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Phase-separated Zr70-xAl12.5Fe17.5Yx (x = 0–25 at.%) metallic glasses with suitable mechanical properties for possible implant applications

Singh, Devinder ; Ramasamy, Parthiban ; Jelinek, Anna Sophie ; Maier-Kiener, Verena ; Bhattacharya, Rahul LU ; Chen, Zhuo ; Sharifikolouei, Elham ; Scalia, Alessandro Calogero ; Najmi, Ziba and Cochis, Andrea , et al. (2025) In Journal of Materials Research and Technology 35. p.6468-6484
Abstract

Phase separation arises from the substitution of Y in Zr70-xAl12.5Fe17.5Yx (x = 0–25 at.%) metallic glasses (MGs), resulting in the formation of nano-amorphous domains within a glassy matrix. The glasses with x ≥ 10 show a typical liquid phase separation-induced two-glassy phase (Zr-rich and Y-rich) morphology with droplet-like microstructures (nano-amorphous domains). The size of the domains increases with increasing Y addition. Atom probe tomography (APT) analysis confirms the formation of nanometer-sized Y-enriched clusters for x = 15 and 20. The effect of microstructural variation due to phase separation on the mechanical properties was studied using micro- and nano-indentation techniques.... (More)

Phase separation arises from the substitution of Y in Zr70-xAl12.5Fe17.5Yx (x = 0–25 at.%) metallic glasses (MGs), resulting in the formation of nano-amorphous domains within a glassy matrix. The glasses with x ≥ 10 show a typical liquid phase separation-induced two-glassy phase (Zr-rich and Y-rich) morphology with droplet-like microstructures (nano-amorphous domains). The size of the domains increases with increasing Y addition. Atom probe tomography (APT) analysis confirms the formation of nanometer-sized Y-enriched clusters for x = 15 and 20. The effect of microstructural variation due to phase separation on the mechanical properties was studied using micro- and nano-indentation techniques. The micro-hardness and nano-hardness are found to be in the range of 4.58–5.73 GPa and 5.22–6.11 GPa for the alloys with x = 0–25. The hardness and elastic modulus decrease gradually with the increase in Y content. The Zr-based MGs exhibit Young's moduli in the range of 81–91 GPa, which are lower than that of Co–Cr–Mo, 316L SS and Ti–6Al–4V commercial implant alloys. Evaluation of the cytocompatibility of the MG ribbons reveals high metabolic activity and well-spread human gingival fibroblast (HGF) cells on the surface of x = 10 and 15 samples. Thus, the two glassy-phase Zr-based MGs free of toxic elements (Ni and Cu) exhibit suitable mechanical properties and biocompatibility, making them strong contenders for use in implant applications.

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publishing date
type
Contribution to journal
publication status
published
subject
keywords
Cytocompatibility, Mechanical properties, Metallic glasses, Microstructure, Nano-amorphous domain, Phase separation, Zr-alloys
in
Journal of Materials Research and Technology
volume
35
pages
17 pages
publisher
Elsevier
external identifiers
  • scopus:85219494269
ISSN
2238-7854
DOI
10.1016/j.jmrt.2025.02.252
language
English
LU publication?
no
id
27083ab3-71ad-4884-9fa2-eab5d86a5a24
date added to LUP
2025-08-28 21:10:18
date last changed
2025-09-22 12:07:34
@article{27083ab3-71ad-4884-9fa2-eab5d86a5a24,
  abstract     = {{<p>Phase separation arises from the substitution of Y in Zr<sub>70-x</sub>Al<sub>12.5</sub>Fe<sub>17.5</sub>Y<sub>x</sub> (x = 0–25 at.%) metallic glasses (MGs), resulting in the formation of nano-amorphous domains within a glassy matrix. The glasses with x ≥ 10 show a typical liquid phase separation-induced two-glassy phase (Zr-rich and Y-rich) morphology with droplet-like microstructures (nano-amorphous domains). The size of the domains increases with increasing Y addition. Atom probe tomography (APT) analysis confirms the formation of nanometer-sized Y-enriched clusters for x = 15 and 20. The effect of microstructural variation due to phase separation on the mechanical properties was studied using micro- and nano-indentation techniques. The micro-hardness and nano-hardness are found to be in the range of 4.58–5.73 GPa and 5.22–6.11 GPa for the alloys with x = 0–25. The hardness and elastic modulus decrease gradually with the increase in Y content. The Zr-based MGs exhibit Young's moduli in the range of 81–91 GPa, which are lower than that of Co–Cr–Mo, 316L SS and Ti–6Al–4V commercial implant alloys. Evaluation of the cytocompatibility of the MG ribbons reveals high metabolic activity and well-spread human gingival fibroblast (HGF) cells on the surface of x = 10 and 15 samples. Thus, the two glassy-phase Zr-based MGs free of toxic elements (Ni and Cu) exhibit suitable mechanical properties and biocompatibility, making them strong contenders for use in implant applications.</p>}},
  author       = {{Singh, Devinder and Ramasamy, Parthiban and Jelinek, Anna Sophie and Maier-Kiener, Verena and Bhattacharya, Rahul and Chen, Zhuo and Sharifikolouei, Elham and Scalia, Alessandro Calogero and Najmi, Ziba and Cochis, Andrea and Fellner, Simon and Yüce, Eray and Gammer, Christoph and Zhang, Zaoli and Eckert, Jürgen}},
  issn         = {{2238-7854}},
  keywords     = {{Cytocompatibility; Mechanical properties; Metallic glasses; Microstructure; Nano-amorphous domain; Phase separation; Zr-alloys}},
  language     = {{eng}},
  month        = {{03}},
  pages        = {{6468--6484}},
  publisher    = {{Elsevier}},
  series       = {{Journal of Materials Research and Technology}},
  title        = {{Phase-separated Zr<sub>70-x</sub>Al<sub>12.5</sub>Fe<sub>17.5</sub>Y<sub>x</sub> (x = 0–25 at.%) metallic glasses with suitable mechanical properties for possible implant applications}},
  url          = {{http://dx.doi.org/10.1016/j.jmrt.2025.02.252}},
  doi          = {{10.1016/j.jmrt.2025.02.252}},
  volume       = {{35}},
  year         = {{2025}},
}