The aim here was the determination of the interdiffusion characteristics in the β-solid solution of Ti–Zr alloys (from 830 to 1730C). The interdiffusion coefficients in this binary system were calculated by the den Broeder method. The interdiffusion coefficients were weakly dependent upon the composition: their values lie between approximately 10−9 and 10−7cm2/s. The Hall method was used to determine the diffusion coefficients at the Ti-rich and Zr-rich sides. These coefficients were compared with the impurity diffusion coefficients in the pure metals from the literature, and with coefficients calculated by the Vignes and Birchenhall relation. Whereas the impurity diffusion coefficients in Ti and Zr showed the anomalous diffusion already observed in many body-centered-cubic metals and alloys, this behaviour was not observed for the interdiffusion in the Ti–Zr alloys. These results were compared with the results obtained in the binary systems Ti–Hf and Zr–Hf.

Interdiffusion in β-Ti–Zr Binary Alloys. I.Thibon, D.Ansel, T.Gloriant: Journal of Alloys and Compounds, 2009, 470[1-2], 127-33