Phase relations and interfacial reactions in the Ga-P-Co system at 500 degrees C

The isothermal cross section through the ternary phase diagram Ga-P-Co at 5 00 degreesC was constructed. No ternary phases exist in the system at this temperature. All binary Co-P and Go-Ga intermetallics are in equilibrium wi th GaP, which, under these conditions, dissolves up to 4 at.% of cobalt. Th e use of equilibrium phase diagram information in predicting the variation of chemical composition in the diffusion zone during solid-state reaction b etween Cap and Co is demonstrated.