Segregation and mass transport studies of the 60Co tracer along grain boundaries were carried out at 750 to 1080K. The grain boundary diffusion coefficients

were obtained by using the Whipple and Suzuoka methods, and were found to be in good agreement. The grain boundary diffusivities could be described by:

D (cm2/s) = 1.06 x 10-1 exp[-152.7(kJ/mol)/RT]

The segregation of the tracers along the grain boundaries was studied by using autoradiographic techniques.

M.C.Naik, A.R.Paul, K.N.G.Kaimal, K.S.Venkateswarlu: Journal of Materials Science, 1990, 25[3], 1640-4