Mechanical Properties of Dysprosia (Dy2O3) Added Al2O3 ZrO2 HA Composite
Alumina (Al2O3)-zirconia (ZrO2)-hydroxyapatite (HA) composite is used as biomaterials. Biomaterials must be bio-compatible to the body and should have excellent mechanical and tribological properties. 1 wt.% of rare earth oxide (Dy2O3) was added to the basic composition of composite Al2O3 -ZrO2 (15wt.%)-HA(1wt.%). The powder mixture was hot-pressed at 1300°C in Ar gas environment under 30 MPa pressure for densification sintering. The microstructural analysis, phase transformation, surface morphology and mechanical properties like hardness, fracture toughness, mechanical strength of the composite were observed and evaluated by SEM , XRD, Vickers hardness, etc. The results demonstrated that the addition of 1 wt.% dysprosia has increased the mechanical properties of composite.
Hyungsun Kim, Jian Feng Yang, Chuleol Hee Han, Somchai Thongtem and Soo Wohn Lee
H. S. Kim et al., "Mechanical Properties of Dysprosia (Dy2O3) Added Al2O3 ZrO2 HA Composite", Materials Science Forum, Vol. 695, pp. 525-528, 2011