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A comparison of the mechanical behavior of aluminas in air and simulated body environments

✍ Scribed by Dalgleish, B. J. ;Rawlings, R. D.

Publisher
John Wiley and Sons
Year
1981
Tongue
English
Weight
792 KB
Volume
15
Category
Article
ISSN
0021-9304

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✦ Synopsis

Abstract

Fracture toughness and modulus of rupture tests have been carried out on three aluminas, which differed in composition and microstructure, in a variety of environments (air, deionized water, albumen/salt solution, Ringer's solution, and fresh human plasma). Generally tests in liquid environments were found to result in a reduction in the asmeasured critical stress intensity factor and the modulus of rupture, as compared with the values appertaining to air. However, estimates of the stress for a 50‐year, 99.9% survival probability were encouraging; for high‐purity, small‐grain‐size alumina a value of 112 MN/m^2^ was calculated, which is considerably greater than the estimated maximum tensile stress in a femoral sphere.

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