MICROSTRUCTURAL AND MECHANICAL CHARACTERISATION OF MULLITE-ZIRCONIA COMPOSITES CONTAINING YTTRIA B. JOLIET, F. CAMBIER, L. DAPRA, C. LEBLUD et A. LERICHE J. Phys. Colloques, 47 C1 (1986) C1-723-C1-728 DOI: 10.1051/jphyscol:19861109