international workshop on rare-earth magnets and their ... · program and ta b l eof content page...

UB/TIB Hannover

PROGRAM and TA B L Eof CONTENT

Page

Indroductory Remarks: C. Herget and K.J. Strnat XXIX

Workshop Co-Chairmen

Part I: 9th INTERNATIONAL WORKSHOP ON RARE-EARTH MAGNETS

AND THEIR APPLICATIONS

31 August - 2 September 1987

SESSION ON MAGNET CIRCUIT DESIGN: Wl

Chairmen: W. Baran, Krupp Widia GmbH, Essen, Germany/FRG

J. Simkin, Vector Fields Ltd., Osney Mead, UK

Invited Lecture

1 Numerical Calculation of Magnetic Fields Excited by Currents

and Hard Magnetic Materials 1

W. MUller

Technische Hochschule Darmstadt (Germany/FRG)

Invited Lecture

2 The Simulation of Anisotropic and Hysteretic Materials in

Magnetic Field Computations 17

H. Zijlstra

CSC-Scientific Consultancy, Eindhoven (Netherlands)

3 Theoretical Background and Numerical Computation of Incomplete

Exterior Multipole Systems with Rare-Earth Permanent Magnets 27

M. Marinescu and N. Marinescu*

Ing.-BUro fiir Magnettechnik, Frankfurt (Germany/FRG)

*Inst. fiir Theoretische Physik, Universitat Heidelberg (Germany(FRG)

4 A Finite Element Design Technique and Test Verification for a

Neodymium-Iron-Boron Permanent Magnet Machine 41

E.S. Ortoli, D. Pavlik and J.R. Repp

Westinghouse Electric Corporation R&D Center, Pittsburgh, PA (USA)

- I -

Part I - Page

Posters to Session 1

WP1.1 Design of a Permanent Magnet System for an ECR-Type Ion Source 55

W. Baran

Krupp Widia GmbH, Essen (Germany/FRG)

SESSION ON ELECTROMECHANICAL APPLICATIONS: W2

Chairmen: A. Prechtl,Siemens AG, Bad Neustadt, Germany/FRG

D. Howe, University of Sheffield (UK)

Invited Lecture

W2.1 The Potential for Nd-Fe-B in Electrical Machines 65

D. Howe, T.S. Birch and P. Gray

IG Technologies Ltd., Sheffield (UK)

W2.2 Magnetization of Rare-Earth Magnets in Steppers and Rotors

of AC Servomotors

D. Djurek

Institute of Physics, University of Zagreb (Yugoslavia)

- Paper not received -

W2.3 An Electrodynamic Braking System for Railway Vehicles Based

on an Axle-Mounted Permanent Magnet Alternator 85

D. Howe, D.M.H. Matthews, T.S. Birch, A.P. Jablonski* and N.M. Rash*

University of Sheffield (UK)

*The Railway Technical Center, Derby (UK)

W2.4 Paper omitted

W2.5 New Design of Rotor for Permanent-Magnet Machine 93

Xing-ye Tang

Southwest Institute of Applied Magnetics, Mianyang, Sichuan (China)


WP2.1 Design Analysis of Rare-Earth Magnet Electrical Machines and

their Inverters

Hong Gu and Zhonhua Liang

Shenyang Polytechnic University (China)


Part I - Page

.2 A New Type of Electromagnet Biased by Permanent Magnets 101

Xing-ye Tang


SESSION ON MAGNET GUIDANCE APPLICATIONS: W3

Chairmen: D. Weinmann, Ugimag Recoma AG, Lupfig, Switzerland

R. Pauthenet, Laboratoire Louis Neel, Grenoble, France

Invited Lecture

1 Spectral Characteristics and Design of Wigglers and Undulators

W. Gudat

Institut fiir Festkbrperforschung der KFA JUlich (Germany/FRG)


2 A Catalogue of Novel Permanent-Magnet Field Sources 109

H.A. Leupold, E. Potenziani II and J.P. Clarke

US Army Electronics Technology and Devices Laboratory,

Ft. Monmouth, NJ (USA)

3 A Periodic Magnets for Free Electron Devices 125

Lirong Kuang, Ailing Peng, Jison Zhang and Oian Liu


4 A Comparison of Temperature Compensation in S1T1CQ5 and RE2(TM)i;

as Measured in a Permeameter, a Traveling Wave Tube and an

Inertial Device over the Temperature Range of -60° TO 200°C 131

M.S. Walmer

Electron Energy Corporation, Landisville, PA (USA)

5 Permanent Magnet Devices for Plasma Etching Machines 141

J.-P. Yonnet and A. Picard*

Laboratoire d'Electrotechnique de Grenoble, St. Martin d'Heres (France)

*AET-Addax, ZA ?r& Milliet, Montbonnot (France)

- Ill -

Part I - Page


WP3.1 Permanent Magnet Field Sources Derived from the "Magic Rin9" Concept 149

E. Potenziani II and H.A. Leupold

US Army Electronics Technology and Devices Laboratory.

