Modulus bioceramics

The Weibull modulus of an alumina bioceramic is given as 8.4. (a) What does a value of m = 8.4 imply (b) For an implant made out of a metal the value of m 100. What implications would this have for lifetime predictions for the metal component compared to the alumina component (c) How does the value of m affect... 

Nevertheless, recently studies of new materials of TZP, doped with yttria tested in simulated body fluids and in animals, have shown slight decreases in fracture toughness and Young Modulus [34-36]. The observed strength, after two years, is sill much higher that the strength of alumina bioceramic tested under similar conditions. Because the zirconia/zirconia... 

The development of mineral-organic composite materials offers the possibility of combining the favorable properties of bioceramics such as the HAP, alumina or titanium dioxide with the molding capacity of biocompatible polymers (polymethylmethacrylate) PMMA [KHO 92], poly(L-lactic) acid PLLA [ROD 95], poly (ethylene) PE pOW 91]). It is also conceivable to attain a value of the modulus of elasticity near to that of the bone. 

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