Rare Earth Permanent Magnets

Rare Earth Permanent Magnets

1st Edition - January 28, 1973

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  • Author: A.S. Nowick
  • eBook ISBN: 9780323160063

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Description

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.

Table of Contents


  • Preface

    Acknowledgments

    Chapter I. Some Elementary Aspects of Magnetism

    Atomic Magnetism and Magnetic Alignment

    Magnetic Domains

    Magnetization

    Thermal Variation of Magnetization

    Magnetic Anisotropics

    Permanent Magnet Materials

    Appendix 1.1 Magnetic Units

    Appendix 1.2 Instructions for Making a Colloidal Suspension of Magnetite and Preparing Metal Surfaces for Microscopic Observation of Domains

    Appendix 1.3 Equations Used for Design of Permanent Magnets

    References

    Chapter II. The Rare Earth Elements and Their Alloys with Cobalt, Copper, and Iron

    Electronic Nature of Rare Earth Elements

    Rare Earth Alloys

    Co5R and Cu5R Phases

    Fe5R Phases

    Multicomponent A5B Phases

    Phases of Stoichiometry A17R2

    Preparation of Alloys

    References

    Chapter III. Magnetic Properties of Intermetallic Compounds Relevant to Permanent Magnets

    The Co5R Phases

    Magnetocrystalline Anisotropy

    The Co17R2 and Fe17R2 Phases

    References

    Chapter IV. Cast Permanent Magnets of the Co-Cu-Sm and Co-Cu-Ce Systems and Their Modifications

    Magnetic Properties of Alloys in the Co5Sm-Cu5Sm System

    Further Effect of Heat Treatment of Co5Sm-Cu5Sm Alloys

    Magnetic Properties of Alloys in the Co5Ce-Cu5Ce System

    Heat Treatment of the Alloy Co3.5Fe0.5CuCe

    Summary of Magnetic Properties of C04.5-XCuxFe0.5Ce

    External Field Supplied by Arc Melted Buttons

    Magnetic Properties of Cast Alloys in the Co-Cu-Fe-Ce-Sm System, Including Alloys Containing Misch Metal (MM) in Place of Ce

    Optical Metallography

    Electron Diffraction and Metallography

    Mechanism of Magnetization

    Thermal Properties

    Appendix 4.1

    References

    Chapter V. Co5R Permanent Magnets Based on Powders

    Magnetic Behavior of Powders

    Methods of Producing and Properties of Magnets

    Recapitulation

    References

    Chapter VI. Comparison of Permanent Magnet Materials

    Martensitic Magnet Steels

    Alnico Magnets

    Cunife and Cunico

    Remalloy

    Vicalloys

    Platinum-Cobalt

    yFe2O3 and Fe3O4

    Hexagonal Ferrite (Ceramic) Magnets

    Rare Earth Magnets

    References

    Author Index

    Subject Index

Product details

  • No. of pages: 214
  • Language: English
  • Copyright: © Academic Press 1973
  • Published: January 28, 1973
  • Imprint: Academic Press
  • eBook ISBN: 9780323160063

About the Author

A.S. Nowick

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