Microstructure And Coercivity Of Rare Earth Iron Permanent Magnet Materials
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Author | : Johannes Bernardi |
Publisher | : |
Total Pages | : 216 |
Release | : 1993 |
Genre | : |
ISBN | : |
Download Microstructure and Coercivity of Rare-Earth-Iron Permanent Magnet Materials Book in PDF, Epub and Kindle
Author | : Peter Skalicky |
Publisher | : |
Total Pages | : 121 |
Release | : 1986 |
Genre | : |
ISBN | : |
Download Anisotropy and Microstructure of Rare Earth Permanent Magnet Materials Book in PDF, Epub and Kindle
The present report is divided into two parts, the microstructural investigations and the anisotropy measurements of rare earth permanent magnet materials. Section I shows that the hardmagnetic properties, i.e. coercivity, of the individual Nd-Fe-B permanent magnet material strongly depends on the compositional and processing parameters (milling, blending, annealing, etc.) and are directly correlated to the microstructural properties (grain size, composition and distribution of phases, crystal defects and precipitates) and to the magnetocrystalline anisotropy of the material. By means of transmission electron microscopy together with STEM X-ray microanalysis at least three categories of phases wee identified in sintered rare earth-iron permanent magnets. From microstructural investigations it can be assumed that the coercivity of sintered rare earth-iron permanent magnet materials is controlled by the nucleation and expansion fields for reversed domains. In Section II the magnetic anisotropy measurements of various rare earth-iron based magnets between 80 K and the Curie temperature are shown and the results are discussed by means of a expanded model for the anisotropy field. From the study of the temperature dependence of the anisotropy field of the mixed crystal series (N, RE)15Fe77B8 (RE=Y, La, Ce) the One Ion Character of the Nd sublattice is shown.
Author | : TECHNISCHE UNIV VIENNA (Austria) INST OF APPLIED AND TECHNICAL PHYSICS. |
Publisher | : |
Total Pages | : 211 |
Release | : 1989 |
Genre | : |
ISBN | : |
Download Anisotropy and Microstructure of High Coercivity Rare Earth Iron Permanent Magnets, List of Papers Published Book in PDF, Epub and Kindle
Partial Contents: Temperature Dependence of Anisotropy Fields and Initial Susceptibility in R2Fe14B Compounds; Magnetic and Anisotropy Studies of Nd-Fe-B Based Permanent Magnets; The Hard Magnetic Properties of Sintered Nd-Fe-B Permanent Magnets; Magnetic Phase Transitions and Magnetic Anisotropy in Nd2Fe(14-x)Co(x)B Compounds; Investigation of the Hysteresis Loop and the Magnetic Anisotropy of Nd-Fe-B Based Permanent Magnets; Does a Co Substitution Really Improve the Temperature Dependence of Nd-Fe-B Based Permanent Magnets; Magnetic Anisotropy in the System La2Fe(14-x)Co(x)B and its Relation to the System Nd2Fe(14-x)Co(x)B; The Effect of Substitution of Al on the Magnetic Properties of Nd15Fe78B7 Permanent Magnets; Electron Microscope Study of Precipitation in a Niobium Containing (Nd, Dy)-Fe-B Sintered Magnet; Microstructural Evidence for the Magnetic Surface Hardening of Dy203-Doped N15Fe77B8 Magnets; Magnetic Anisotropy in Pr2 (Fe(1-x)COx)14B Compounds; Anisotropy and Hysteresis Studies of Highly Substituted Nd-Fe-B Based Permanent Magnets; Electron Microscopy of Nd-Fe-B Based Magnets; and The Influence of Dopants on Microstructure and Coercivity of Nd-Fe-B Sintered Magnets. (jhd).
Author | : J. M. D. Coey |
Publisher | : Oxford University Press |
Total Pages | : 562 |
Release | : 1996 |
Genre | : Science |
ISBN | : 9780198517924 |
Download Rare-earth Iron Permanent Magnets Book in PDF, Epub and Kindle
Rare-earth iron permanent magnets combine the magnetization of iron or cobalt with the anisotropy of a light rare-earth in intermetallic compounds which exhibit nearly ideal hysteresis. The rare-earth iron magnets are indispensable components in a vast range of electronic and electromechanical devices. This book covers the principles of permanent magnetism, magnet processing, and applications in a series of interlocking chapters written by experts in each area. Based on the findings of the Concerted European Action on Magnets, it is a definitive account of the field, designed to be read by physicists, materials scientists, and electrical engineers.
