Crystallization behaviours around the glass transition temperature in an amorphous Fe–Nb–B alloy

Hirata, Akihiko; Hirotsu, Yoshihiko; Matsubara, Eiichiro

doi:10.1016/j.intermet.2009.03.007

Cited by 10 publications

(3 citation statements)

References 17 publications

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“…These processes have been discussed elsewhere [2,26,50,[71][72][73][74][75][76][77][78][79][80][81][82][83], and could all produce an exothermic heat signal. Crystallization in other Fe-based systems has been found to occur below the reported crystallization temperatures, and even up to 40°C below T g [84,85]. Minor phases detected during early stages of SAM2X5 devitrification include those based on Cr 2 B, WC, Fe 23 C 6 , and -Fe phases [40].…”

Section: Devitrification Of Sam2x5mentioning

confidence: 95%

Designing in situ and ex situ bulk metallic glass composites via spark plasma sintering in the super cooled liquid state

et al. 2016

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Crystallization inhibits metallic glass forming in the super cooled liquid state and can be avoided if sufficiently fast heating rates can be obtained, but becomes increasingly difficult for marginal glass formers. We propose that dynamic pressing can enhance formability, and demonstrate that density of an iron-based marginal glass forming alloy (Fe 49.7 Cr 17.1 Mn 1.9 Mo 7.4 W 1.6 B 15.2 C 3.8 Si 2.4 ) can be enhanced by coupling loading rate to fast heating rate during spark plasma sintering. We also describe the transformation kinetics for devitrification in a time-temperature-crystallinity diagram. The combination of coupled loading/fast heating and the time-temperature-crystallinity diagram define the processing requirements for obtaining a dense X-ray amorphous structure and can also be used to design a wide variety of dense in situ composites. Finally, we demonstrate that the design approach also applies to ex situ composites by adding microcrystalline W or Ta, enabling systematic control of atomic-, nano-, and micro-structure. This multi-scale structure control of bulk metallic glass composites has implications for developing a fundamental understanding of structure-property relationships. We expect this general approach will be applicable to other bulk metallic glass composites, and especially beneficial for marginal glass formers that are otherwise difficult to process.

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Section: Devitrification Of Sam2x5mentioning

confidence: 95%

Designing in situ and ex situ bulk metallic glass composites via spark plasma sintering in the super cooled liquid state

et al. 2016

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“…The revealed values of d-spacings were found to suit closely with the interplanar spacings of bcc Fe and Fe 2 B phase, adequately. Similarly, Hirata et al [37] examined a crystallization process of Fe 70 Nb 10 B 20 glass by means of transmission electron microscopy. They found that the dense bcc-Fe nanocrystals quickly grow after sample heating around the glass-transition temperature.…”

Section: Resultsmentioning

confidence: 99%

Characterization of atomic-level structure in Fe-based amorphous and nanocrystalline alloy by experimental and modeling methods

Babilas

2015

Materials Characterization

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“…Because of these initial inspiring results, there has been a good amount of research carried out in improving the corrosion resistance of such amorphous system further through compositional optimization. Detailed investigation on corrosion properties in different Fe-based MGs was performed by T. Masumoto [45][46][47][48][49][50], K. Hashimoto [51][52][53][54][55][56][57] and A. Inoue in the twentyfirst century [58][59][60][61][62], at Institute for Materials Research, Tohoku University, Japan. Fundamental goal of these studies was intended at investigating the effect of alloying elements on the characteristics of passive films.…”

Section: Historical Background Of Fe-based Metallic Glass Coatings' C...mentioning

confidence: 99%

Fe-based metallic glass coatings by thermal spraying: a focused review on corrosion properties and related degradation mechanisms

Nayak

Kumar

Laha

2022

International Materials Reviews

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Among various materials available for alleviating the corrosion-related degradation, thermal sprayed Fe-based metallic glass coatings (MGCs) have received huge attention from the scientific community due to the exceptional combination of mechanical and corrosion properties, along with commercially attractive low material cost of this particular alloy system. Emerging reports on the thermal sprayed Fe-based MGCs outperforming conventional corrosion-resistant materials and coatings have accelerated further exploration of this domain, resulting in an immense increase of research activities over the last few decades producing fascinating results. This review takes a holistic approach encompassing an in-depth assessment of all the relevant salient work till date, including corrosion properties, corresponding degradation mechanisms, metallurgical and environmental factors with reference to passive film dynamics and/or formation of corrosion products. Moreover, various strategies for improved corrosion properties and recent research progress have been reviewed with an attempt to identify the present knowledge gaps and the future research directions.

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Crystallization behaviours around the glass transition temperature in an amorphous Fe–Nb–B alloy

Cited by 10 publications

References 17 publications

Designing in situ and ex situ bulk metallic glass composites via spark plasma sintering in the super cooled liquid state

Designing in situ and ex situ bulk metallic glass composites via spark plasma sintering in the super cooled liquid state

Characterization of atomic-level structure in Fe-based amorphous and nanocrystalline alloy by experimental and modeling methods

Fe-based metallic glass coatings by thermal spraying: a focused review on corrosion properties and related degradation mechanisms

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