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Characterization and Applications of Bio-Metallic Materials, Bio-Alloys, and Bio-Active Coatings

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Biomaterials".

Deadline for manuscript submissions: 20 September 2025 | Viewed by 1578

Special Issue Editor


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Guest Editor
State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Interests: biodegradable metal materials; microstructures; properties; biodegradable coatings; numerical simulation; deformation; sintering; bio-porous materials; surface modification; bio-active composites; bio-alloys; biocompatibility; antimicrobial surfaces; surface bioactivity
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Special Issue Information

Dear Colleagues,

Biodegradable metal materials are widely used in biomedical devices and biological implant materials, and are potentially important basic key medical functional materials. In addition to their desirable mechanical properties, biomedical metals also require unique biocompatibility and biodegradability characteristics. Moreover, the application of biomedical metals also depends on their formability through processing, such as improved deformability, spray coating ability, metal powder formability, sintering characteristics and liquid metal processing, in order to prepare deformable and flexible medical instruments, various types of biological coatings, porous biological structural units, and various types of complex liquid forming parts. Therefore, the design and preparation of biodegradable metal materials with enhanced performance is essential for improving medical devices and clinical treatment.

This Special Issue focuses on deformation processing; the microstructures of biomedical metals, bio-metal coatings, and medical nano-coatings; biomedical metal powder preparation; bio-porous structures; and the related microstructures and mechanical properties of biodegradable metals obtained through casting, welding and other forming methods. In addition, the scope of also extends to the bionic design, numerical simulation and unit structure simulation optimization of various biodegradable metal materials. This Special Issue covers the preparation, performance characterization, microstructure simulation, special coating properties and applications of nanomaterials and relevant biodegradable metal materials. Scholars working in the field of biomedical metal materials are welcome to contribute their work in order to promote broad development and technological progress in this field.

Dr. Shengqiang Ma
Guest Editor

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Keywords

  • biodegradable metal materials
  • microstructures
  • properties
  • biodegradable coatings
  • numerical simulation
  • deformation
  • sintering
  • bio-porous materials

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Published Papers (1 paper)

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Research

35 pages, 18383 KiB  
Article
Optimising β-Ti21S Alloy Lattice Structures for Enhanced Femoral Implants: A Study on Mechanical and Biological Performance
by Lorena Emanuelli, Melika Babaei, Raffaele De Biasi, Anton du Plessis, Andrea Trivisonno, Francesca Agostinacchio, Antonella Motta, Matteo Benedetti and Massimo Pellizzari
Materials 2025, 18(1), 170; https://doi.org/10.3390/ma18010170 - 3 Jan 2025
Cited by 1 | Viewed by 1230
Abstract
The metastable β-Ti21S alloy exhibits a lower elastic modulus than Ti-6Al-4V ELI while maintaining high mechanical strength and ductility. To address stress shielding, this study explores the integration of lattice structures within prosthetics, which is made possible through additive manufacturing. Continuous adhesion between [...] Read more.
The metastable β-Ti21S alloy exhibits a lower elastic modulus than Ti-6Al-4V ELI while maintaining high mechanical strength and ductility. To address stress shielding, this study explores the integration of lattice structures within prosthetics, which is made possible through additive manufacturing. Continuous adhesion between the implant and bone is essential; therefore, auxetic bow-tie structures with a negative Poisson’s ratio are proposed for regions under tensile stress, while Triply Periodic Minimal Surface (TPMS) structures with a positive Poisson’s ratio are recommended for areas under compressive stress. This research examines the manufacturability and quasi-static mechanical behaviour of two auxetic bow-tie (AUX 2.5 and AUX 3.5) and two TPMS structures (TPMS 2.5 and TPMS 1.5) in β-Ti21S alloy produced via laser powder bed fusion. Micro-CT reveals printability issues in TPMS 1.5, affecting pore size and reducing fatigue resistance compared to TPMS 2.5. AUX 3.5’s low stiffness matches cancellous bone but shows insufficient yield strength and fatigue resistance for femoral implants. Biological tests confirm non-toxicity and enhanced cell activity in β-Ti21S structures. The study concludes that the β-Ti21S alloy, especially with TPMS 2.5 structures, demonstrates promising mechanical and biological properties for femoral implants. However, challenges like poor printability in TPMS 1.5 are acknowledged and should be addressed in future research. Full article
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