|About this Abstract
||Materials Science & Technology 2011
||MS&T'11 Poster Session
||031 Alumina-Based Composites Reinforced with Titanium Nanoparticles
||Enrique Rocha, José A. Rodríguez-García, Sergio Mundo-Solís, Juliana G. Gutiérrez-Paredes, Elizabeth Refugio-García
|On-Site Speaker (Planned)
The effect of titanium nanoparticles additions on the fracture toughness of Al2O3-based composites is explored in this study. Mixtures of alumina with different titanium amounts (0.5, 1, 2, 3 wt %) were high energy grinded in a Symoloyer mill during 8h. After milling, the powder was constituted by very fine particles of 200 nm average sizes, presenting good distribution between titanium and alumina particles. Microstructure observations by electron microscopy of uniaxial compacted and pressureless sintered samples, illustrate dense composite materials with a fine and homogeneous distribution of titanium in the alumina-matrix. From fracture toughness measurements, estimate by the fracture indentation method, it has determined that titanium additions has improved fracture toughness until more than 50% with respect to the fracture toughness of monolithic-alumina. This behavior can be due to the formation of metallic bridges by titanium in the alumina-matrix.