DISCUSSION ON “THE POWDER METALLURGY OF MAGNETIC MATERIALS”

1960 ◽  
Vol 3 (5) ◽  
pp. 155-159
Keyword(s):  
Powder Metallurgy ◽  
Magnetic Materials

scholarly journals Advances in Powder Metallurgy Soft Magnetic Composite Materials

2017 ◽  
Vol 62 (2) ◽  
pp. 1149-1154 ◽  
Author(s):  
R. Bureš ◽  
M. Strečková ◽  
M. Fáberová ◽  
P. Kollár ◽  
J. Füzer
Keyword(s):  
Powder Metallurgy ◽  
Magnetic Materials ◽  
Automotive Industry ◽  
Core Loss ◽  
Soft Magnetic Materials ◽  
Magnetic Composite ◽  
Transportation Industry ◽  
Soft Magnetic ◽  
Magnetic Composites ◽  
High Frequency Region

Abstract Powder metallurgy has grown with the expansion of various industry. Automotive industry had the most strong influence. Today, more than 90% of PM products are used in the transportation industry. Development of new materials such as magnetic materials is expected to meet the new trends of automotive industry, electric and hybrid vehicles. Soft magnetic composites (SMC) are PM materials based on ferromagnetic powder particles covered by electric insulation layer. Concept of SMC’s and PM technologies offer possibility to become faster, use higher frequencies, become smaller and denser, save more energy, achieving high permeability and lower core loss in high frequency region, which is required for soft magnetic materials. Investigation of correlations among compaction parameters, inner structure, magnetic and mechanical properties are presented.

The Exchange Energy Term and the Curling Reversal Mode in Hard Magnetic Materials Manufactured by Powder Metallurgy

2017 ◽  
Vol 899 ◽  
pp. 549-553
Author(s):  
Amilton Ferreira da Silva Jr. ◽  
Adriano S. Martins ◽  
Marcos Flavio de Campos
Keyword(s):  
Grain Size ◽  
Powder Metallurgy ◽  
Magnetic Materials ◽  
Anisotropy Field ◽  
Exchange Energy ◽  
Cosine Function ◽  
Hysteresis Curve ◽  
Energy Term ◽  
Hard Magnetic Materials ◽  
Exchange Effects

The curling reversal mode is discussed, with emphasis on the assumptions of the model, many of them unrealistic. The curling mode assumes the Bloch approximation, where a cosine function is approximated by a polynomial of second order. It is argued that if the curling model takes place, this could affect the anisotropy field, and then the anisotropy field would be function of the grain size, but this is not observed. Exchange effects may affect hysteresis curve, as discussed in the SW-CLC model.

Sign in / Sign up

Export Citation Format

Share Document