Diffusion of Cobalt out of Cobalt‐Hardened Gold Measured with Auger Electron Spectroscopy

The diffusion of cobalt out of a gold layer is considered. The theory is discussed to relate measured quantities to diffusion coefficients. Measurements were taken and appropriate calculations made to obtain values for the coefficients at 100° and 150°C. Arrhenius plot extrapolations are then made to obtain approximate values at ambient temperatures.