Mechanical properties, corrosion performance and cell viability studies on newly developed porous Fe-Mn-Si-Pd alloys
| Autor: | Huiyan Zhang, Jordi Sort, Maria Dolores Baró, Jordina Fornell, Yu-ping Feng, Nerea Gaztelumendi, Carme Nogués, P. Solsona, Elena Ibáñez, Leonardo Barrios, Eva Pellicer, Santiago Suriñach |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Porous alloys Cytotoxicity Open-cell Fe-based foam Space holder Alloy Modulus Mechanical properties 02 engineering and technology engineering.material 010402 general chemistry 01 natural sciences Corrosion Biomaterials Materials Chemistry Immersion (virtual reality) Composite material Porosity Mechanical Engineering Metallurgy Metals and Alloys Biodegradation 021001 nanoscience & nanotechnology Microstructure Magnetic susceptibility 0104 chemical sciences Mechanics of Materials engineering 0210 nano-technology |
| Zdroj: | Dipòsit Digital de Documents de la UAB Universitat Autònoma de Barcelona |
| ISSN: | 0925-8388 |
| Popis: | Porous Fe-30Mn6Si1Pd (wt.%) alloys were prepared by a simple press and sinter process from ball-milled Fe, Mn, Si and Pd powders blended with 10 wt%, 20 wt% and 40 wt% NaCl to obtain different degrees of porosity. For comparison purposes, a bulk fully-compact Fe-30Mn6Si1Pd alloy was produced by arc-melting and subsequent copper-mold suction-casting. While the porous Fe-30Mn6Si1Pd alloys only consist of γ-austenite, their fully-compact counterpart comprises e-martensite and γ-austenite phases. In all cases, the low magnetic susceptibility response assures good compatibility with nuclear magnetic resonance and magnetic resonance imaging techniques. Furthermore, a reduction of the Young's modulus, from 55 to 7 GPa, was attained by introducing porosity. The biodegradation performance was evaluated by static immersion and electrochemical corrosion tests in Hank's solution. The influence of immersion time on composition, microstructure, mechanical and magnetic properties was assessed. While introducing porosity renders alloys with suitable mechanical and magnetic properties, it also has a detrimental effect in terms of cell viability. Hence, the porosity level needs to be controlled in order to obtain alloys with an optimized performance.∖ |
| Databáze: | OpenAIRE |
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