The diffusion of B at 900 to 1200C was measured by means of particle-tracking autoradiography. The results could be described by:

D (cm2/s) = 6.6 x 10-3 exp[-23.0(kcal/mol)/RT]

W.Wang, S.Zhang, X.He: Acta Metallurgica et Materialia, 1995, 43[4], 1693-9