Gas phase permeation techniques were used to determine the permeability and diffusivity of D in Mo-47.5wt%Re. The measurements were performed at 340 to 850C, and pressures ranging from 1300 to 105N/m2. The diffusivity results could be described by:

D(m2/s) = 0.00014 exp[-74.4(kJ/mol)/RT]

M.R.Shanabarger: Scripta Metallurgica et Materialia, 1994, 30[6], 749-53