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• W3089498111 abstract "Zinc (Zn) and its alloys are receiving great attention as promising biodegradable materials due to their suitable corrosion resistance, good biocompatibility, and highly desirable biofunctionality. Nevertheless, the low mechanical strength of pure Zn impedes its practical clinical application and there have been calls for further research into the Zn alloys and thermomechanical processes to enhance their mechanical properties and biocompatibility. Here, we report on the alloying efficacy of rare earth elements (REEs) including erbium (Er), dysprosium (Dy), and holmium (Ho) on the microstructure, mechanical properties, corrosion and wear behavior, and in vitro biological properties of Zn–1Mg–0.1RE alloys. Microstructural characterization revealed that the addition of 0.1 wt.% REEs had a significant refining effect on the grain size of the α–Zn matrix and the second phases of the alloys. Alloying of the REEs and hot-rolling effectively improved the mechanical properties due to both precipitation strengthening of the second phases of ErZn5, DyZn5, and Ho2Zn17 and grain-refinement strengthening. The highest ultimate tensile strength of 259.4 MPa and yield strength of 234.8 MPa with elongation of 16.8% were achieved in the hot-rolled Zn–1Mg–0.1Ho. Alloying of REEs also improved the wear and corrosion resistance, and slowed down the degradation rate in Hanks’ solution. Zn–1Mg–0.1Er showed the highest cytocompatibility of MC3T3-E1 cells cultured directly on the alloy surface and of MG-63 cells cultured in the alloy extract. Zn–1Mg–0.1Dy showed the best anticoagulant property among all the alloys. Overall, these Zn–1Mg–0.1RE (Er, Dy, and Ho) alloys can be considered promising biodegradable metallic materials for orthopedic applications." @default.
• W3089498111 created "2020-10-08" @default.
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• W3089498111 date "2020-11-01" @default.
• W3089498111 modified "2023-10-16" @default.
• W3089498111 title "Development of biodegradable Zn–1Mg–0.1RE (RE = Er, Dy, and Ho) alloys for biomedical applications" @default.
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• W3089498111 doi "https://doi.org/10.1016/j.actbio.2020.09.036" @default.
• W3089498111 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/33007488" @default.
• W3089498111 hasPublicationYear "2020" @default.
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