-60 at.% Se/Zn at 350°C. Cross-sections of reaction couples were analyzed by using optical microscopy and electron probe micro-analysis. Two phases were formed at the interface, and diffusion paths were glass/ZnSe/As₂Zn₃/Zn. Growth rates of the intermetallic layers were determined and at 350°C follow a parabolic law which indicates a diffusion-controlled mechanism.