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Fabrication of Mechanically Tunable and Bioactive Metal Scaffolds for Biomedical Applications
Published on: December 8, 2015
Si-modified beta-Ti-25Mo biomaterials with reduced elastic modulus, enhanced corrosion resistance, and
Krishan Kumar1, Mohit Kamboj2, Bodhisatwa Das2
1Department of Metallurgical and Materials Engineering, Indian Institute of Technology Ropar, Rupnagar, Punjab 140001, India.
Biomedical Physics & Engineering Express
|July 7, 2026
Summary
New Ti-Mo-Si alloys offer a promising balance of low elastic modulus, high corrosion resistance, and cytocompatibility for biomedical applications. These advanced materials show potential for load-bearing implants.
Area of Science:
- Biomaterials Science
- Materials Engineering
- Metallurgical Science
Background:
- Titanium (Ti) alloys are crucial for biomedical applications, but achieving optimal properties like low elastic modulus, high corrosion resistance, and cytocompatibility remains a challenge.
- β-Titanium alloys are particularly attractive for load-bearing implants due to their mechanical properties, but further optimization is needed.
Purpose of the Study:
- To design and investigate novel Ti-Mo-Si alloys with a metastable β-phase for biomedical applications.
- To evaluate the microstructure, mechanical properties, corrosion resistance, and cytocompatibility of Ti-Mo-Si alloys with varying silicon content.
Main Methods:
- Alloys were fabricated using vacuum arc melting (VAM).
- Microstructure and phases were analyzed using optical microscopy and X-ray diffraction (XRD).
- Mechanical properties (elastic modulus, hardness) were assessed via nanoindentation; corrosion resistance was evaluated electrochemically; in vitro cytocompatibility was determined using MTT and live/dead cell assays with MC3T3-E1 cells.
Main Results:
- All Ti-Mo-Si alloys exhibited an equiaxed β-Ti microstructure, with silicide precipitates observed at grain boundaries in alloys with 1.5 and 2 wt.% Si.
- XRD confirmed a stable β-phase across all compositions.
- Nanoindentation revealed a reduced elastic modulus of 80-85 GPa and enhanced hardness up to approximately 4 GPa.
- Electrochemical studies indicated improved corrosion resistance, attributed to passive film formation with silicon addition.
- In vitro cell studies confirmed excellent cytocompatibility for all alloy compositions.
Conclusions:
- Ti-Mo-Si alloys with controlled silicon content demonstrate a favorable combination of low elastic modulus, enhanced hardness, good corrosion resistance, and cytocompatibility.
- These findings highlight the significant potential of Ti-Mo-Si alloys as advanced materials for load-bearing biomedical implants.
