Cr GRAIN BOUNDARY DIFFUSION IN Cr2O3 A.C.S. SABIONI, B. LESAGE, A.M. HUNTZ, J. BESSON, C. DOLIN et C. MONTY J. Phys. Colloques, 51 C1 (1990) C1-611-C1-616 DOI: 10.1051/jphyscol:1990196