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<p>The present study investigates the Zr<sub>47</sub>Cu<sub>40</sub>Al<sub>8</sub>Ag<sub>4</sub>Dy<sub>1</sub> bulk metallic glass (BMG) as a potential biomedical implant material, analysing its structural, mechanical, and corrosion properties. The synthesized rod by copper mold suction casting exhibited a fully amorphous structure, confirmed by X-ray diffraction and high-resolution transmission electron microscopy. Nanoindentation tests showed high hardness (~ 12.78 GPa) and low&#xa0;elastic modulus (~ 88 GPa), suggesting mechanical properties comparable to human bone, which could reduce the stress shielding effect. Nanoindentation analysis also revealed significant elastic recovery (69%) and resistance to plastic deformation from shear banding, essential for maintaining structural integrity under physiological environments. Creep and viscoelastic behaviour analysis confirmed time-dependent deformation, indicating suitability for long-term use for biomedical applications. Corrosion resistance is evaluated using electrochemical polarization tests in different simulated body fluids (SBFs), including phosphate-buffered saline (PBS), artificial saliva solution (ASS), and Hank’s balanced saline solution (HBSS). PBS provided the highest corrosion resistance, while HBSS has the least corrosion resistance.</p>

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Nanoindentation and corrosion performance of Zr47Cu40Al8Ag4Dy1 bulk metallic glass for biomedical load-bearing applications

  • 期刊论文

  • 发表日期：

    2025年9月11日

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  • Juhi Verma,
  • Yogesh Prabhu,
  • Daffiny Sara Joshua,
  • S. Vincent,
  • Simran Nath,
  • R. Lakshmi Narayan,
  • Jatin Bhatt

摘要

The present study investigates the Zr47Cu40Al8Ag4Dy1 bulk metallic glass (BMG) as a potential biomedical implant material, analysing its structural, mechanical, and corrosion properties. The synthesized rod by copper mold suction casting exhibited a fully amorphous structure, confirmed by X-ray diffraction and high-resolution transmission electron microscopy. Nanoindentation tests showed high hardness (~ 12.78 GPa) and low elastic modulus (~ 88 GPa), suggesting mechanical properties comparable to human bone, which could reduce the stress shielding effect. Nanoindentation analysis also revealed significant elastic recovery (69%) and resistance to plastic deformation from shear banding, essential for maintaining structural integrity under physiological environments. Creep and viscoelastic behaviour analysis confirmed time-dependent deformation, indicating suitability for long-term use for biomedical applications. Corrosion resistance is evaluated using electrochemical polarization tests in different simulated body fluids (SBFs), including phosphate-buffered saline (PBS), artificial saliva solution (ASS), and Hank’s balanced saline solution (HBSS). PBS provided the highest corrosion resistance, while HBSS has the least corrosion resistance.