Zirconia-spinel composites. Part II: mechanical properties

Olivier Quénard (1) , Christophe Laurent (1) , Alain Peigney (1) , Abel Rousset (1)

1 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux

The mechanical properties (fracture strength, fracture toughness, and Vickers microhardness) of MgAl2O4 and x wt% ZrO2-MgAl2O4 (1 # x # 30) hot-pressed materials were measured at room temperature. Two kinds of materials, which were prepared from either ball-milled or attrited powders, were investigated. Compared with an unreinforced spinel, a twofold (or greater) increase in both strengthening and toughening was measured for materials with the highest zirconia content (30 wt%). It was found that dispersing only 1 wt% of zirconia in the spinel produced a marked increase in the Vickers microhardness. The total zirconia content appears to be a key parameter.

Mots clés: Zirconia; Spinel; Composites

Domaines: Matériaux

Olivier Quénard, Christophe Laurent, Alain Peigney, Abel Rousset. Zirconia-spinel composites. Part II: mechanical properties. Materials Research Bulletin, 2000, vol. 35, pp. 1979-1987. ⟨10.1016/S0025-5408(00)00409-8⟩. ⟨hal-00949036⟩