TY - JOUR
T1 - In situ synchrotron X-ray diffraction characterization of corrosion products of a Ti-based metallic glass for implant applications
AU - Gostin, Petre Flaviu
AU - Addison, Owen
AU - Morrell, Alexander P
AU - Zhang, Yue
AU - Cook, Angus J M C
AU - Liens, Alethea
AU - Stoica, Mihai
AU - Ignatyev, Konstantin
AU - Street, Steven R
AU - Wu, Jing
AU - Chiu, Yu-Lung
AU - Davenport, Alison J
N1 - © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
PY - 2018/11/7
Y1 - 2018/11/7
N2 - 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 Ti40 Zr10 Cu34 Pd14 Sn2 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.
AB - 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 Ti40 Zr10 Cu34 Pd14 Sn2 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.
KW - artificial pits
KW - bulk metallic glasses
KW - corrosion
KW - in situ synchrotron X‐ray diffraction
KW - metallic biomaterials
U2 - 10.1002/adhm.201800338
DO - 10.1002/adhm.201800338
M3 - Article
C2 - 30221474
SN - 2192-2640
VL - 7
JO - Advanced Healthcare Materials
JF - Advanced Healthcare Materials
IS - 21
M1 - e1800338
ER -