Measurements were made of the pressure dependence of 95Zr diffusion in structurally relaxed glass at 698K. The resultant activation volume, of 0.9 of the mean atomic volume, was similar to that for vacancy diffusion in crystalline solids. It was suggested that, while Co did not diffuse via thermal defects in Co-rich Co-Zr glasses, Zr self-diffusion was mediated by vacancy-like defects. This provided evidence for the existence of a reversed Kirkendall effect in interdiffusion between certain amorphous alloys

Evidence of Defect-Mediated Zirconium Self-Diffusion in Amorphous Co92Zr8 P.Klugkist, K.Rätzke, F.Faupel: Physical Review Letters, 1998, 81[3], 614-7