Microanalytical investigation of sintered FE-Nd-B magnets

1986 ◽  
Vol 44 ◽  
pp. 824-825
Author(s):  
R. Ramesh ◽  
T. A. Bielicki ◽  
G. Thomas
Keyword(s):  
Electron Microscopy ◽  
Magnetic Properties ◽  
Analytical Electron Microscopy ◽  
Alloy System ◽  
Magnetic Alloy ◽  
Microstructural Investigation ◽  
Analytical Electron ◽  
Hard Magnetic Alloy

Fe-Nd-B is emerging as an important hard magnetic alloy system. The magnetic properties, in particular, the coercivity, are strongly influenced by the microstruetura1 condition of the magnet and are subject to degradation by various factors which can be understood only with the use of analytical electron microscopy. This investigation focuses on the characterization of inclusions discovered within a magnet which exhibits a kinked B-H loop.(Fig.1). Based on the microstructural investigation, an appraisal is made of the effect of these particles on the magnetic properties.

Analytical Electron Microscopy of rapidly solidified Pt-Co-B alloys

1992 ◽  
Vol 50 (1) ◽  
pp. 44-45
Author(s):  
J.E. Wittig ◽  
N. Qiu ◽  
N.D. Evans
Keyword(s):  
Electron Microscopy ◽  
Magnetic Properties ◽  
Analytical Electron Microscopy ◽  
Magnetic Behavior ◽  
Rapid Solidification Processing ◽  
Solidification Processing ◽  
Analytical Electron ◽  
Rapidly Solidified ◽  
Hard Magnetic Properties

Compared to binary Pt-Co materials, the ternary Pt42Co45B13 (at.%) alloy exhibits major improvements in hard magnetic behavior. Although rapid solidification processing (RSP) of the Pt-Co-B alloy is necessary to produce a refined distribution of the boron, this RSP condition does not constitute a strong magnetic material. To achieve the optimum hard magnetic properties requires subsequent annealing steps. Upon annealing the RSP ternary alloy, boron combines with Co to form magnetically anisotropic Coborides and the presence of boron has been observed to increase the rate of the transformation from the disordered FCC Pt-Co phase to the L1o superlattice. Understanding these phase transformations and their influence on the magnetic properties demands characterization of both the metastable RSP and annealed conditions.

scholarly journals Characterization of Magnetoliposomes by Analytical Electron Microscopy

2003 ◽  
Vol 9 (S02) ◽  
pp. 206-207
Author(s):  
Shu-You Li ◽  
Ying Guo ◽  
M. Aslam ◽  
Lei Fu ◽  
Vinayak P. Dravid
Keyword(s):  
Electron Microscopy ◽  
Analytical Electron Microscopy ◽  
Analytical Electron

Characterization of TiB2Ti(CN)Ni ceramics by transmission and analytical electron microscopy

1993 ◽  
Vol 16 (6) ◽  
pp. 317-321 ◽  
Author(s):  
J.Y. Dai ◽  
D.X. Li ◽  
H.Q. Ye ◽  
G.J. Zhang ◽  
Z.Z. Jin
Keyword(s):  
Electron Microscopy ◽  
Analytical Electron Microscopy ◽  
Analytical Electron

scholarly journals Characterization of plutonium-bearing wastes by chemical analysis and analytical electron microscopy

1995 ◽  
Author(s):  
R.G. Behrens ◽  
E.C. Buck ◽  
N.L. Dietz ◽  
J.K. Bates ◽  
E. Van Deventer ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Chemical Analysis ◽  
Analytical Electron Microscopy ◽  
Analytical Electron
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