Crystallization of Co-based amorphous alloys under the impact of the ion irradiation and recovery of the amorphous phase

Крапошин, В. С.; Khmelevskaya, V. S.; Yazvitsky, M.Yu.; Antoshina, I. A.

doi:10.1016/j.jnoncrysol.2007.05.038

Cited by 14 publications

(5 citation statements)

References 4 publications

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“…It is probable that reamorphization of the alloy occurs due to the laser irradiation, but full crystallization would require more energy. A similar crystallization behavior has been observed for Cobased amorphous alloys exposed to radiation [1] and for laser irradiation of amorphous ribbons of Fe 73.7 Nb 2.4 Cu 1.0 Si 15.5 B 7.4 [2].…”

Section: Resultssupporting

confidence: 78%

Structural changes and mechanical properties of amorphous metallic ribbons Fe–(Ni, Co, Mn)–Mo–Si–B irradiated by powerful nanosecond laser pulses

Mudry¹,

Nykyruy²

2011

Chem. Met. Alloys

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The influence of pulsed laser radiation on the structure and mechanical properties of amorphous Fe-(Ni, Co, Mn)-Mo-Si-B films has been investigated. The structural changes caused by the irradiation were studied by X-ray diffraction and the microhardness of the initial and irradiated samples was measured by the Vickers method. It was established that small additions of Ni, Co, or Mn have a significant influence on the crystallization process of the irradiated alloys. Irradiation leads to an increase of the microhardness for some values of pulse energy.

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Section: Resultssupporting

confidence: 78%

Structural changes and mechanical properties of amorphous metallic ribbons Fe–(Ni, Co, Mn)–Mo–Si–B irradiated by powerful nanosecond laser pulses

Mudry¹,

Nykyruy²

2011

Chem. Met. Alloys

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“…This is manifested in particular by a reduction in the temperature threshold of the crystallization process. In [4] it was shown that during isothermal annealing of the amorphous alloy Co 86,7 Fe 3.6 Si 2.7 Mn 3.5 B 3.5 after ion irradiation in the temperature range (200500) • C, the alloy returns to the amorphous state. After isothermal annealing of the alloy at a temperature of 200 • C, crystallization begins, and isothermal annealing of the alloy at higher temperatures (250…”

Section: Introductionmentioning

confidence: 99%

Nanocrystallization of amorphous alloys under the action of irradiation with argon ions

Tsaregradskaya,

Ovsiienko,

Kozachenko

et al. 2024

J. Phys. Stud.

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The purpose of the research is to analyze the possibility of obtaining an amorphous nanostructured state from the original amorphous state by ion irradiation. The processes of phase formation in the Fe75Mo5Si6B14 amorphous alloy under the inuence of argon ion irradiation were investigated using the methods of highly sensitive dilatometry, microhardness measurements, and electron microscopy. The surface treatment of the amorphous alloy with argon ions was carried out at a voltage on the anode of 1 kV and a current through the sample of 1 mA. The surface morphology of the amorphous alloy treated with argon ions was studied under a LensSEI scanning electron microscope. The structure of amorphous alloys is characterized by the presence of frozen-in crystallization centers.It was found that the phenomenon of nanocrystallization is not observed during exposure to ion irradiation for up to 30 minutes. This is explained by the fact that, as a result of ion irradiation, the local temperature on the surface of the sample rises and reaches such values, at which, according to the thermodynamic theory of thermal stability, the frozen centers of crystallization can dissolve in the amorphous matrix. When the ion irradiation time of the source alloy is increased to 45 minutes, a decrease in thermal stability of 25 • C and an increase in microhardness of 8.2% are observed, therefore, the alloy is strengthened. This indirectly indicates the formation of an amorphous-nanocrystalline state in the alloy. Structural changes are also conrmed by the results of studies of the amorphous alloy surface morphology by scanning electron microscopy. After irradiation, both the number of crystal nuclei and their average size increase signicantly (from 20 nm in the source alloy to 65 nm in the irradiated one). The changes in the number and size of crystal nuclei are explained by the fact that at an irradiation time of 45 minutes, the temperature in the regions of the ion tracks reaches threshold values and thermodynamic conditions are created for the growth of frozen crystallization centers.

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“…Irradiation with moderate ion energies may also influence MGs and could be revealed by suitable analytical techniques. Changes in Curie temperatures , thermal stability, crystallization processes , magnetic anisotropy , shapes of hysteresis loops , surface crystallization , etc. were reported.…”

Section: Introductionmentioning

confidence: 99%

Ion irradiation induced structural modifications of Fe₈₁Mo₈Cu₁B₁₀ NANOPERM‐type alloy

Miglierini

Hasiak

2015

Physica Status Solidi (a)

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Structural modifications and their impact upon magnetic properties are studied in amorphous NANOPERM‐type 57Fe81Mo10Cu1B10 metallic glass exposed to irradiation with 130 keV N+ ions to the total fluencies of up to 2.5 × 1017 ions/cm2. Using surface sensitive technique of Mössbauer spectrometry, traces of crystalline phases are found already in the as‐quenched state after the sample production. On the air side of the ribbons, bcc‐Fe dominates whereas on the opposite wheel side, also a presence of Fe3O4 is unveiled. The amount of surface crystallization is higher on the wheel side of the ribbons. After ion irradiation, mostly the air side is affected because it was facing the incident ions. Gradual formation of iron nitrides is observed with increasing ion fluence. Though the radiation damage exhibits itself only at this side of the ribbons, its influence upon bulk magnetic properties is clearly identified by the help of magnetic measurements. Hysteresis loops exhibit changes in their shape as well as coercive field. Along with the formation of magnetic crystalline phases (bcc‐Fe and nitrides), they are caused by structural rearrangement which takes place also inside the amorphous residual phase. Structural modifications are confirmed via evolution of hyperfine magnetic fields with ion fluence. Structural modification of the 57Fe81Mo10Cu1B10 alloy caused by ion irradiation as demonstrated by microstructural (Mössbauer spectrometry (a,b)) and macroscopic (hysteresis loops (c,d)) measurements. As‐quenched (a,c) and 2.5 × 1017 N+/cm2 irradiated (b,d) alloys are compared.

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Crystallization of Co-based amorphous alloys under the impact of the ion irradiation and recovery of the amorphous phase

Cited by 14 publications

References 4 publications

Structural changes and mechanical properties of amorphous metallic ribbons Fe–(Ni, Co, Mn)–Mo–Si–B irradiated by powerful nanosecond laser pulses

Structural changes and mechanical properties of amorphous metallic ribbons Fe–(Ni, Co, Mn)–Mo–Si–B irradiated by powerful nanosecond laser pulses

Nanocrystallization of amorphous alloys under the action of irradiation with argon ions

Ion irradiation induced structural modifications of Fe₈₁Mo₈Cu₁B₁₀ NANOPERM‐type alloy

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Crystallization of Co-based amorphous alloys under the impact of the ion irradiation and recovery of the amorphous phase

Cited by 14 publications

References 4 publications

Structural changes and mechanical properties of amorphous metallic ribbons Fe–(Ni, Co, Mn)–Mo–Si–B irradiated by powerful nanosecond laser pulses

Structural changes and mechanical properties of amorphous metallic ribbons Fe–(Ni, Co, Mn)–Mo–Si–B irradiated by powerful nanosecond laser pulses

Nanocrystallization of amorphous alloys under the action of irradiation with argon ions

Ion irradiation induced structural modifications of Fe81Mo8Cu1B10 NANOPERM‐type alloy

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Ion irradiation induced structural modifications of Fe₈₁Mo₈Cu₁B₁₀ NANOPERM‐type alloy