Intergranular mass transport measurements were performed using 59Fe, 63Ni and 124Sb and Auger electron spectroscopy. It was found that Sb segregation in Fe-Sb, and Ni-Sb co-segregation in Fe-Ni-Sb, markedly decreased the grain boundary mass transport parameters. The Fe and Sb grain boundary diffusion coefficients were almost the same in the two alloys when the grain boundary Sb concentrations were the same. The presence of Ni in the grain boundary did not affect the grain boundary diffusion of Ni in Fe-Ni alloys (table 181), but markedly decreased it in Fe-Ni-Sb alloys. It was concluded that the behavior of Ni was more closely related to the simultaneous presence of Sb and Ni than to the grain boundary composition itself.

P.Gas, S.Poize, J.Bernardini: Acta Metallurgica, 1986, 34[3], 395-403