Structural state and magnetic properties of cementite alloyed with manganese

Ulyanov, A.N.; Чулкина, А. А.; Волков, В. А.; Елсуков, Е. П.; Zagainov, A. V.; Протасов, А. В.; Zykina, I. A.

doi:10.1134/s0031918x12120137

Cited by 8 publications

(6 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…5b, curve 3). This indicates the Н с (Т ann ) dependence was shaped mainly by ferromagnetic cementite, which had a constant of magnetic crystalline anisotropy at the liquid nitrogen temperature several times higher than at room temperature, as was repeatedly observed in [13,14].…”

Section: Resultssupporting

confidence: 73%

Thermo-Induced Phase Transformations in Mechanically Synthesized Nanocomposites Based on (Fe,Mn,Ni)75C25

Чулкина

Ulyanov

Волков

et al. 2021

Bull. Russ. Acad. Sci. Phys.

Self Cite

View full text Add to dashboard Cite

The formation of phases in mechanically synthesized (Fe 0.90−x Mn 0.10 Ni x ) 75 C 25 alloys, where х = 0.05 and 0.10, is studied via X-ray diffraction, Mössbauer spectroscopy, and magnetic measurements. It is shown that certain products form during the mechanosynthesis of the initial powders in a planetary ball mill: cementite doped mainly with manganese, ferrite, and an amorphous phase doped mainly with nickel. Annealing at 500°C and higher temperatures leads to the formation of a composite consisting of cementite and austenite doped mainly with nickel. Cementite regions with two different Curie temperatures form as the alloys cool after high-temperature (700°C) annealing, due to differences in the manganese doping of cementite in these regions.

show abstract

Section: Resultssupporting

confidence: 73%

Thermo-Induced Phase Transformations in Mechanically Synthesized Nanocomposites Based on (Fe,Mn,Ni)75C25

Чулкина

Ulyanov

Волков

et al. 2021

Bull. Russ. Acad. Sci. Phys.

Self Cite

View full text Add to dashboard Cite

show abstract

“…5, b). It can be seen that on the curves H c (T ) there are minimums whose temperature at [9] is close to T C of cementite. After annealing at 300 • C Curie temperature of heterogeneously doped cementite with a strongly distorted crystal lattice is determined by a weakly pronounced and temperatureblurred minimum of the curve H c (T ) in the region of T ≈ −40 • C (Fig.…”

Section: Resultsmentioning

confidence: 87%

“…Since at the temperature of liquid nitrogen cementite after annealing is in a ferromagnetic state, the dependence of H c (T ann ) of the composite (Fig. 1, b, curve 2) in the entire range T ann is determined by the structural state of the cementite [9,16] and the amount of ferritic phase. The higher values σ s of dependence σ s (T ann ) measured at the temperature of liquid nitrogen (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Several magnetic methods are known for determining T C of ferromagnetic phases [9,17,18]. In this study, the method of temperature dependence of the magnetic susceptibility of χ(T ) samples was used to find T C of ferromagnetic cementite in the region of positive measurement temperatures T .…”

Section: Resultsmentioning

confidence: 99%

“…In this regard, temperature measurements of the magnetic characteristics of nanostructured steels and alloys become relevant. The results of magnetic measurements can be used both to confirm the results of X-ray phase analysis and to obtain more complete information about the structural-phase state, in particular, about the doping of the phases of the studied composites [8,9]. In this study, a mechanosynthesized model alloy of the composition of carbidosteel (Fe 0.85 Mn 0.10 Ni 0.05 ) 83 C 17 was chosen for structural and magnetic research.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Temperature investigations of magnetic properties when analyzing the structural phase state of a model nanocomposite with carbidosteel composition

Ulyanov

Чулкина

Ul’yanov

2022

Physics of the Solid State

View full text Add to dashboard Cite

The phase composition, magnetic state of the phases and their influence on the formation of the magnetic hysteresis properties of the nanocomposite with the (Fe0.85Mn0.10Ni0.05)83C17 composition after mechanosynthesis and subsequent annealing have been studied. It is shown that, although the dependences of the coercive force on the annealing temperature H_c(Tann) of the alloy, measured at room and liquid nitrogen temperatures, are curves with maxima, the formation of Hc is driven by different mechanisms. At room temperature measurements, the maximum Hc value of the composite is obtained when the size of the ferrite phase precipitates approaches to the critical single-domain state, whereas at low temperature maximum Hc value is caused by the change of the cementite structural state upon annealing. Keywords: Nanocrystalline Fe-C-Mn-Ni alloys, mechanical alloying, heat treatment, X-Ray diffraction, coercive force, magnetic susceptibility, Curie temperature, Mossbauer spectroscopy.

show abstract

Cementite

Bhadeshia

2019

International Materials Reviews

110

View full text Add to dashboard Cite

Cementite occurs in steels, in meteorites, possibly at the core of the Earth and has uses in its pure form. It's composition can deviate from Fe 3 C, but not by much because the Fe-C bond contributes to its cohesion. Its crystallographic unit cell is orthorhombic and primitive, with large lattice parameters, explaining its hardness. Many of its properties are anisotropic. Its single-crystal elastic properties have been investigated using first-principles calculations and by clever experiments. The iron atoms in the cell occupy two types of positions with different point symmetries; the four carbon atoms lodge within prismatic interstices. The structure can develop defects such as dislocations, faults and vacancies. Cementite is metallic and ferromagnetic with a Curie temperature of about 187 • C. When alloyed, metallic solutes substitute on to the iron sites; smaller atoms such as boron replace carbon at interstitial sites. This review focuses on cementite as a single phase.

show abstract

Structural state and magnetic properties of cementite alloyed with manganese

Cited by 8 publications

References 12 publications

Thermo-Induced Phase Transformations in Mechanically Synthesized Nanocomposites Based on (Fe,Mn,Ni)75C25

Thermo-Induced Phase Transformations in Mechanically Synthesized Nanocomposites Based on (Fe,Mn,Ni)75C25

Temperature investigations of magnetic properties when analyzing the structural phase state of a model nanocomposite with carbidosteel composition

Cementite

Contact Info

Product

Resources

About