Biocorrosion behavior of hydroxyapatite/bioactive glass plasma sprayed on Ti6A14V

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Abstract

Biocorrosion behavior and changes in morphology and phases of hydroxyapatite (HA), bioactive glass (BG) and HA/BG coatings in Hank's physiological solution is investigated. Results showed that as-coated BG had the roughest surface, while as-coated HA had the smoothest surface. The HA/BG coating was comprised of both bubble-shaped particles of BG and small irregular-shaped particles of HA. Low intensity X-ray diffraction (XRD) peaks of CaO, β-TCP and Ca4P2O5, besides the major apatite peaks, were observed in HA and HA/ BG coatings. BG coating had an essentially amorphous structure. When HA and HA/BG were immersed in Hank's solution for 30 days, most of the minor phases dissolved. When BG coating was immersed, both apatite and SiO2 peaks gradually rose. A sudden drop and recovery in OCP occurred to BG and HA/BG but not to HA. Anodic polarization showed that passivation and film breakdown occurred to all three coatings. Passivation started approximately from 200, 300 and 400 mV(SCE) for HA, HA/BG and BG coatings, respectively. The three coatings had similar critical current densities. The released calcium ion concentration was found the highest in HA-tested solution, while the concentrations of sodium and silicon were the highest in BG-tested solution. The drop-and-rise phenomenon was also observed in the FT-IR spectra of immersed HA and HA/BG coating. These FT-IR results are consistent with the XRD results reported earlier.

Original languageEnglish
Pages (from-to)282-289
Number of pages8
JournalMaterials Chemistry & Physics
Volume41
Issue number4
DOIs
Publication statusPublished - 1995 Jan 1

Fingerprint

Bioactive glass
Durapatite
activity (biology)
Hydroxyapatite
Plasmas
glass coatings
glass
Coatings
Apatites
apatites
Apatite
passivity
Passivation
coatings
X ray diffraction
Anodic polarization
ion concentration
Silicon
diffraction

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

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abstract = "Biocorrosion behavior and changes in morphology and phases of hydroxyapatite (HA), bioactive glass (BG) and HA/BG coatings in Hank's physiological solution is investigated. Results showed that as-coated BG had the roughest surface, while as-coated HA had the smoothest surface. The HA/BG coating was comprised of both bubble-shaped particles of BG and small irregular-shaped particles of HA. Low intensity X-ray diffraction (XRD) peaks of CaO, β-TCP and Ca4P2O5, besides the major apatite peaks, were observed in HA and HA/ BG coatings. BG coating had an essentially amorphous structure. When HA and HA/BG were immersed in Hank's solution for 30 days, most of the minor phases dissolved. When BG coating was immersed, both apatite and SiO2 peaks gradually rose. A sudden drop and recovery in OCP occurred to BG and HA/BG but not to HA. Anodic polarization showed that passivation and film breakdown occurred to all three coatings. Passivation started approximately from 200, 300 and 400 mV(SCE) for HA, HA/BG and BG coatings, respectively. The three coatings had similar critical current densities. The released calcium ion concentration was found the highest in HA-tested solution, while the concentrations of sodium and silicon were the highest in BG-tested solution. The drop-and-rise phenomenon was also observed in the FT-IR spectra of immersed HA and HA/BG coating. These FT-IR results are consistent with the XRD results reported earlier.",
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Biocorrosion behavior of hydroxyapatite/bioactive glass plasma sprayed on Ti6A14V. / Chern, Jiin-Huey; Chen, K. S.; Ju, Chien-Ping.

In: Materials Chemistry & Physics, Vol. 41, No. 4, 01.01.1995, p. 282-289.

Research output: Contribution to journalArticle

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AB - Biocorrosion behavior and changes in morphology and phases of hydroxyapatite (HA), bioactive glass (BG) and HA/BG coatings in Hank's physiological solution is investigated. Results showed that as-coated BG had the roughest surface, while as-coated HA had the smoothest surface. The HA/BG coating was comprised of both bubble-shaped particles of BG and small irregular-shaped particles of HA. Low intensity X-ray diffraction (XRD) peaks of CaO, β-TCP and Ca4P2O5, besides the major apatite peaks, were observed in HA and HA/ BG coatings. BG coating had an essentially amorphous structure. When HA and HA/BG were immersed in Hank's solution for 30 days, most of the minor phases dissolved. When BG coating was immersed, both apatite and SiO2 peaks gradually rose. A sudden drop and recovery in OCP occurred to BG and HA/BG but not to HA. Anodic polarization showed that passivation and film breakdown occurred to all three coatings. Passivation started approximately from 200, 300 and 400 mV(SCE) for HA, HA/BG and BG coatings, respectively. The three coatings had similar critical current densities. The released calcium ion concentration was found the highest in HA-tested solution, while the concentrations of sodium and silicon were the highest in BG-tested solution. The drop-and-rise phenomenon was also observed in the FT-IR spectra of immersed HA and HA/BG coating. These FT-IR results are consistent with the XRD results reported earlier.

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