The Effects of Cr_2O_3 Addition on Fracture Toughness and Phases of ZTA Ceramic Composite

摘要

Fracture toughness and phases of ceramic composites produced from alumina, yttria stabilized zirconia and chromia oxide system was investigated. The Cr_2O_3 weight percent was varied from 0 wt% to 1.0 wt%. Each batch of composition was mixed, uniaxially pressed 13 mm diameter and sintered at 1600°C for 4 h in pressureless conditions. Studies on their mechanical and physical properties such as Vickers hardness and fracture toughness were carried out. Results show that an addition of 0.6 wt% of Cr_2O_3 produces the best mechanical properties. Results of the highest fracture toughness is 4.73 MPa·m~(1/2).