Microstructure and degradation performance of biodegradable Mg-Si-Sr implant alloys
| Autor: | Iñigo Marco, Norbert Hort, Andrea Gil-Santos, Omer Van der Biest, Nele Moelans |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Silicon
Materials science Physiological degradation Corrosion layer Intermetallics Impurities 0206 medical engineering Alloy Intermetallic Bioengineering 02 engineering and technology engineering.material Alloy composition Biomaterials Engineering Impurity Phase (matter) Absorbable Implants Alloys Magnesium Microstructure ddc:620.11 Metallurgy 021001 nanoscience & nanotechnology 020601 biomedical engineering Mechanics of Materials Strontium Magnesium alloys engineering Degradation (geology) 0210 nano-technology Ternary operation |
| Zdroj: | Gil-Santos, A.; Marco, I.; Moelans, N.; Hort, N.; Biest, O.van der: Microstructure and degradation performance of biodegradable Mg-Si-Sr implant alloys. In: Materials Science and Engineering C. Vol. 71 (2017) 25-34. (DOI: 10.1016/j.msec.2016.09.056) Gil-Santos, A, Marco, I, Moelans, N, Hort, N & Van der Biest, O 2017, ' Microstructure and degradation performance of biodegradable Mg-Si-Sr implant alloys ', Materials Science and Engineering C, vol. 71, pp. 25-34 . https://doi.org/10.1016/j.msec.2016.09.056 |
| ISSN: | 0928-4931 |
| DOI: | 10.1016/j.msec.2016.09.056) |
| Popis: | In this work the microstructure and degradation behavior of several as-cast alloy compositions belonging to the Mg rich corner of the Mg-Si-Sr system are presented and related. The intermetallic phases are identified and analyzed describing the microstructure evolution during solidification. It is intended in this work to obtain insight in the behavior of the ternary alloys in in vitro tests and to analyze the degradation behavior of the alloys under physiologically relevant conditions. The as-cast specimens have been exposed to immersion tests, both mass loss (ML) and potentiodynamic polarization (PDP). The degradation rate (DR) have been assessed and correlated to microstructure features, impurity levels and alloy composition. The initial reactions resulted to be more severe while the degradation stabilizes with time. A higher DR is related with a high content of the Mg17Sr2 phase and with the presence of coarse particles of the intermetallics Mg2Si, MgSiSr and MgSi2Sr. Specimens with a higher DR typically have higher levels of impurities and alloy contents. publisher: Elsevier articletitle: Microstructure and degradation performance of biodegradable Mg-Si-Sr implant alloys journaltitle: Materials Science and Engineering: C articlelink: http://dx.doi.org/10.1016/j.msec.2016.09.056 content_type: article copyright: © 2016 Elsevier B.V. All rights reserved. ispartof: Materials Science & Engineering C-Materials for Biological Applications vol:71 pages:25-34 ispartof: location:Netherlands status: published |
| Databáze: | OpenAIRE |
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