Single-phase interdiffusion in B2-RuAl intermetallic compound

The interdiffusion behaviour of single-phase B2-type RuAl was investigated in the temperature range between 1473 and 1773 K. An Arrhenius behaviour is observed with an activation energy of Q = (236 ± 18) kJ mol−1. Variations in DRu-Al due to composition effects were found to be small.