The interdiffusion behaviour of single-phase B2-type RuAl was investigated at 1473 to 1773K (figure 4). Arrhenius behaviour was observed, with an activation energy of 236kJ/mol. Variations in DRu–Al, due to compositional effects, were found to be small.

Single-Phase Interdiffusion in B2-RuAl Intermetallic Compound. K.Woll, C.Holzapfel, H.A.Gobran, F.Mücklich: Scripta Materialia, 2007, 57[1], 1-4

Figure 4

Interdiffusion in RuAl