Low-energy plasma spray (LEPS) deposition of hydroxyapatite/poly-ε- caprolactone biocomposite coatings

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dc.contributor.authorGarcia-Alonso, Diana
dc.contributor.authorParco, Maria
dc.contributor.authorStokes, Joseph
dc.contributor.authorLooney, Lisa
dc.contributor.institutionEXTREMAT
dc.date.accessioned2024-07-24T12:03:04Z
dc.date.available2024-07-24T12:03:04Z
dc.date.issued2012-01
dc.description.abstractThermal spraying is widely employed to deposit hydroxyapatite (HA) and HA-based biocomposites on hip and dental implants. For thick HA coatings (>150 μm), problems are generally associated with the build-up of residual stresses and lack of control of coating crystallinity. HA/polymer composite coatings are especially interesting to improve the pure HA coatings' mechanical properties. For instance, the polymer may help in releasing the residual stresses in the thick HA coatings. In addition, the selection of a bioresorbable polymer may enhance the coatings' biological behavior. However, there are major challenges associated with spraying ceramic and polymeric materials together because of their very different thermal properties. In this study, pure HA and HA/poly-ε-caprolactone (PCL) thick coatings were deposited without significant thermal degradation by low-energy plasma spraying (LEPS). PCL has never been processed by thermal spraying, and its processing is a major achievement of this study. The influence of selected process parameters on microstructure, composition, and mechanical properties of HA and HA/PCL coatings was studied using statistical design of experiments (DOE). The HA deposition rate was significantly increased by the addition of PCL. The average porosity of biocomposite coatings was slightly increased, while retaining or even improving in some cases their fracture toughness and microhardness. Surface roughness of biocomposites was enhanced compared with HA pure coatings. Cell culture experiments showed that murine osteoblast-like cells attach and proliferate well on HA/PCL biocomposite deposits.en
dc.description.sponsorshipThe authors would like to thank Dr N.E. Vrana (MPRC, DCU, Ireland) for his help during biological testing and interpretation of cellular response results, T. Fernández Landaluce (TU Eindhoven, The Netherlands) for her help with the XPS measurements and data interpretation, and Prof. R. Heimann (TU Bergakademie, Germany) for his advice during the elaboration of this article. This research was supported by a Marie Curie Early Stage Research Training Fellowship of the European Community®s Sixth Framework Programme (MEST-CT-2005-020621).
dc.description.statusPeer reviewed
dc.format.extent12
dc.identifier.citationGarcia-Alonso , D , Parco , M , Stokes , J & Looney , L 2012 , ' Low-energy plasma spray (LEPS) deposition of hydroxyapatite/poly-ε- caprolactone biocomposite coatings ' , Journal of Thermal Spray Technology , vol. 21 , no. 1 , pp. 132-143 . https://doi.org/10.1007/s11666-011-9695-0
dc.identifier.doi10.1007/s11666-011-9695-0
dc.identifier.issn1059-9630
dc.identifier.urihttps://hdl.handle.net/11556/3313
dc.identifier.urlhttp://www.scopus.com/inward/record.url?scp=84855707913&partnerID=8YFLogxK
dc.language.isoeng
dc.relation.ispartofJournal of Thermal Spray Technology
dc.relation.projectIDEuropean Community®s Sixth Framework Programme, MEST-CT-2005-020621
dc.relation.projectIDMarie Curie Early Stage Research
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.subject.keywordsbiocomposite coatings
dc.subject.keywordscell attachment
dc.subject.keywordshydroxyapatite
dc.subject.keywordsplasma spraying
dc.subject.keywordspoly-ε-caprolactone
dc.subject.keywordsstatistical design of experiments
dc.subject.keywordsCondensed Matter Physics
dc.subject.keywordsSurfaces, Coatings and Films
dc.subject.keywordsMaterials Chemistry
dc.titleLow-energy plasma spray (LEPS) deposition of hydroxyapatite/poly-ε- caprolactone biocomposite coatingsen
dc.typejournal article
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