Grain Boundary Diffusion and Segregation of Co and Cr in Zr-Based Alloys
51Cr and 60Co diffusion along grain boundary (GB) in polycrystalline Zr and -Zr-20%Nb were measured by means of the radiotracer technique in an overall temperature range [380-1000] K. The use of Harrison´s C and B kinetics resulted in direct data of the GB diffusivity (Dgb) and the apparent GB diffusivity (Pgb). The analyzed temperatures involved those of power reactors service. The GB segregation factors s were determined or evaluated in the limit of very dilute solute concentration.
Andreas Öchsner, Graeme E. Murch and Ali Shokuhfar
C. Corvalán Moya et al., "Grain Boundary Diffusion and Segregation of Co and Cr in Zr-Based Alloys", Defect and Diffusion Forum, Vols. 283-286, pp. 669-674, 2009