title: Improved bonding strength of bioactive cermet Cold Gas Spray coatings.
abstract: The fabrication of cermet biocompatible coatings by means Cold Gas Spray (CGS) provides prosthesis with outstanding mechanical properties and the required composition for enhancing the bioactivity of prosthetic materials. In this study, hydroxyapatite/Titanium coatings were deposited by means of CGS technology onto titanium alloy substrates with the aim of building-up well-bonded homogeneous coatings. Powders were blended in different percentages and sprayed; as long as the amount of hydroxyapatite in the feedstock increased, the quality of the coating was reduced. Besides, the relation between the particle size distribution of ceramic and metallic particles is of significant consideration. Plastic deformation of titanium particles at the impact eased the anchoring of hard hydroxyapatite particles present at the top surface of the coating, which assures the looked-for interaction with the cells. Coatings were immersed in Hank's solution for 1, 4 and 7 days; bonding strength value was above 60 MPa even after 7 days, which enhances common results of HAp coatings obtained by conventional thermal spray technologies.
authors.affiliation: Thermal Spray Centre, CPT, University of Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain. Electronic address: mgardon@cptub.eu.
authors.forename: M
authors.initials: M
authors.lastname: Gardon
authors.affiliation: Thermal Spray Centre, CPT, University of Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Concustell
authors.affiliation: Thermal Spray Centre, CPT, University of Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain.
authors.forename: S
authors.initials: S
authors.lastname: Dosta
authors.affiliation: Thermal Spray Centre, CPT, University of Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain.
authors.forename: N
authors.initials: N
authors.lastname: Cinca
authors.affiliation: Thermal Spray Centre, CPT, University of Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain.
authors.forename: I G
authors.initials: IG
authors.lastname: Cano
authors.affiliation: Thermal Spray Centre, CPT, University of Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain.
authors.forename: J M
authors.initials: JM
authors.lastname: Guilemany
mesh_terms: D000497:Alloys / Q000737:chemistry; D002516:Ceramics; D016722:Cermet Cements / Q000737:chemistry*; D020099:Coated Materials, Biocompatible / Q000737:chemistry*; D017886:Durapatite / Q000737:chemistry; D006244:Hardness; D008855:Microscopy, Electron, Scanning; D010316:Particle Size; D013718:Tensile Strength; D014025:Titanium / Q000737:chemistry
chemical_list: D000497:Alloys; D016722:Cermet Cements; D020099:Coated Materials, Biocompatible; D017886:Durapatite; D014025:Titanium
keywords: Cermet; Coating; Cold Gas Spray; Hydroxyapatite; Prosthesis; Titanium