Author | : A.S. Nowick |
Publisher | : Elsevier |
Total Pages | : 214 |
Release | : 2012-12-02 |
Genre | : Science |
ISBN | : 0323160069 |
Download Rare Earth Permanent Magnets Book in PDF, Epub and Kindle
Rare Earth Permanent Magnets presents the discussion of the metallurgy and properties of rare earth permanent magnet alloys. The monograph initially provides the elementary aspects of magnetism to enable the reader sufficient understanding of permanent magnetism. The book then discusses the rare earth elements and their alloys with cobalt, copper, and iron; the magnetic properties of various intermetallic compounds relevant to permanent magnets; a detailed account of cast permanent magnets of the Co-Cu-Sm and Co-Cu-Ce systems and their modifications; the important methods of making and manufacturing rare earth permanent magnets by powder metallurgy methods; and comparisons between the well-known permanent magnets and the new rare earth materials. This text will be of value to students, materials engineers, and scientists.
Author | : I.R. Harris |
Publisher | : Elsevier |
Total Pages | : 144 |
Release | : 2014-04-03 |
Genre | : Science |
ISBN | : 0080983634 |
Download Rare-Earth Permanent Magnets Book in PDF, Epub and Kindle
These papers provide an interesting collection of contributions on fundamental magnetic behaviour, microstructural studies, processing methods and applications of rare earth, iron-rich, high performance permanent magnets. The remarkably versatile nature of the Nd-Fe-B-type alloys with respect to magnet processing is very evident in these proceedings. Thus there are papers which describe the production of magnets by the die-upset-forging of melt-spun ribbon, by cold-compaction of melt-spun-ribbon with soft metals, by mechanical alloying and by hot working of cast material. Work is also reported on the production of new permanent magnets from melt-spun material based on the alloys Nd4Fe78B18 and SmFe11.5Ti1.04. Both these alloys look promising and the former appears to be close to commercial exploitation.
Author | : E. A. Nesbitt |
Publisher | : Academic Press |
Total Pages | : 224 |
Release | : 1973-01-28 |
Genre | : Science |
ISBN | : |
Download Rare Earth Permanent Magnets Book in PDF, Epub and Kindle
Rare Earth Permanent Magnets presents the discussion of the metallurgy and properties of rare earth permanent magnet alloys. The monograph initially provides the elementary aspects of magnetism to enable the reader sufficient understanding of permanent magnetism. The book then discusses the rare earth elements and their alloys with cobalt, copper, and iron; the magnetic properties of various intermetallic compounds relevant to permanent magnets; a detailed account of cast permanent magnets of the Co-Cu-Sm and Co-Cu-Ce systems and their modifications; the important methods of making and manufacturing rare earth permanent magnets by powder metallurgy methods; and comparisons between the well-known permanent magnets and the new rare earth materials. This text will be of value to students, materials engineers, and scientists.
Author | : Shuming Pan |
Publisher | : Springer |
Total Pages | : 290 |
Release | : 2014-12-01 |
Genre | : Science |
ISBN | : 3642363881 |
Download Rare Earth Permanent-Magnet Alloys’ High Temperature Phase Transformation Book in PDF, Epub and Kindle
The process of high temperature phase transition of rare earth permanent-magnet alloys is revealed by photographs taken by high voltage TEM. The relationship between the formation of nanocrystal and magnetic properties is discussed in detail, which effects alloys composition and preparation process. The experiment results verified some presumptions, and were valuable for subsequent scientific research and creating new permanent-magnet alloys. The publication is intended for researchers, engineers and managers in the field of material science, metallurgy, and physics. Prof. Shuming Pan is senior engineer of Beijing General Research Institute of Non-ferrous Metal.
Author | : |
Publisher | : |
Total Pages | : 2 |
Release | : 1971 |
Genre | : |
ISBN | : |
Download Brugsbåde Book in PDF, Epub and Kindle
Author | : Ekkes H. Brück |
Publisher | : Elsevier |
Total Pages | : 216 |
Release | : 2020-11-29 |
Genre | : Technology & Engineering |
ISBN | : 0128210249 |
Download Handbook of Magnetic Materials Book in PDF, Epub and Kindle
Handbook of Magnetic Materials, Volume 29, highlights new advances in the field, with this new volume presenting interesting chapters written by an international board of authors on topics such as spin-orbit torque. Provides the authority and expertise of leading contributors from an international board of authors Presents the latest release in the Handbook of Magnetic Materials series