Surface analysis and biocorrosion properties of nanostructured surface sol-gel coatings on Ti6Al4V titanium alloy implants

Maria C. Advincula, Don Petersen, Firoz Rahemtulla, Rigoberto Advincula, Jack E. Lemons

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

Surfaces of biocompatible alloys used as implants play a significant role in their osseointegration. Surface sol-gel processing (SSP), a variant of the bulk sol-gel technique, is a relatively new process to prepare bioreactive nanostructured titanium oxide for thin film coatings. The surface topography, roughness, and composition of sol-gel processed Ti6A14V titanium alloy coatings was investigated by atomic force microscopy (AFM) and X-ray electron spectroscopy (XPS). This was correlated with corrosion properties, adhesive strength, and bioreactivity in simulated body fluids (SBF). Electroimpedance spectroscopy (EIS) and polarization studies indicated similar advantageous corrosion properties between sol-gel coated and uncoated Ti6A14V, which was attributed to the stable TiO2 composition, topography, and adhesive strength of the sol-gel coating. In addition, inductive coupled plasma (ICP) and scanning electron microscopy with energy dispersive spectrometry (SEM-EDS) analysis of substrates immersed in SBF revealed higher deposition of calcium and phosphate and low release rates of alloying elements from the sol-gel modified alloys. The equivalent corrosion behavior and the definite increase in nucleation of calcium apatite indicate the potential of the sol-gel coating for enhanced bioimplant applications.

Original languageEnglish
Pages (from-to)107-120
Number of pages14
JournalJournal of Biomedical Materials Research - Part B Applied Biomaterials
Volume80
Issue number1
DOIs
Publication statusPublished - 2007 Jan
Externally publishedYes

Keywords

  • AFM
  • Biocorrosion
  • Coatings
  • Sol-gel
  • Titanium alloys
  • XPS

ASJC Scopus subject areas

  • Biomedical Engineering
  • Biomaterials

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