Material
Basic Properties BIOLOX forte and BIOLOX delta
Material Properties BIOLOX delta
Combinations, Applications, and Production
Toughening Mechanism
The principle of transformation toughening
by nano-sized, yttria-stabilised, zirconia particles,
which are dispersed in the alumina matrix. 1. Alumina
2. Zirconia
The first toughening mechanism is the introduction of nano-sized, yttria-stabilized tetragonal zirconia particles (Y-TZP) in a stable alumina matrix. These Y-TZP grains are spacially separated from one another in order to reduce the likelihood of structural transformation as well as to prevent the initiation and propagation of cracks.
Furthermore, the dispersion of fine particles in the matrix improves the strength and toughness of BIOLOX®delta components as shown in Fig 1. This mechanism functions like the airbag system in your car.
The principle of reinforcement by platelet-like
crystals in an alumina matrix. 1. Platelet-like crystal.
The second toughening mechanism is achieved by the addition of an oxide additive which forms platelet-like crystals. These platelets dissipate energy by deflecting cracks, thereby increasing strength and toughness.