Interrelation of Hysteresis Characteristics of a Soft Magnetic Nanocrystalline Alloy

et al. 2018

DDF

It is clearly seen that the magnetic induction of the amorphous ribbon produced by conventional technology implying heating up to 1490 °С increases as the thickness of specimens increases, with this growth being especially intensive at the 100 А/m magnetic field strength. At the same time, the melt preparation supplemented by overheating contributes to the magnetic induction stabilization, i.e. magnetic induction is essentially independent of the ribbon’s thickness. It is only at high values of h that a slight increase in magnetic induction becomes evident. The fracture diameter of the free side surface is linearly increasing as the annealing temperature increases. The structure has been shown to influence magnetic and mechanical properties of the material in preparing the melt before casting.

Section: Resultsmentioning

confidence: 79%

Magnetic and Mechanical Properties of the Amorphous Alloys

et al. 2018

DDF

“…From the Rayleigh equations, one can find relations connecting the parameters of the hysteresis loop [129,130], in particular, the hysteresis losses can be calculated by the formulas:…”

Section: Comparison Of Hysteresis Losses For O and T Cores In Thementioning

confidence: 99%

Nanocrystalline Soft Magnetic Iron-Based Materials from Liquid State to Ready Product

2021

Nanomaterials

The review is devoted to the analysis of physical processes occurring at different stages of production and application of nanocrystalline soft magnetic materials based on Fe–Si–B doped with various chemical elements. The temperature dependences of the kinematic viscosity showed that above a critical temperature, the viscosity of multicomponent melts at the cooling stage does not coincide with the viscosity at the heating stage. Above the critical temperature, the structure of the melt is more homogeneous, the amorphous precursor from such a melt has greater plasticity and enthalpy of crystallization and, after nanocrystallization, the material has a higher permeability. The most effective inhibitor elements are insoluble in α-Fe and form a smoothed peak of heat release during crystallization. On the other hand, the finest nanograins and the highest permeability are achieved at a narrow high-temperature peak of heat release. The cluster magnetic structure of a nanocrystalline material is the cause of magnetic inhomogeneity, which affects the shape of the magnetic hysteresis loop and core losses.

“…Relationship (2) was for the first time used by Steinmetz [13] for the dependence of hysteresis losses on the maximal induction B max . The change in the numerical value of the exponent s in formula (2) can be caused by the change in the type of magnetization reversal [1][2]14].…”

Section: Introductionmentioning

confidence: 99%

Scaling of Minor Hysteresis Loops in Soft Magnetic Amorphous Alloy

Tsepeleva

et al. 2018

KEM

Scaling of minor hysteresis loops in the amorphous alloy Co66Fe3Cr3Si15B13with a very high initial permeability (more than 150000) and low coercivity (about 0.1 А/m) has been studied. In weak magnetic fields and in the region of maximal growth of permeability a similarity of minor loops was detected. Analytical expressions for hysteresis losses are derived which provide a good accordance of calculations with the results of measurements.