DIFFUSION INDUCED GRAIN BOUNDARY MIGRATION IN Ni(Zn) POLYCRYSTALS R.A. FOURNELLE, B. GIAKUPIAN, W. GUST and B. PREDEL J. Phys. Colloques, 49 C5 (1988) C5-593-C5-598 DOI: 10.1051/jphyscol:1988574