Increasing Fatigue Endurance of Hydroxyapatite and Rutile Plasma Sprayed Biocomponents by Controlling Deposition In-Flight Properties

0504988 - ÚFP 2020 RIV US eng J - Článek v odborném periodiku
Čížek, Jan - Kovářík, O. - Šiška, Filip - Bensch, J. - Čupera, J. - Matějková, M. - Siegl, J. - Chráska, Tomáš - Khor, K.A.
Increasing Fatigue Endurance of Hydroxyapatite and Rutile Plasma Sprayed Biocomponents by Controlling Deposition In-Flight Properties.
ACS BIOMATERIALS SCIENCE & ENGINEERING. Roč. 5, č. 4 (2019), s. 1703-1714. ISSN 2373-9878. E-ISSN 2373-9878
Grant CEP: GA ČR GB14-36566G
Grant ostatní: Ministerstvo průmyslu a obchodu - GA MPO(CZ) CZ.02.1.01/0.0/0.0/16_019/0000778
Institucionální podpora: RVO:61389021 ; RVO:68081723
Klíčová slova: atmospheric plasma spray * fatigue testing * ha * in situ PIV * titania
Obor OECD: Materials engineering; Materials engineering (UFM-A)
Impakt faktor: 4.152, rok: 2019
Způsob publikování: Omezený přístup
https://pubs.acs.org/doi/10.1021/acsbiomaterials.8b01545

Three sets of hydroxyapatite and rutile-TiO 2 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 m s1 , 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 TiO 2 layers.
Trvalý link: http://hdl.handle.net/11104/0296518