Analysis of surface roughness and oxidation of FeNi-based metal amorphous nanocomposite alloys

Egbu, James; Ohodnicki, Paul R.; Baltrus, John P.; Wright, Ruishu; McHenry, Michael E.

doi:10.1016/j.jallcom.2022.165155

Cited by 13 publications

(6 citation statements)

References 52 publications

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“…In the other cases, the kurtosis values suggest that height distribution is relatively flat with lots of moderately height protrusions (Fig. 6) [31]. It concerns the negative skewness (R sk ) values (Fig.…”

Section: Roughness Measurementsmentioning

confidence: 91%

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Substrates with Different Magnetic Properties Versus Iron-Nickel Film Electrodeposition

Białostocka,

Klekotka,

Klekotka

et al. 2023

Chemistry-Didactics-Ecology-Metrology

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The hereby work presents the iron-nickel alloys electroplated on the different metallic substrates (aluminium, silver, brass) using galvanostatic deposition, with and without presence of the external magnetic field (EMF). The films were obtained in the same electrochemical bath composition - mixture of iron and nickel sulphates (without presence of additives) in the molar ratio of 2 : 1 (Ni : Fe), the electric current density (50.0 mA/cm2), and the time (3600 s). The mutual alignment of the electric (E) and magnetic field (B) was changeable - parallel and perpendicular. The source of EMF was a set of two permanent magnets (magnetic field strength ranged from 80 mT to 400 mT). It was analysed the surface microstructure, composition, morphology, thickness and the mechanical properties (roughness, work of adhesion). The surface morphology and the thickness of films were observed by Scanning Electron Microscopy (SEM) and Confocal Laser Scanning Microscopy (CLSM). The elemental composition of all FeNi films was measured using Wavelength Dispersive X-Ray Fluorescence (WDXRF). The crystalographic analysis of the deposits was carried out by X-Ray Diffraction. Depending on the used substrate, modified external magnetic field orientation influenced the tribological and physio-chemical properties of the deposited layers. The diamagnetic substrates and EMF application reduced the FeNi thickness and the average crystallites size, in contrast to the paramagnetic substrate. Parallel EMF increased the value of the tribological parameters for CuZn and Ag but decreased for Al. The content of FeNi structure was rising in the case of diamagnetic substrate and the dependence was opposite on the paramagnetic substrate.

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Section: Roughness Measurementsmentioning

confidence: 91%

“…The same is in the case of kurtosis (R ku ) values greater than 3 μm (4.92 μm and 5.29 μm). In this situation, the distribution is called leptokurtic [31]. The surfaces are called spiky.…”

Section: Roughness Measurementsmentioning

confidence: 99%

Substrates with Different Magnetic Properties Versus Iron-Nickel Film Electrodeposition

Białostocka,

Klekotka,

Klekotka

et al. 2023

Chemistry-Didactics-Ecology-Metrology

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“…51 This information was used by Byerly et al 10 to determine optimal strain annealing and re-annealing temperatures. Annealing in this temperature range oxidizes the surface to a thickness of ∼10 nm, as explored by Egbu et al 52 Thus, the surfaces of the ribbons tested here are coated with this oxide. The ends of the annealed ribbons were attached to sheet metal grip tabs using cyanoacrylate adhesive, (Figure 1(b)).…”

Section: Methodsmentioning

confidence: 99%

Strength distributions of laminated FeNi-based metal amorphous nanocomposite ribbons

Schneider

McHenry

Boer

2023

Journal of Composite Materials

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Metal Amorphous Nanocomposite (MANC) materials offer low losses at high magnetic switching frequency, enabling high power density motors with increased rotational speed. While MANCs have high strength, they are brittle. The use of motor components such as a rotor consisting of brittle material presents a reliability concern. Here, a promising MANC alloy is subjected to tensile tests and failure is observed with high-speed photography. A method is developed to prepare tensile specimens of laminated MANC and epoxy layers, simulating the stacking of an epoxy-impregnated tape-wound core. Tensile tests are conducted for single layer ribbon and for five- and ten-layer stacks of laminated material with thin layers of thermosetting epoxy. Failure distributions are shown to have increasing Weibull modulus with increasing layer count. The composite MANC material system is modeled using chain-of-bundles models. Using a k-failure model, we show that single ribbon strength distribution data can be used to predict well the failure distribution of laminated stacks. The agreement occurs when the assumed ineffective length, over which load is recovered in a failed layer, is comparable to the observed interlaminar separation length.

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“…AFM can examine samples of different stiffness, regardless of their electrical conductivity, in different environments, from liquid to ultra-high vacuum. This wide range of operating conditions offers the possibility of measuring an equally wide range of samples such as cells [17][18][19], bacteria [20][21][22][23], extracellular vesicles [24,25], self-assembled molecular films [26][27][28][29][30][31][32][33][34][35][36][37][38], Langmuir-Blodgett films [39][40][41][42], supported lipid bilayers (SLB) [43][44][45][46][47][48][49], polymers [50][51][52][53], oxides [54][55][56][57], 2D materials [58][59][60][61][62], and other various materials [63]…”

Section: Introduction On Atomic Force Microscopementioning

confidence: 99%

Morphological Investigation of Protein Crystals by Atomic Force Microscopy

et al. 2023

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In this review, we discuss the progress in the investigation of macromolecular crystals obtained through the use of atomic force microscopy (AFM), a powerful tool for imaging surfaces and specimens at high resolution. AFM enables the visualization of soft samples at the nanoscale and can provide precise visual details over a wide size range, from the molecular level up to hundreds of micrometers. The nonperturbative nature, the ability to scan in a liquid environment, and the lack of need for freezing, fixing, or staining make AFM a well-suited tool for studying fragile samples such as macromolecular crystals. Starting from the first morphological investigations revealing the surface morphology of protein crystals, this review discusses the achievements of AFM in understanding the crystal growth processes, both at the micro- and nanoscale. The capability of AFM to investigate the sample structure at the single molecular level is analyzed considering in-depth the structure of S-layers. Lastly, high-speed atomic force microscopy (HS-AFM) is discussed as the evolution to overcome the limitations of low imaging speed, allowing for the observation of molecular dynamics and weakly adsorbed, diffusing molecules. HS-AFM has provided intuitive views and directly visualized phenomena that were previously described indirectly, answering questions that were challenging to address using other characterization methods.

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Analysis of surface roughness and oxidation of FeNi-based metal amorphous nanocomposite alloys

Cited by 13 publications

References 52 publications

Substrates with Different Magnetic Properties Versus Iron-Nickel Film Electrodeposition

Substrates with Different Magnetic Properties Versus Iron-Nickel Film Electrodeposition

Strength distributions of laminated FeNi-based metal amorphous nanocomposite ribbons

Morphological Investigation of Protein Crystals by Atomic Force Microscopy

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