title: Glass-ceramic coated Mg-Ca alloys for biomedical implant applications.
abstract: Biodegradable metals and alloys are promising candidates for biomedical bone implant applications. However, due to the high rate of their biodegradation in human body environment, they should be coated with less reactive materials, such, for example, as bioactive glasses or glass-ceramics. Fort this scope, RKKP composition glass-ceramic coatings have been deposited on Mg-Ca(1.4wt%) alloy substrates by Pulsed Laser Deposition method, and their properties have been characterized by a number of techniques. The prepared coatings consist of hydroxyapatite and wollastonite phases, having composition close to that of the bulk target material used for depositions. The 100μm thick films are characterized by dense, compact and rough morphology. They are composed of a glassy matrix with various size (from micro- to nano-) granular inclusions. The average surface roughness is about 295±30nm due to the contribution of micrometric aggregates, while the roughness of the fine-texture particulates is approximately 47±4nm. The results of the electrochemical corrosion evaluation tests evidence that the RKKP coating improves the corrosion resistance of the Mg-Ca (1.4wt%) alloy in Simulated Body Fluid.
authors.affiliation: Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche, Via del Fosso del Cavaliere 100, 00133 Rome, Italy. Electronic address: giulietta.rau@ism.cnr.it.
authors.forename: J V
authors.initials: JV
authors.lastname: Rau
authors.affiliation: University Politehnica of Bucharest, Splaiul Independentei 313, sector 6, 77206, Bucharest, Romania. Electronic address: antoniac.iulian@gmail.com.
authors.forename: I
authors.initials: I
authors.lastname: Antoniac
authors.affiliation: Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche, Via del Fosso del Cavaliere 100, 00133 Rome, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Fosca
authors.affiliation: "Titu Maiorescu" University, Faculty of Medicine, Street Pictor Gheorghe Petrascu 67A, sector 3, Bucharest, Romania.
authors.forename: A
authors.initials: A
authors.lastname: De Bonis
authors.affiliation: University Politehnica of Bucharest, Splaiul Independentei 313, sector 6, 77206, Bucharest, Romania.
authors.forename: A I
authors.initials: AI
authors.lastname: Blajan
authors.affiliation: University Politehnica of Bucharest, Splaiul Independentei 313, sector 6, 77206, Bucharest, Romania.
authors.forename: C
authors.initials: C
authors.lastname: Cotrut
authors.affiliation: Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche, Via del Fosso del Cavaliere 100, 00133 Rome, Italy.
authors.forename: V
authors.initials: V
authors.lastname: Graziani
authors.affiliation: "Titu Maiorescu" University, Faculty of Medicine, Street Pictor Gheorghe Petrascu 67A, sector 3, Bucharest, Romania.
authors.forename: M
authors.initials: M
authors.lastname: Curcio
authors.affiliation: Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche, Via del Fosso del Cavaliere 100, 00133 Rome, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Cricenti
authors.affiliation: "Titu Maiorescu" University, Faculty of Medicine, Street Pictor Gheorghe Petrascu 67A, sector 3, Bucharest, Romania.
authors.forename: M
authors.initials: M
authors.lastname: Niculescu
authors.affiliation: Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche, Via del Fosso del Cavaliere 100, 00133 Rome, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Ortenzi
authors.affiliation: Dipartimento di Scienze, Università della Basilicata, Viale dell'Ateneo Lucano 10, 85100 Potenza, Italy.
authors.forename: R
authors.initials: R
authors.lastname: Teghil
mesh_terms: D000497:Alloys / Q000737:chemistry*; D018786:Bone Substitutes / Q000737:chemistry*; D002118:Calcium / Q000737:chemistry*; D002516:Ceramics / Q000737:chemistry*; D020099:Coated Materials, Biocompatible / Q000737:chemistry*; D005898:Glass / Q000737:chemistry*; D006801:Humans; D020007:Implants, Experimental; D008274:Magnesium / Q000737:chemistry*
chemical_list: D000497:Alloys; D018786:Bone Substitutes; D020099:Coated Materials, Biocompatible; D008274:Magnesium; D002118:Calcium
keywords: Coatings; Glass-ceramics; Mg-Ca alloy; Physico-chemical properties; Pulsed laser deposition