Phase formation and magnetic hardening mechanism of TbCu7 type Sm-Fe-N powders

2018 ◽  
Vol 456 ◽  
pp. 6-10
Author(s):  
Cifu Lu ◽  
Xiufeng Hong ◽  
Zhiyi Ding ◽  
Jiaxing Shi ◽  
Xiaoqian Bao ◽  
...  
Keyword(s):  
Phase Formation ◽  
Hardening Mechanism ◽  
Magnetic Hardening

Magnetic hardening mechanism in low-cobalt Fe-Cr-Co Alloys

1990 ◽  
Author(s):  
J.J. Wyslocki ◽  
J. Olszewski ◽  
B. Wyslocki ◽  
S. Szymura ◽  
J. Wojcik
Keyword(s):  
Hardening Mechanism ◽  
Magnetic Hardening ◽  
Co Alloys

Magnetic Hardening Mechanism in Sintered R-Fe-B Permanent Magnets

1987 ◽  
Vol 96 ◽  
Author(s):  
M. Sagawa ◽  
S. Hirosawa
Keyword(s):  
Permanent Magnet ◽  
Permanent Magnets ◽  
State Of The Art ◽  
Spontaneous Magnetization ◽  
Experimental Results ◽  
Surface Conditions ◽  
Hardening Mechanism ◽  
Sintered Magnets ◽  
Field Coefficient ◽  
Magnetic Hardening

ABSTRACTThe state-of-the-art description of the magnetic hardening mechanism in the sintered Nd-Fe-B permanent magnet is given. Recent experimental results concerning the coercivity-anisotropy (Hc -HA) correlation in B-rich Pr-Fe-B and Nd-Fe-B sintered magnets and the inhluence of the surface conditions of the sintered Nd-Fe-B magnets on the coercivity are reported. These results are interpreted in terms of the μ0Hc versus cμ0 HA -NIS plot, where I is the spontaneous magnetization of R2 Fe14 (R=Pr or Nd) and N the effective demagnetization field coefficient.

scholarly journals Magnetic hardening mechanism study in FePt thin films

1999 ◽  
Vol 85 (8) ◽  
pp. 4886-4888 ◽  
Author(s):  
C. M. Kuo ◽  
P. C. Kuo ◽  
H. C. Wu ◽  
Y. D. Yao ◽  
C. H. Lin
Keyword(s):  
Thin Films ◽  
Mechanism Study ◽  
Hardening Mechanism ◽  
Magnetic Hardening ◽  
Fept Thin Films

Magnetic hardening mechanism of SmCo6.6Nb0.4 nanoflakes prepared by surfactant-assisted ball milling method

2014 ◽  
Vol 115 (17) ◽  
pp. 17A713 ◽  
Author(s):  
Y. Q. Li ◽  
M. Yue ◽  
Q. Wu ◽  
W. Q. Liu ◽  
Y. Q. Liu ◽  
...  
Keyword(s):  
Ball Milling ◽  
Hardening Mechanism ◽  
Milling Method ◽  
Magnetic Hardening ◽  
Surfactant Assisted

Magnetic properties and magnetic hardening mechanism of Pt‐Co‐B alloys

1994 ◽  
Vol 76 (3) ◽  
pp. 1733-1740 ◽  
Author(s):  
Ning Qiu ◽  
William F. Flanagan ◽  
James E. Wittig
Keyword(s):  
Magnetic Properties ◽  
Hardening Mechanism ◽  
Magnetic Hardening

Evolution of intrinsic coercivity in Pt-Co-B alloys

1992 ◽  
Vol 50 (1) ◽  
pp. 202-203
Author(s):  
N. Qiu
Keyword(s):  
Permanent Magnets ◽  
Ternary Alloys ◽  
Good Thermal Stability ◽  
Hardening Mechanism ◽  
Potential Applications ◽  
Magnetic Hardening ◽  
Rapidly Solidification ◽  
Evolution Of Microstructure ◽  
Rapidly Solidified ◽  
Thermal Stability Of

New permanent magnets based on Pt-Co-B ternary alloys have been developed by rapidly solidification with subsequent heat treatments. The coercivity achieved in the Pt-Co-B ternary alloys is more than double the highest coercivity observed in the Pt-Co binary system. Good thermal stability of the coercivity produced by annealing provides a basis for consolidation processes such as hot isotropic pressing to produce bulk magnets from the rapidly solidified Pt-Co-B materials. Increased coercivity coupled with special properties such as high Curie temperature, corrosion resistance and ductility may expand the potential applications for these alloys. The evolution of microstructure and its effect on coercivity from annealing the as-quenched materials are investigated to understand the magnetic hardening mechanism and optimize the magnetic properties.

Magnetic hardening mechanism in sintered R–Fe–B permanent magnets

1988 ◽  
Vol 3 (1) ◽  
pp. 45-54 ◽  
Author(s):  
M. Sagawa ◽  
S. Hirosawa
Keyword(s):  
Temperature Dependence ◽  
Permanent Magnets ◽  
Spontaneous Magnetization ◽  
Short Review ◽  
Experimental Results ◽  
Surface Conditions ◽  
Hardening Mechanism ◽  
Intrinsic Coercivity ◽  
Field Coefficient ◽  
Magnetic Hardening

After a short review on temperature dependence of the intrinsic coercivity in sintered Nd–Fe–B-type magnets is given, recent experimental results concerning the coercivity-anisotropy (HC–HA) correlation in B-rich Pr–Fe–B and Nd–Fe–B sintered magnets and the influence of the surface conditions of the sintered Nd–Fe–B magnets on the coercivity are reported. The results are interpreted in terms of the μoHc vs cμoHA – NIs plot, where Is is the spontaneous magnetization of R2Fe14B (R = Pr or Nd) and N is the effective demagnetization field coefficient.

Lorentz Electron Microscopy of cobalt borides in a platinum cobalt matrix

1993 ◽  
Vol 51 ◽  
pp. 1052-1053
Author(s):  
N. Qiu ◽  
J.E. Wittig
Keyword(s):  
Electron Microscopy ◽  
Magnetic Domain ◽  
Ion Milling ◽  
Magnetic Domain Wall ◽  
Hardening Mechanism ◽  
Contrast Method ◽  
Intrinsic Coercivity ◽  
Cobalt Boride ◽  
Magnetic Hardening ◽  
Thickness Measurements

The presence of cobalt borides significantly increases the intrinsic coercivity (Hic) of a Pt-Co alloy. Whereas the maximum Hic for a binary Pt-Co alloy is less than 5 kOe, a ternary Pt42Co45B13 (at%) alloy exhibits intrinsic coercivity as large as 15.2 kOe. The optimum microstructure for the maximum Hic consists of a dispersion of cobalt boride precipitates having the orthorhombic Co3B structure in an Ll0 Pt-Co matrix. Lorentz electron microscopy of the magnetic structure of these cobalt borides has been used to elucidate their strong influence on the magnetic properties of this alloy. Magnetic domain wall thickness measurements assist with modeling of the magnetic hardening mechanism.Processing the Pt42Co45B13 (at%) material utilized an initial rapid solidification step followed by annealing at 800°C. Samples for Lorentz electron microscopy were prepared by dimple grinding and ion milling to electron transparency. The Lorentz imaging employed the standard Fresnel contrast method by operating a Philips CM20T at 200 kV in the low magnification (LM) mode.

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