2026年1月9日、Dr. Maria Wątroba (Empa) によるご講演が第185回構材ゼミとして開催されます。
日時：2026年1月9日（金曜日）10：30-11：15
場所：NIMS千現地区 先進構造材料研究棟2階213室
講演題目：Microscale Additive Manufacturing of Zinc Architectures: From Microstructure Control to Mechanical Performance
講演者：Dr. Maria Wątroba, a postdoctoral researcher at Empa - Swiss Federal Laboratories for Materials Science and Technology,
JSPS Postdoctoral Fellowship Program (Short-Term) for North American and European Researchers
開催者： Thomas E. J. Edwards, Mechanical Properties Group
Abstract:
Biomedical implants benefit from surface designs that promote favorable mechanical performance
while promoting cell attachment and reducing bacterial infections. Electrochemical fabrication
provides a versatile pathway to tailor both microstructure and geometry, which are key factors
governing the mechanical and biological performance of metallic materials at small length scales.
This work demonstrates systematic progression from two-dimensional electrodeposited zinc
coatings to three-dimensional zinc micro-architectures fabricated using lithography-assisted
electrochemical microfabrication. Zinc is an attractive material for biomedical applications due to its
biocompatibility, antibacterial activity, and controlled biodegradation; however, its limited
mechanical strength necessitates careful microstructural control, particularly at the microscale.
Comprehensive microstructural characterization combined with micromechanical testing establishes
fundamental structure-property relationships in electrodeposited zinc coatings. Focused ion beam–
milled (FIB) micropillars testing combined with microstructural characterization via electron
backscatter diffraction (EBSD) and transmission electron microscopy (TEM), reveal how
electrodeposition parameters influence grain morphology, texture, and deformation behavior,
including zinc’s characteristic inverse Hall–Petch relation upon grain refinement. These insights are
extended to three-dimensional zinc micropillars and microlattice structures, enabling the parallel
fabrication and mechanical testing of multiple microscale specimens. Mechanical testing indicates
that the fundamental deformation mechanisms observed in planar coatings are largely preserved in
three-dimensional architectures.
Overall, this study highlights electrochemical microfabrication as a robust platform for designing
zinc-based micro-architectures with tunable mechanical performance, providing a foundation for
future simulation-assisted development of materials for biomedical applications.