50.50 FeNi permalloy with Ti and Cr additions for improved hardness and corrosion resistance

Coutu, L.; Chaput, L; Waeckerlé, Thierry

doi:10.1016/s0304-8853(00)00125-6

Cited by 21 publications

(10 citation statements)

References 1 publication

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“…Corrosion resistance remains a major limitation for medical applications if surface treatments are not considered. The saturation magnetization of iron‐nickel alloys (Fe‐47.5%Ni) reaches 1.5 T,14 and its corrosion resistance appears limited 15–17. Stainless steel 304L (SS 304L) (0.023% C; 18.22% Cr; 0.34% Si; 8.58% Ni; 1.79% Mn; 0.43% Mo) usually presents a paramagnetic behavior.…”

Section: Introductionmentioning

confidence: 99%

Moisture effect on deformability of epoxy/montmorillonite nanocomposite

Glaskova

Aniskevich

2009

J of Applied Polymer Sci

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In this article the moisture effect on deformability of epoxy/montmorillonite nanocomposite was investigated. The change of fracture character and drop of elastic characteristics due to moisture absorption was observed. The estimation of filler morphological peculiarities (platelet stack constitution) in composite and its effect on nanocomposite elastic properties was undertaken. It is shown that the higher number of filler platelet per stack consistently leads to the decrease of nanocomposite elastic properties. Nevertheless prediction by micromechanical model is rough for moistened nanocomposite because of resin structural changes.

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Section: Introductionmentioning

confidence: 99%

Moisture effect on deformability of epoxy/montmorillonite nanocomposite

Glaskova

Aniskevich

2009

J of Applied Polymer Sci

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“…5. Accordingly, the residual imprint area for such an indent is 32.2 Â 32.1 mm 2 .The hardness computed by dividing the maximum load applied by the projected area of the indents is about 890 kg/mm 2 , about 4e7 times larger than that of the common used permalloys [14] indicating the much better wearability. In addition, a number of slip-steps markings are seen in the vicinity of the indentation for the alloys.…”

Section: Resultsmentioning

confidence: 95%

Effect of B to P concentration ratio on glass-forming ability and soft-magnetic properties in [(Fe0.5Ni0.5)0.78B0.22−xPx]97Nb3 glassy alloys

et al. 2012

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“…The saturation magnetization of iron-nickel alloys (Fe-47.5%Ni) reaches 1.5 T, 14 and its corrosion resistance appears limited. [15][16][17] Stainless steel 304L (SS 304L) (0.023% C; 18.22% Cr; 0.34% Si; 8.58% Ni; 1.79% Mn; 0.43% Mo) usually presents a paramagnetic behavior. Therefore, this stainless steel can become ferromagnetic with a martensite structure.…”

Section: Selection Of Iron-cobalt Alloys For Mri-based Propulsionmentioning

confidence: 99%

Corrosion study of iron‐cobalt alloys for MRI‐based propulsion embedded in untethered microdevices operating in the vascular network

et al. 2010

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Our group have shown in an experiment performed in the carotid artery of a living swine that magnetic gradients generated by a clinical magnetic resonance imaging (MRI) system could propel and navigate untethered medical microdevices and micronanorobots in the human vasculature. The main problem with these devices is that the metal necessary for magnetic propulsion may corrode and induce cytotoxic effects. The challenge, then, is to find an alloy with low corrosion yet providing an adequate magnetization level for propulsion in often stringent physiological conditions. Because of their high magnetization, we studied the corrosion behavior of two iron-cobalt alloys, Permendur (49% Fe, 49% Co, 2% V) and Vacoflux 17 (81% Fe, 17% Co, 2% Cr), in physiological solution by potentiodynamic polarization assay, surface analysis, and corrosion electrolyte analysis. Both alloys exhibited low corrosion parameters such as a corrosion potential (E corr ) of 20.57 V/SCE and E corr of 20.42 V/SCE for Vacoflux 17. The surface of Permendur samples was homogenously degraded. Vacoflux 17 surface was impaired by cracks and crevices. Both alloys had a stoichiometric dissolution in the electrolyte, and they released enough cobalt to induce cytotoxic effects. This study concluded that Fe-Co alloys could be used preferably in medical microdevices if they were coated so as not to come in contact with physiological solutions. '

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50.50 FeNi permalloy with Ti and Cr additions for improved hardness and corrosion resistance

Cited by 21 publications

References 1 publication

Moisture effect on deformability of epoxy/montmorillonite nanocomposite

Moisture effect on deformability of epoxy/montmorillonite nanocomposite

Effect of B to P concentration ratio on glass-forming ability and soft-magnetic properties in [(Fe0.5Ni0.5)0.78B0.22−xPx]97Nb3 glassy alloys

Corrosion study of iron‐cobalt alloys for MRI‐based propulsion embedded in untethered microdevices operating in the vascular network

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