Air-oxidation behavior of a [(Fe50Co50)75B20Si5]96Nb4 bulk metallic glass at 500–650°C

Kai, Wu; Wu, Yue; Chen, W.S.; Tsay, L.W.; Jia, Haoling; Liaw, Peter K.

doi:10.1016/j.corsci.2012.08.046

Cited by 18 publications

(5 citation statements)

References 16 publications

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“…The same crystallization characteristics can be also observed in the other FeCo-based amorphous alloys fabricated by traditional melt-spinning technique [30]. Compared with FeCo-based amorphous alloys with additions of amorphous-promoting elements such as B and Si, the amorphous FeCo nanoparticles exhibit relatively lower transition temperature due to their high-purity [31]. Among three amorphous samples, the sample prepared with 1.5 g PVP additions exhibits the highest transition temperature of 468 °C, which can be ascribed to their uniform particle sizes with narrow size distribution.…”

Section: Resultsmentioning

confidence: 67%

Chemical Synthesis of High-Stable Amorphous FeCo Nanoalloys with Good Magnetic Properties

Yang

et al. 2018

Nanomaterials

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It is difficult to fabricate high-purity amorphous FeCo alloys by traditional physical methods due to their weak glass forming ability. In this work, the fully amorphous FeCo nanoalloys with high purity and good stability have been prepared by a direct chemical reduction of Fe2+ and Co2+ ions with NaBH4 as the reducing agent and polyvinylpyrrolidone (PVP) as the surfactant. The morphologies, surface compositions and particle sizes with their distribution of these amorphous samples can be effectively tuned by the suitable PVP additions. High crystallization temperature up to 468 °C, high saturation magnetization of 196.2 A·m2·kg−1 and low coercivity of 83.3 Oe are obtained in amorphous FeCo nanoalloys due to their uniform distribution, weak surface oxidation and low surface B concentration. Good frequency-dependent magnetic properties can be also achieved in the fully compacted amorphous sample with a high density of 7.20 g/cm3. The simple chemical method, high stability and good magnetic properties for these amorphous FeCo nanoalloys promise their significant potential applications in high-power magnetic devices.

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Section: Resultsmentioning

confidence: 67%

Chemical Synthesis of High-Stable Amorphous FeCo Nanoalloys with Good Magnetic Properties

Yang

et al. 2018

Nanomaterials

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“…It should be noticed that in this paper, the surface segregation refers to the redistribution and nonuniform distribution of elements on the sample surface as well as inside the sample matrix caused by the ionic diffusion during oxidation. Meanwhile, since BMG is widely used in the manufacture of micro or nano-sized components [17][18][19][20], oxidation and related surface segregation will seriously affect the surface finish and dimension accuracy of products [21][22][23]. Therefore, in this paper, we mainly paid our attentions to the surface morphology evolution and related oxidation kinetics.…”

Section: Introductionmentioning

confidence: 98%

“…Although some research works have discussed the multiplestage parabolic rate law and ionic diffusion phenomenon during BMG oxidation [13][14][15][16], few attentions have been paid to the relationship between crystallization and oxidation kinetics. Also, detailed investigations on the effects of thermal parameters on surface morphology evolution especially the segregation phenomena are still lacking.…”

Section: Introductionmentioning

confidence: 99%

Air oxidation of a Zr55Cu30Al10Ni5 bulk metallic glass at its super cooled liquid state

et al. 2014

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“…BULK metallic glasses (BMGs) exhibit many desirable properties, e.g., high strengths and hardness, large elastic limits, and excellent corrosion and oxidization resistance, [1][2][3][4][5][6][7] which make them potential candidates as new structural materials. However, BMGs are notorious for their brittle nature upon loading due to the formation of the highly localized shear bands.…”

Section: Introductionmentioning

confidence: 99%

Insights from the Lattice-Strain Evolution on Deformation Mechanisms in Metallic-Glass-Matrix Composites

Jia

Zheng

et al. 2015

Metall Mater Trans A

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In situ high-energy synchrotron X-ray diffraction experiments and micromechanics-based finite element simulations have been conducted to examine the lattice-strain evolution in metallicglass-matrix composites (MGMCs) with dendritic crystalline phases dispersed in the metallicglass matrix. Significant plastic deformation can be observed prior to failure from the macroscopic stress-strain curves in these MGMCs. The entire lattice-strain evolution curves can be divided into elastic-elastic (denoting deformation behavior of matrix and inclusion, respectively), elastic-plastic, and plastic-plastic stages. Characteristics of these three stages are governed by the constitutive laws of the two phases (modeled by free-volume theory and crystal plasticity) and geometric information (crystalline phase morphology and distribution). The load-partitioning mechanisms have been revealed among various crystalline orientations and between the two phases, as determined by slip strain fields in crystalline phase and by strain localizations in matrix. Implications on ductility enhancement of MGMCs are also discussed.

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Air-oxidation behavior of a [(Fe50Co50)75B20Si5]96Nb4 bulk metallic glass at 500–650°C

Cited by 18 publications

References 16 publications

Chemical Synthesis of High-Stable Amorphous FeCo Nanoalloys with Good Magnetic Properties

Chemical Synthesis of High-Stable Amorphous FeCo Nanoalloys with Good Magnetic Properties

Air oxidation of a Zr55Cu30Al10Ni5 bulk metallic glass at its super cooled liquid state

Insights from the Lattice-Strain Evolution on Deformation Mechanisms in Metallic-Glass-Matrix Composites

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