Carburising Example
An alloy with 0.25% C is carburised at 950oC under conditions which raise the surface carbon concentration to 1.2%. How long will it take to achieve a carbon content of 0.8% at a position 0.5mm below the surface?
Typical diffusion coefficient D=1.6x10-11m2/s
c0=0.25%, cs=1.2%, cx=0.8% at x=0.5