INTERDIFFUSION IN THE BETA-MO-TI SOLID-SOLUTION AT HIGH-TEMPERATURES

Interdiffusion between titanium and molybdenum has been investigated a t high temperatures from 1250 to 1800 degrees C. A Kirkendall effect w as noticed. The interdiffusion coefficients evaluated by the Den Broed er method are strongly dependent on the composition. The Hall method i s used to determine the diffusion coefficients at the concentration li mits. These coefficients are compared with the impurity diffusion coef ficients in the pure metals from the literature, and with coefficients calculated by the Vignes and Birchenhall relation. This binary system does not exhibit an anomalous behaviour. The interdiffusion coefficie nt at the Kirkendall interface is also calculated by the Heumann metho d and compared with the results of our previous calculations.