CERAMIC OXIDES PREPARED BY MECHANICAL PROCESSING

Structural modifications produced by mechanical stress in a high energ y planetary ball-milling machine were studied for various binary or te rnary oxides with ceramic applications. Phase transformations were sho wn tor titanium (IV) or zirconium oxide and for zirconium silicate (zi rcon) that becomes amorphous after lengthy grinding. By mechanosynthes is, we prepared zircons stabilized with lime and yttrium oxide, as wel l as new amorphous phases obtained from mixtures of alumina and zircon powders.