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|Title:||Increasing fatigue endurance of hydroxyapatite and rutile plasma sprayed biocomponents by controlling deposition in-flight properties||Authors:||Cizek, J.
Khor, Khiam Aik
|Keywords:||Engineering::Aeronautical engineering||Issue Date:||2019||Source:||Cizek, J., Kovarik, O., Siska, F., Bensch, J., Cupera, J., Matejkova, M., Siegl, J., Chraska, T. & Khor, K. A. (2019). Increasing fatigue endurance of hydroxyapatite and rutile plasma sprayed biocomponents by controlling deposition in-flight properties. ACS Biomaterials Science & Engineering, 5(4), 1703-1714. https://dx.doi.org/10.1021/acsbiomaterials.8b01545||Journal:||ACS Biomaterials Science & Engineering||Abstract:||Three sets of hydroxyapatite and rutile-TiO₂ coatings were plasma sprayed onto metallic substrates. The spray parameters of the sets were modified so as to obtain different in-flight temperatures and velocities of the powder particles within the plasma jet (ranging from 1778 to 2385 K and 128 to 199 ms⁻¹, respectively). Fatigue endurance of the coated specimens was then tested. The samples were subjected to a symmetric cyclical bend loading, and the crack propagation was monitored until it reached a predefined cross-section damage. The influence of the coating deposition was evaluated with respect to a noncoated reference set and the in-flight characteristics. Attributed to favorable residual stress development in the sprayed samples, it was found that the deposition of the coatings generally led to a prolongation of the fatigue lives. The highest lifetime increase (up to 46% as compared to the noncoated set) was recorded for the coatings deposited under high in-flight temperature and velocity. Importantly, this was achieved without significantly compromising the microstructure or phase composition of the deposited HA and TiO₂ layers.||URI:||https://hdl.handle.net/10356/151593||ISSN:||2373-9878||DOI:||10.1021/acsbiomaterials.8b01545||Rights:||© 2019 American Chemical Society. All rights reserved.||Fulltext Permission:||none||Fulltext Availability:||No Fulltext|
|Appears in Collections:||MAE Journal Articles|
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