The Characterization of a Biodegradable Mg Alloy after Powder Bed Fusion with Laser Beam/Metal Processing for Custom Shaped Implants

A new Mg-Zn-Zr-Ca alloy in a powder state, intended to be used for custom shaped implants, was obtained via a mechanical alloying method from pure elemental powder. Further, the obtained powder alloy was processed by a PBF-LB/M (powder bed fusion with laser beam/of metal) procedure to obtain additiv...

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Bibliographic Details
Published in:Materials 2024-04, Vol.17 (7), p.1682
Main Authors: Raducanu, Doina, Cojocaru, Vasile Danut, Nocivin, Anna, Drob, Silviu Iulian, Hendea, Radu Emil, Stanciu, Doina, Ivanescu, Steliana, Raducanu, Vlad Andrei, Serban, Nicolae, Cojocaru, Elisabeta Mirela, Campian, Radu Septimiu
Format: Article
Language:English
Subjects:
Additive manufacturing
Agglutination
Alloying elements
Alloys
Biocompatibility
Biodegradable materials
Calcium
Chemical elements
Corrosion and anti-corrosives
Corrosion resistance
Corrosion tests
Design
Homogeneity
Laser beams
Laser fusion
Lasers
Magnesium
Magnesium alloys
Mechanical alloying
Mechanical properties
Modulus of elasticity
Porosity
Powder beds
Powders
Specialty metals industry
Transplants & implants
Zinc
Zinc compounds
Zirconium
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Summary:A new Mg-Zn-Zr-Ca alloy in a powder state, intended to be used for custom shaped implants, was obtained via a mechanical alloying method from pure elemental powder. Further, the obtained powder alloy was processed by a PBF-LB/M (powder bed fusion with laser beam/of metal) procedure to obtain additive manufactured samples for small biodegradable implants. A series of microstructural, mechanical and corrosion analyses were performed. The SEM (scanning electron microscopy) analysis of the powder alloy revealed a good dimensional homogeneity, with a uniform colour, no agglutination and almost rounded particles, suitable for the powder bed fusion procedure. Further, the PBF-LB/M samples revealed a robust and unbreakable morphology, with a suitable porosity (that can reproduce that of cortical bone) and without an undesirable balling effect. The tested Young's modulus of the PBF-LB/M samples, which was 42 GPa, is close to that of cortical bone, 30 GPa. The corrosion tests that were performed in PBS (Phosphate-buffered saline) solution, with three different pH values, show that the corrosion parameters have a satisfactory evolution comparative to the commercial ZK 60 alloy.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma17071682