Characterization of crystallization in Metglas 2826 MB alloy

Mizgalski, K. P.; Inal, O. T.; Yost, F.G.; Karnowsky, M. M.

doi:10.1007/bf00586297

Cited by 29 publications

(11 citation statements)

References 9 publications

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“…The diffusion capacity in fcc systems 10 is much smaller when compared with bcc systems 6 . Finally, the values of D 0 and Q obtained in this study are consistent with the diffusion in metallic systems which occurs via interstitial jump mechanisms or in the case of amorphous structure, the arrangements of short-range order 11 .…”

Section: Resultsmentioning

confidence: 95%

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Hydrogen gas permeation through amorphous and partially crystallized Fe40Ni38Mo4B18

Ribeiro¹,

Lemus²,

Santos³

2012

Mat. Res.

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gas permeation from 523 to 643 K. The hydrogen permeation curves exhibited a single sigmoidal shape, typical of tests where no hydride formation occurs. It was observed that the hydrogen diffusivity increases for the amorphous samples and partially crystallized alloy with the temperature increase. The hydrogen diffusion coefficient as a function of temperature was found to be D = 5.1 ± 0.5 × 10 -12 exp (-11.0 ± 3.5/RT) (m ) for the partially crystallized condition. This suggests that the annihilation of defects in the amorphous structure and the crystalline phase precipitate contributes to the increase of the hydrogen diffusion.

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Section: Resultsmentioning

confidence: 95%

“…It is important to note that the product of crystallization of Fe 40 Ni 38 Mo 4 B 18 is fcc 10 Fe-Ni phase, due to the high nickel content in this alloy. The diffusion capacity in fcc systems 10 is much smaller when compared with bcc systems 6 .…”

Section: Resultsmentioning

confidence: 99%

Hydrogen gas permeation through amorphous and partially crystallized Fe40Ni38Mo4B18

Ribeiro¹,

Lemus²,

Santos³

2012

Mat. Res.

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“…As in that earlier study [5], we have initiated the development of Fe-B-based BMG choosing Zr as additional element to enhance the glass forming ability GFA [3] of an initial Fe 40 [6,7], a melt stability criterion according to Jones [8], that directs its choice as precursor material for development of BMG. The GFA of the processed materials: ribbons, strips, and ingots were evaluated by the ∆Tx = Tx − Tg parameter, where Tx is the onset crystallization temperature and Tg the glass transition temperature, obtained by thermal analysis experiments.…”

Section: Introductionmentioning

confidence: 99%

“…The dendrite axis is also tricky because of its content in boron. They can be described as c-Fe x Ni 23 − x (Mo)B 6 or/and B-Mo rich phases. A detailed study of the crystalline phases in Fe 40 Ni 38 Mo 4 B 18 alloy will be published further elsewhere.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, the growth of the crystal may be attributed to the low cooling rate due to higher fluidity, or low viscosity as dT/dt is proportional to 1/η; η is the viscosity [10]. 6 . This suggestion fuels the belief that the halo is not representative of the distance between individual atoms but rather group of atoms of a given family of plane, at least at a scale length of about 0.5-1 nm.…”

Section: Introductionmentioning

confidence: 99%

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Development of Fe-B Based Bulk Metallic Glasses: Morphology of Residual Phases in Fe50Ni16Mo6B18Zr10 Glass

Aboki

2013

Metals

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Iron-boron based bulk metallic glasses (BMG) development has been initiated using Fe 40 Ni 38 Mo 4 B 18 as precursor. Addition of zirconium up to 10 atomic % along with the reduction of Ni proportion improves the glass forming ability (GFA), which is optimum when Ni is suppressed in the alloy. However melting instability occurred during the materials fabrication resulting in the formation of residual crystalline phases closely related to the amorphous phase. Microstructure study shows an evolution from amorphous structure to peculiar acicular structure, particularly for Fe 50 Ni 16 Mo 6 B 18 Zr 10 , suggesting the amorphous structure as interconnected atomic sheets like "atomic mille feuilles" whose growth affects the alloys' GFA.

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Crystallization of metallic glass Fe46N31VSi8B14

Mao¹,

Wang²,

He³

1988

Phys. Stat. Sol. (a)

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The crystallization behavior of a multi‐component metallic glass Fe46Ni31VSi8B14 is examined in detail by using differential thermal analysis, X‐ray diffraction, and electron microscope in‐situ observation, etc. The crystallization of the glassy specimen proceeds in two steps, with (Ni, Fe) solid solution and α‐Fe structure‐like crystalline phase precipitating in the first stage, followed by three other crystalline phases, (FeNiV)3(SiB), Ni31Si12, and (FeNiV)23 (SiB)6, forming in the metalloid‐rich residual amorphous matrix in the second stage. It is noticed that the phase of α‐Fe structure shows metastability and transformed gradually into (Ni, Fe) solid solution and (FeNiV)2 (SiB). Almost immediately by the end of this process begins the transformation of other two metastable phases, i.e. (FeNiV)3 (SiB) and (FeNiV)23 (SiB)6, into stable phases, leaving finally in the specimen altogether three stable phases, (Ni, Fe) solid solution, Ni31Si12, and (FeNiV)2 (SiB), in equilibrium. It follows from both the results and those for a few Fe‐ and FeNi based multi‐component metallic glasses that metastable and also stable crystalline phases would precipitate concurrently upon crystallization from the amorphous matrix of a multi‐component metallic glass and the metastable phases transform sequentially into stable phases with further rise of temperature.

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Characterization of crystallization in Metglas 2826 MB alloy

Cited by 29 publications

References 9 publications

Hydrogen gas permeation through amorphous and partially crystallized Fe40Ni38Mo4B18

Hydrogen gas permeation through amorphous and partially crystallized Fe40Ni38Mo4B18

Development of Fe-B Based Bulk Metallic Glasses: Morphology of Residual Phases in Fe50Ni16Mo6B18Zr10 Glass

Crystallization of metallic glass Fe46N31VSi8B14

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