Diffusion of mercury in Ag2Hg3

Abstract

Volume and grain‐boundary difusion coefficients of mercury in Ag₂Hg₃ were measured by the residual activity method at 50, 74, and 102 °C. The volume and grain‐boundary diffusion coefficients may be expressed respectively as D_v=1.2×10⁻⁴ exp (−7.25×10³/RT) cm²/sec and D_g=22.8 exp (−4.56×10³/RT) cm²/sec. Grain‐boundary diffusion coefficients, which varied from 2.07×10⁻² cm²/sec at 50 °C to 5.32×10⁻² cm²/sec at 102 °C, indicate that mercury dissolves the grain boundary of the Ag₂Hg₃ alloy.