Comportamineto termomecánico de materiales basados en titanio de circonio y circona cúbica

Zirconium titanate presents crystallographic anisotropy in thermal expansion. Hence, it can be considered as component of low thermal expansion materials. Thus, zirconium titanate materials are candidates for structural applications for which it is necessary to characterise their thermomechanical behaviour, not reported in the available literature. In this work, the thermomecanical behaviour of zirconium titanate materials has been characterized in terms of thermal expansion coefficient, Young modulus, fracture strength, fracture toughness and work of fracture. Fracture toughness and work of fracture have been determined by controlled fracture tests. Results are discussed on the basis of the composition and microstructure of the materials. PALABRAS CLAVE: titanato de circonio, propiedades mecanicas, ensayos de fractura controlada. 1. INTRODUCCION