Nickel and zirconia toughened alumina prepared by hydrothermal processing
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Ceramics are attractive candidates for structural systems due to their strength at high temperatures. However, the major limitation to their application is their low fracture toughness. A major research objective for ceramic communities has, therefore, been to improve the fracture toughness of ceramics. The past two decades have seen the emergence of a number of studies concerned with toughening [1, 2, 3]. There are two types of mechanisms to improve the resistance to crack propagation, that is, by increasing the inherent toughness (energy dissipation) of the material and reducing the local crack-tip driving force , such as residual stress effects, phase transition toughening, crack deflection, nano-composites toughing, and bridging by ductile particles, fibers, and whiskers . The addition of a dispersed second-phase inclusion, which limits the propagation of cracks is one of the most commonly used approaches. With the addition of either zirconia particles  or silicon carbide...
KeywordsFracture Toughness Boehmite Zirconia Particle ZrO2 Particle Zirconium Hydroxide
This work was supported by the Natural Science Foundation of Shanxi Province (20050016).
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