CORRELATION BETWEEN Nd2Fe14B GRAIN BOUNDARIES AND ANNEALING EFFECTS IN COERCIVITY OF Nd-Fe-B MAGNETS Tang Weizhong, Zhou Shouzeng, Wang Run and Yang Fuming J. Phys. Colloques, 49 C8 (1988) C8-635-C8-636 DOI: 10.1051/jphyscol:19888287