Residual stresses plasma-sprayed hydroxyapatite coatings

Tsui, Y.C., Doyle, C., and Clyne, T.W. (1998a) Plasma sprayed hydroxyapatite coatings on titanium substrates. Part 1 mechanical properties and residual stress levels. Biomaterials, 19, 2015-2029. 

Residual Stresses in Plasma-Sprayed Hydroxyapatite Coatings 7.6.6.1 Stress Analysis by X-ray Diffraction... 

Figure 7.49 Relation between adhesive failure and compressive residual stresses of plasma-sprayed hydroxyapatite coatings on Ti6AI4V. (Adapted from Yang and Chang (2001).)...

Y. (2014) Effect of dissolution/precipitation on the residual stress redistribution of plasma-sprayed hydroxyapatite coatings on titanium substrate in simulated body fluid (SBF). J. Mech. Behav. Biomed. Mater. 36, 98-108. 

Sergo, V., Sbaizero, O., and Clarke, D.R. (1997) Mechanical and chemical consequences of the residual stresses in plasma sprayed hydroxyapatite coatings. Biomaterials, 18 (6), 477-482. 

Yang, Y.C. (2007) Influence of residual stress on bonding strength of the plasma-sprayed hydroxyapatite coating after the vacuum heat treatment. Surf. Coat. Int., 201, 7187-7193. 

Yang, Y.C. and Chang, E. (2001) Influence of residual stress on bonding strength and fracture of plasma-sprayed hydroxyapatite coatings on Ti-6A1-4V substrate. Biomaterials, 22 (13), 1827—1836. 

Some examples of applications of neutron and synchrotron radiation diffraction applied to the determination of residual stresses in various industrial and technological components have been presented. The reliability of the technique has been shown, being able to determine residual stresses induced by various thermomechanical treatments, such as shrink-fit joints, welds and surface treatments in automotive and aerospace materials. It has been shown how, by this method, it is possible to determine stresses both in the coating and in the substrate of plasma-spray deposed hydroxyapatite layers on Ti alloy for biomedical applications. 

The effect of residual stress on the dissolution of hydroxyapatite coatings was investigated on plasma-sprayed coatings of 80, 110 and 200 pm thickness (Han, Xu and Lu, 2001). Residual stresses in the coatings were measured with a holedrilling method. Dissolution of the coatings was monitored along with an examination of the phase composition. The results showed that both tensile residual... 

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