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Residual stress distribution in ceramic/metal systems by nondestructive techniques

✍ Scribed by Adele Carradò

Publisher
Elsevier
Year
2011
Tongue
English
Weight
530 KB
Volume
10
Category
Article
ISSN
1877-7058

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✦ Synopsis

The bio-ceramic coatings on metallic implants are proposed to be a solution for combining the mechanical properties of the metal with the necessarily bioactive character of the ceramic layer, leading to a better integration of the entire implant. In this paper, the determination of residual stresses in such systems by non-destructive methods is presented for a mock-up of an implant constituted by two different biomedical ceramic/metal systems: (i) titanium dental implants and (ii) porcelain crown. Stress distributions are reported in: (i) a thin hydroxyapatite coating (50 m) deposited by plasma-spray ceramic films on titanium alloy as well as (ii) a multilayer consisting of a layer (1.8 mm) of glassyceramic and opaque ceramic (0.35 mm), normally Porcelain-Fused-to-Metal on a palladium substrate (1.6 mm).

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