scholarly journals Magnetic Properties in Finemet-Type Soft Magnetic Toroidal Cores Annealed under Radial Stresses

Metals ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 122
Author(s):  
Zhiyong Xue ◽  
Xuesong Li ◽  
Sajad Sohrabi ◽  
Yu Ren ◽  
Weihua Wang
Keyword(s):  
Magnetic Properties ◽  
Magnetic Anisotropy ◽  
Structural Characteristics ◽  
Routine Method ◽  
Soft Magnetic ◽  
Magnetic Anisotropy Energy ◽  
Soft Magnetic Alloys ◽  
Novel Approach ◽  
Magnetic Inductance ◽  
Nanocrystalline Soft Magnetic Alloys

Applying tensile stresses on straight soft magnetic ribbons before core fabrication is a routine method of inducing magnetic anisotropy, while methods of stress annealing of ribbons after core winding are seldom explored. In this study, we utilize a novel approach to induce magnetic anisotropy by applying radial stresses on tape-wound cores of Fe73.5Si13.5B9Cu3Nb1 (at. %) ribbon during crystallization heat treatment. The results show that while stress annealing does not change the structural characteristics of annealed samples, the magnetic anisotropies induced can increase to values ~3–5 times larger than the sample annealed in the absence of external stress. This increase in magnetic anisotropy energy is associated with ~25–50% decrease of magnetic inductance in the treated cores. These results suggest that the magnetic properties of nanocrystalline soft magnetic alloys can be effectively tuned by applying radial stresses.

EFFECT OF ANNEALING TEMPERATURE ON THE STRUCTURE AND AC MAGNETIC PROPERTIES OF Fe73Cu1Nb3.5-xVxSi13.5B9 (x = 1.0, 1.5, 2.0) NANOCRYSTALLINE SOFT MAGNETIC ALLOYS

2013 ◽  
Vol 27 (19) ◽  
pp. 1341013
Author(s):  
WEI LU ◽  
PING HUANG ◽  
YUXIN WANG ◽  
BIAO YAN
Keyword(s):  
Magnetic Properties ◽  
Strong Influence ◽  
Annealing Temperature ◽  
Iron Loss ◽  
Soft Magnetic ◽  
Magnetic Alloys ◽  
Annealing Temperatures ◽  
Grain Sizes ◽  
Soft Magnetic Alloys ◽  
Nanocrystalline Soft Magnetic Alloys

In this paper, Nb element was partially replaced by V element in Finemet-type Fe 73 Cu 1 Nb 3.5-x V x Si 13.5 B 9 (x = 1, 1.5, 2) alloys and the effect of annealing temperatures on the microstructure and AC magnetic properties of the samples are studied. The annealing temperatures affect the grain sizes of the bcc α- Fe phase greatly. When the annealing temperature is between 540–560°C, the samples have better AC magnetic properties than the samples annealed at other temperatures. The optimized annealing temperature of the studied samples is around 560°C. The coercivity and iron loss of the V2 sample is a little bit higher than that of V1 and V1.5 alloys while the amplitude permeability of V2 alloy is larger than that of V1 and V1.5, which indicate that the content of V element has strong influence on the magnetic properties of nanocrystalline soft magnetic alloys.

Thermal Stability of Nanocrystalline Soft Magnetic Alloys with Different Inhibitors

2019 ◽  
Vol 821 ◽  
pp. 250-255
Author(s):  
Vladimir S. Tsepelev ◽  
Yuri N. Starodubtsev ◽  
V.Ya. Belozerov
Keyword(s):  
Thermal Stability ◽  
Magnetic Properties ◽  
Nanocrystalline Alloy ◽  
Soft Magnetic ◽  
Magnetic Alloys ◽  
Substitution Solid Solution ◽  
Vacancy Clusters ◽  
Soft Magnetic Alloys ◽  
Thermal Stability Of ◽  
Nanocrystalline Soft Magnetic Alloys

In this work, the effect of different inhibitors on the thermal stability of the magnetic properties in Fe73.5Cu1M3Si13.5B9 nanocrystalline alloys, where M = Nb, W, Mo, was investigated. Nanocrystalline alloy with tungsten has the greatest thermal stability. The change in the magnetic properties in the ageing process was associated with vacancies and vacancy clusters, the formation of which is facilitated by large atoms of inhibitory elements occupying free positions in the substitution solid solution.

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