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Biodegradability engineering of biodegradable Mg alloys: tailoring the electrochemical properties and microstructure of constituent phases.


ABSTRACT: Crystalline Mg-based alloys with a distinct reduction in hydrogen evolution were prepared through both electrochemical and microstructural engineering of the constituent phases. The addition of Zn to Mg-Ca alloy modified the corrosion potentials of two constituent phases (Mg + Mg2Ca), which prevented the formation of a galvanic circuit and achieved a comparable corrosion rate to high purity Mg. Furthermore, effective grain refinement induced by the extrusion allowed the achievement of much lower corrosion rate than high purity Mg. Animal studies confirmed the large reduction in hydrogen evolution and revealed good tissue compatibility with increased bone deposition around the newly developed Mg alloy implants. Thus, high strength Mg-Ca-Zn alloys with medically acceptable corrosion rate were developed and showed great potential for use in a new generation of biodegradable implants.

SUBMITTER: Cha PR 

PROVIDER: S-EPMC3734439 | biostudies-literature | 2013

REPOSITORIES: biostudies-literature

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Biodegradability engineering of biodegradable Mg alloys: tailoring the electrochemical properties and microstructure of constituent phases.

Cha Pil-Ryung PR   Han Hyung-Seop HS   Yang Gui-Fu GF   Kim Yu-Chan YC   Hong Ki-Ha KH   Lee Seung-Cheol SC   Jung Jae-Young JY   Ahn Jae-Pyeong JP   Kim Young-Yul YY   Cho Sung-Youn SY   Byun Ji Young JY   Lee Kang-Sik KS   Yang Seok-Jo SJ   Seok Hyun-Kwang HK  

Scientific reports 20130101


Crystalline Mg-based alloys with a distinct reduction in hydrogen evolution were prepared through both electrochemical and microstructural engineering of the constituent phases. The addition of Zn to Mg-Ca alloy modified the corrosion potentials of two constituent phases (Mg + Mg2Ca), which prevented the formation of a galvanic circuit and achieved a comparable corrosion rate to high purity Mg. Furthermore, effective grain refinement induced by the extrusion allowed the achievement of much lower  ...[more]

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