The oxidation behavior of an Fe61B15Zr8Mo7Co5Y2Cr2 bulk metallic glass at 650°C in various oxygen-containing environments

Kai, Wu; Ren, I.F.; Wang, R.F.; Kao, P.C.; Liu, Chang

doi:10.1016/j.intermet.2008.10.012

Cited by 16 publications

(6 citation statements)

References 6 publications

(11 reference statements)

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“…This observation agrees with the literature that boron is oxidized at a temperature higher than 600 °C 62 . B 2 O 3 has also been observed upon oxidation of Fe-based metallic glasses containing boron 43,44,63,64 . Thus it can be concluded that the oxide phases grow as a shell over the entire surface of the metallic glass powder particles.…”

Section: Resultsmentioning

confidence: 93%

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Quantification of Thermal Oxidation in Metallic Glass Powder using Ultra-small Angle X-ray Scattering

Paul

Zhang

Biswas

et al. 2019

Sci Rep

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In this paper, the composition, structure, morphology and kinetics of evolution during isothermal oxidation of Fe 48 Cr 15 Mo 14 Y 2 C 15 B 6 metallic glass powder in the supercooled region are investigated by an integrated ex - situ and in - situ characterization and modelling approach. Raman and X-ray diffraction spectra established that oxidation yielded a hierarchical structure across decreasing length scales. At larger scale, Fe 2 O 3 grows as a uniform shell over the powder core. This shell, at smaller scale, consists of multiple grains. Ultra-small angle X-ray scattering intensity acquired during isothermal oxidation of the powder over a wide Q-range delineated direct quantification of oxidation behavior. The hierarchical structure was employed to construct a scattering model that was fitted to the measured intensity distributions to estimate the thickness of the oxide shell. The relative gain in mass during oxidation, computed theoretically from this model, relatively underestimated that measured in practice by a thermogravimetric analyzer due to the distribution in sizes of the particles. Overall, this paper presents the first direct quantification of oxidation in metallic glass powder by ultra-small angle X-ray scattering. It establishes novel experimental environments that can potentially unfold new paradigms of research into a wide spectrum of interfacial reactions in powder materials at elevated temperatures.

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Section: Resultsmentioning

confidence: 93%

“…It is established that oxidation is a slow, diffusion based phenomenon that occurs on the surface of materials. Reported examinations of oxidation are mostly limited to bulk and ribbon forms of metallic glasses 41–43 . The relatively lower specific surface area of these materials result in the evolution of a minute volumes of oxides 44 .…”

Section: Introductionmentioning

confidence: 99%

Quantification of Thermal Oxidation in Metallic Glass Powder using Ultra-small Angle X-ray Scattering

Paul

Zhang

Biswas

et al. 2019

Sci Rep

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“…For example, the formation of NiZr 2 in the amorphous matrix can be triggered by oxygen [1]. Moreover, the crystalline ZrB 2 appears dominantly in the amorphous Fe-Co-Zr-M-Mo-B cylinder with diameter of 2.5 mm [30] and ZrB 12 was formed as a priority in the bulk Fe 61 B 15 Zr 5 Mo 7 Co 5 Y 2 Cr 2 glass after annealing at 650°C under 10 3 Pa oxygen pressure [31]. Hence, it is understood that the percentage of Zr-B compounds in the samples with c W =0 and 2 at.% prepared under VL condition is higher compared to other samples (Table 4).…”

Section: Discussionmentioning

confidence: 99%

Casting vacuum effects on the precipitates and magnetic properties of Fe-based glassy alloys

Wang

Zhang

Gebert

et al. 2011

Journal of Non-Crystalline Solids

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“…On the other hand, the oxygen content of the bulk oxide is similar to the small round particles. The mechanism of the oxidation of the amorphous ribbon is bulk diffusion controlled transition [1,5]. …”

Section: A Morphologymentioning

confidence: 99%

“…Up to now, the oxidation of amorphous materials was widely investigated, such as bulk metallic glass and Fe-based amorphous ribbons [1][2][3][4]. The oxidation scales for the Fe based bulk metallic glass consisted mainly of boron oxide (B 2 O 3 ) and minor amounts of iron oxides (Fe 3 O 4 /FeO).…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Oxides Morphology of Fe-Based Amorphous Ribbons

Wang¹,

Zhang²

2015

Proceedings of the 2015 International Conference on Structural, Mechanical and Material Engineering

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Abstract-The oxidation behavior of the amorphous ribbons heat treated under different temperature and holding time was deeply investigated. The oxidation morphology was observed by using of SEM equipment. The experiment results show that at the initial stage of oxidation, the morphology of the oxides is small round particles. With the holding time increasing, the small round oxides began to gather into a larger oxide. What's more, the amount of the oxides increased. Besides, the experiment results also proved that the existence of the impurity and defects accelerate the oxidation and the morphology is also round particles. Increasing the heat treatment temperature, part of the oxidation morphology changed, some cracks formed in the oxides. Altogether, the occurrence of the oxidization made the magnetic properties of the amorphous ribbons deteriorate.

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The oxidation behavior of an Fe61B15Zr8Mo7Co5Y2Cr2 bulk metallic glass at 650°C in various oxygen-containing environments

Cited by 16 publications

References 6 publications

Quantification of Thermal Oxidation in Metallic Glass Powder using Ultra-small Angle X-ray Scattering

Quantification of Thermal Oxidation in Metallic Glass Powder using Ultra-small Angle X-ray Scattering

Casting vacuum effects on the precipitates and magnetic properties of Fe-based glassy alloys

Investigation on the Oxides Morphology of Fe-Based Amorphous Ribbons

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