scholarly journals Effect of heat treatment on ac and dc magnetic properties of high permeability soft magnetic alloys 1J85

2012 ◽  
Vol 27 ◽  
pp. 652-657
Author(s):  
Chenghui Lei ◽  
Bing Wang ◽  
Yue Chen
Keyword(s):  
Heat Treatment ◽  
Magnetic Properties ◽  
High Permeability ◽  
Soft Magnetic ◽  
Magnetic Alloys ◽  
Soft Magnetic Alloys

Microstructure Evolution upon Thermomagnetic Treatment of Soft Magnetic Alloys

2009 ◽  
Vol 152-153 ◽  
pp. 66-69 ◽  
Author(s):  
V.V. Gubernatorov ◽  
T.S. Sycheva ◽  
Irina I. Kositsyna
Keyword(s):  
Electron Microscopy ◽  
Magnetic Properties ◽  
Microstructure Evolution ◽  
Soft Magnetic Materials ◽  
Thermomagnetic Treatment ◽  
Soft Magnetic ◽  
Magnetic Alloys ◽  
Treatment Mode ◽  
Soft Magnetic Alloys ◽  
Microscopy Examination

A new concept is suggested that serves to explain the effects of thermomagnetic treatment. Its validity is proved via measurements of magnetic properties and electron microscopy examination of structure of soft magnetic materials after different treatments. This concept allows one to consciously choose the treatment mode aiming on improvement of magnetic properties of alloys.

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.

Nanocrystallization Behavior of Fe40Ni38B18Mo4 Soft Magnetic Alloy

2005 ◽  
Vol 23 ◽  
pp. 207-210 ◽  
Author(s):  
S.W. Du ◽  
R.V. Ramanujan
Keyword(s):  
Heat Treatment ◽  
Early Stage ◽  
Amorphous Ribbon ◽  
Composition Analysis ◽  
Treatment Schedule ◽  
Magnetic Alloy ◽  
Soft Magnetic ◽  
Magnetic Alloys ◽  
Soft Magnetic Alloy ◽  
Soft Magnetic Alloys

The Herzer model suggests that superior magnetic properties can be observed in magnetic alloys provided a suitable microstructure consisting of soft magnetic nanometre size precipitates separated by nanometre size distances is obtained. In order to explore new magnetic alloy compositions which can satisfy the Herzer model, we studied selected alloys in which we wished to obtain suitable microstructures, one such alloy has the composition Fe40Ni38B18Mo4. This alloy is amorphous as received, the heat treatment schedule required to obtain nanoprecipitates was designed based on DSC, resistivity and x-ray results. Heat treatment at temperatures between 420 0C and 500 0C and different heat times was carried out on the amorphous ribbon. Transmission Electron Microscopy (TEM) results of the early stage of crystallization behavior showed that soft magnetic precipitates of nano-size were indeed observed within the amorphous matrix. The crystal structure, composition analysis and thermal stability of the precipitates were studied by XRD, EDS and TEM. These results will be presented and the implication of these results to the production of new soft magnetic alloys will be emphasized.

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