Evaluation of mechanical properties and biological response of an alumina-forming Ni-free ferritic alloy

González-Carrasco, José Luis; Ciapetti, G.; Montealegre, M. A.; Pagani, Stefania; Chao, Jesús; Baldini, Nicola

doi:10.1016/j.biomaterials.2004.09.058

Cited by 25 publications

(17 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This alloy can be used for tubing in a combined cycle gas turbine heat exchanger in a biomass power plant [1,2]. Recently, the alloy has been investigated as potential biomaterial for surgical implants [3]. For this application, a fine, dense and tightly adherent ␣-alumina layer is formed on the surface by thermal oxidation at high temperature (pre-oxidation temperature of 1100 • C).…”

Section: Introductionmentioning

confidence: 99%

Phase separation in PM 2000™ Fe-base ODS alloy: Experimental study at the atomic level

Capdevila

Miller

Russell

et al. 2008

Materials Science and Engineering: A

Self Cite

View full text Add to dashboard Cite

The coarsening of the three-dimensional microstructure resulting from phase separation during ageing at 748 K of a Fe-based PM 2000 TM oxide dispersion strengthened (ODS) steel has been investigated by atom probe tomography and hardness measurements. Phase separation resulted in the formation of isolated particles of the chromium-enriched ␣ phase. The aluminum and titanium were found to preferential partition to the iron-rich ␣ phase. The partitioning of aluminum is consistent with theoretical calculations. The change in the scale of the chromium-enriched ␣ phase was found to fit a power law with a time exponent of 0.32 in accordance with that predicted by the classical Lifshitz, Slyozov and Wagner (LSW) theory. The solute concentrations of the coexisting ␣ and ␣ phases were estimated from concentration frequency distributions with the Langer-Bar-on-Miller (LBM) method and proximity histograms. The hardness was linearly related to the chromium content of the ␣ phase.

show abstract

Section: Introductionmentioning

confidence: 99%

Phase separation in PM 2000™ Fe-base ODS alloy: Experimental study at the atomic level

Capdevila

Miller

Russell

et al. 2008

Materials Science and Engineering: A

Self Cite

View full text Add to dashboard Cite

show abstract

“…[5] Highly protective Al-and Si-containing oxides play an important role also in such applications, since they can prevent harmful release of metal cations (especially Ni) to nearby tissues. [6,7] For these reasons, a detailed understanding of the formation and modification of nanoscale surface oxides is required in order to develop the surface properties of stainless steel materials.…”

Section: Introductionmentioning

confidence: 99%

Influence of minor alloying elements on the initial stages of oxidation of austenitic stainless steel materials

Jussila

Lahtonen

Lampimäki

et al. 2008

Surface & Interface Analysis

View full text Add to dashboard Cite

Surface oxidation of Fe-19Cr-17Ni, Fe-19Cr-18Ni-1Al and TiC-enriched Fe-19Cr-18Ni-1Al alloys was investigated by photoelectron spectroscopy (PES). The experiments were conducted at 323 K in pure O 2 (2.7 × 10 −6 mbar). Composition and morphology of the nanoscale surface oxides were determined quantitatively by inelastic electron background analysis. Moreover, use of synchrotron radiation facilities were necessary to obtain improved sensitivity for studying minor alloying elements such as Al and Si. The results indicate oxygen-induced segregation of Al, which significantly hinders the oxidation of the major alloying elements Fe and Cr. Ti remains in its inert carbide form. The relative concentration of Fe within the oxide layer was found to increase with the oxide-layer thickness, indicating greater mobility of Fe relative to other alloying elements.

show abstract

“…Methods used for cell viability, growth, ALP, and morphology have been detailed previously. 12 Release of Al and Cr ions was measured by using a graphite furnace atomic absorption spectrometer (GFAAS), equipped with double background correction Deuterium/Zeeman, autosampler and pyrolytic carbon-coated graphite tubes (Unicam Model Solaar 939 QZ, Cambridge, UK). Calibration was performed by applying the Standard Addition Method, and using certified standard solutions at three concentrations for each element (NIST).…”

Section: In Vitro Testsmentioning

confidence: 99%

Potential of FeAlCr intermetallics reinforced with nanoparticles as new biomaterials for medical devices

et al. 2006

Self Cite

View full text Add to dashboard Cite

Novel FeAlCr oxide dispersion strengthened intermetallics that are processed by powder metallurgy have been developed as potential biomaterials. The alloys exhibit a small grain size and a fine dispersion of yttria provides the material with a high yield strength and depending on the alloy composition good ductility (up to 5%). The biocompatibility of the alloy was assessed in comparison with commercial alumina. Saos-2 osteoblast-like cells were either challenged with mechanically alloyed particles, or seeded onto solid samples. Viability and proliferation of cells were substantially unaffected by the presence of a high concentration of particles (1 mg/mL). Solid samples of novel FeAlCr intermetallic have shown a good biocompatibility in vitro, often approaching the behavior of materials well known for their biological acceptance (e.g. alumina). It has been found that osteoblasts are able to produce ALP, a specific marker of cells with bone-forming activity. In this respect, ALUSI alloys hold the promise to be suitable substrate for bone integration. The finding of no cytotoxic effect in the presence of the alloy particles is a reliable proof of the absence of acute toxicity of the material.

show abstract

Evaluation of mechanical properties and biological response of an alumina-forming Ni-free ferritic alloy

Cited by 25 publications

References 28 publications

Phase separation in PM 2000™ Fe-base ODS alloy: Experimental study at the atomic level

Phase separation in PM 2000™ Fe-base ODS alloy: Experimental study at the atomic level

Influence of minor alloying elements on the initial stages of oxidation of austenitic stainless steel materials

Potential of FeAlCr intermetallics reinforced with nanoparticles as new biomaterials for medical devices

Contact Info

Product

Resources

About