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(1.4 wt%) 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 100 pm 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 +/- 30 nm due to the contribution of micrometric aggregates, while the roughness of the fine-texture particulates is approximately 47 +/- 4 nm. The results of the electrochemical corrosion evaluation tests evidence that the RKKP coating improves the corrosion resistance of the Mg-Ca (1.4 wt) alloy in Simulated Body Fluid

Glass-ceramic coated Mg-Ca alloys for biomedical implant applications

DE BONIS, ANGELA;CURCIO, MARIANGELA;TEGHIL, Roberto
2016-01-01

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(1.4 wt%) 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 100 pm 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 +/- 30 nm due to the contribution of micrometric aggregates, while the roughness of the fine-texture particulates is approximately 47 +/- 4 nm. The results of the electrochemical corrosion evaluation tests evidence that the RKKP coating improves the corrosion resistance of the Mg-Ca (1.4 wt) alloy in Simulated Body Fluid
2016
File in questo prodotto:
File Dimensione Formato  
Mg_Ca.pdf

solo utenti autorizzati

Tipologia: Documento in Post-print
Licenza: DRM non definito
Dimensione 1.83 MB
Formato Adobe PDF
1.83 MB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11563/120557
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 74
  • ???jsp.display-item.citation.isi??? 65
social impact