In Situ Synchrotron X-Ray Diffraction Characterization of Corrosion Products of a Ti-Based Metallic Glass for Implant Applications

Petre Flaviu Gostin*, Owen Addison, Alexander P. Morrell, Yue Zhang, Angus J.M.C. Cook, Alethea Liens, Mihai Stoica, Konstantin Ignatyev, Steven R. Street, Jing Wu, Yu Lung Chiu, Alison J. Davenport

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

Ti-based bulk metallic glasses are under consideration for implants due to their high yield strength and biocompatibility. In this work, in situ synchrotron X-ray diffraction (XRD) is used to investigate the corrosion products formed from corrosion of Ti40Zr10Cu34Pd14Sn2 bulk metallic glass in artificial corrosion pits in physiological saline (NaCl). It is found that Pd nanoparticles form in the interior of the pits during electrochemical dissolution. At a low pit growth potential, the change in lattice parameter of the Pd nanoparticles is consistent with the formation of palladium hydride. In addition, a salt layer very close to the dissolving interface is found to contain CuCl, PdCl2, ZrOCl2∙8H2O, Cu, Cu2O, and several unidentified phases. The formation of Pd nanoparticles (16 ± 10 nm at 0.7 V vs Ag/AgCl) containing small amounts of the other alloying elements is confirmed by transmission electron microscopy. The addition of albumin and/or H2O2 does not significantly influence the nature of the corrosion products. When considering the biological compatibility of the alloy, the biological reactivity of the corrosion products identified should be explored.

Original languageEnglish
JournalAdvanced Healthcare Materials
Early online date16 Sep 2018
DOIs
Publication statusE-pub ahead of print - 16 Sep 2018

Keywords

  • artificial pits
  • bulk metallic glasses
  • corrosion
  • in situ synchrotron X-ray diffraction
  • metallic biomaterials

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    Gostin, P. F., Addison, O., Morrell, A. P., Zhang, Y., Cook, A. J. M. C., Liens, A., Stoica, M., Ignatyev, K., Street, S. R., Wu, J., Chiu, Y. L., & Davenport, A. J. (2018). In Situ Synchrotron X-Ray Diffraction Characterization of Corrosion Products of a Ti-Based Metallic Glass for Implant Applications. Advanced Healthcare Materials. https://doi.org/10.1002/adhm.201800338