Ft. Monmouth, NJ (USA)

WP3.2 Radiation and Temperature Effects on Sm-Co and NdFeB Magnets

in Low Permeance Configurations"7

A.F. Zeller and J.A. Nolen

Michigan State University, East Lansing, MI (USA)

SESSION ON MAGNETOMECHANICAL APPLICATIONS: W4

Chairmen: K.-D. Hubner, Thyssen Edelstahlwerke AG, Dortmund, Germany/FRG

F.J. Friedlander, Purdue University, West Lafayette, IN (USA)

Invited Lecture

W4.1 Application of Rare-Earth Magnets for the Magnetic Support and

Propulsion of Guided Transport Systems

H.W. Himmel

Magnetbahn GmbH, Starnberg (Germany/FRG)


Invited Lecture

W4.2 New Rare-Earth Permanent Magnet Structure for Producing Optimal

Magnetic Fields in Magnetic Separation Devices,

Comparison with Previous Systems163

M. Marinescu, N. Marinescu* and H. Unkelbach**

Ing.-Buro fdr Magnettechnik, Frankfurt (Germany/FRG)

*Inst. fur Theoretische Physik, Universitat Heidelberg (Germany/FRG)

**KHD Humboldt wedag, Kdln (Germany/FRG)

W4.3 Pre-Clinical Performance of a Magnetically-Actuated,

Implantable Artificial Heart 181

S.G. Kovacs, M.S. Sweeney, L.E. Ondrovic and R.G. Connar

University of South Florida, Tampa, FL (USA)

Part 1 - Page

W4.4 Rare Earth Magnets in Instruments with Free Magnetic Suspension 193

Th. Gast, G. Luce

Technische Universitat Berlin (Germany/FRG)


WP4.1 Magnetic Circuit Design of a Drum-Type Magnetic Separator with

Rare-Earth Permanent Magnets 199

Ligong Ding, Fuxiang Zhang and Yongfeng Zhai

China National Factory No 8272, Jilin (China)

WP4.2 Magnetic Circuit Design of a Rare-Earth Permanent Magnet Bearing 205

Ligong Ding, Fuxiang Zhang and Chunji Xu

China National Factory No 8272, Jilin (China)

WP4.3 Application of Rare Earth Permanent Magnets to Design

an Effective Tailless Intrauterine Contraceptive Device 213

B.R. Livesay, J.W. Larsen and H.J. Tatum*

Georgia Tech Research Institute, Atlanta, GA (USA)

*Emory University, Dept. GYN/OB, Atlante, GA (USA)

WP4.4 Permanent Magnet Couplings

J.-P. Yonnet

Laboratoire d'Electrotechnique de Grenoble ENSIEG,

St. Martin d'Heres (France)


WP4.5 Paper omitted

WP4.6 Powerful Magnetic Pump Used for High Pressure Vessels 221

Li Gon-Kun, Zhao Ke-Zhong, Zhang Xing-Quan, Liu Ming Hut,

Yang Kun-Yuan

Lanzhou Institute of Physics, Lanzhou (China)

. V -

Part I - Page

SESSION ON MAGNET PROCESSING TECHNOLOGY: W5

Chairmen: W. Ervens, Krupp Widia GmbH, Essen, Germany/FRG

H. Lemaire, Aimants Ugimag, St. Pierre d'Allevard, France

Invited Lecture

W5.1 Overview of Rare-Earth Magnet Processing Technology 233

M.A. Bohlmann

IG Technologies, Inc., Valparaiso, IN (USA)

W5.2 The Potential of the HD-Process in Permanent Magnet Production 249

I.R. Harris

University of Birmingham, Edgbaston (UK)

W5.3 The Influence of Nd-Fe-B Alloy Hydrogen Absorption on

Permanent Magnet Production 267

U.D.Scholz, W.E. Krbnert and H. Nagel

Thyssen Edelstahlwerke AG, Dortmund (Germany/FRG)

W5.4 The Production of Nd-Fe-B Permanent Magnets by a Hydrogen

Decrepitation/Jet Milling Process 275

E. Rozendaal, J. Ormerod, P.J. McGuiness* and I.R. Harris*

Mullards Southport, Merseyside (UK)

University of Birmingham, Edgbaston (UK)

W5.5 Hydrogen Atmosphere Sintering of Nd-Fe-B

T. Takeshita, R. Nakayama, K. Morimoto and H. Watanabe

Mitsubishi Metal Corporation, Nankai (Japan)



WP5.1 Hot Isostatic Pressing of a Smz^n Type Magnet Alloy 287

S.E. Hsu, K.L. Wang, T.I. Hou, D.S. Tsai and T.S. Chin

Materials R&D Center, Chung Shan, Inst, of Sci. and Tech.

Lung-Tang, Taiwan (China)

Department of Materials Eng., National Cheng Kung University,

Tainan, Taiwan (China)

Part I - Page

WP5.2 Magnetic Measurements in Rapidly-Quenched and Hot Pressed

Nd-Fe-B Alloys 295

P.B. Gwan, J.P. Scully, D. Bingham, J.S. Cook, R.K. Day, J.B. Dunlop

and R.G. Heydon

CSIRO, Division of Applied Physics, Lindfield (Australia)

WP5.3 Texture Formation in a Rapidly Quenched Nd-Fe-B Alloy During

Hot Pressing

Yang Luo and Ning Zhang

Central Iron and Steel Research Institute, Beijing (China)


WP5.4 Formation of Nd-Fe-B by Mechanical Alloying 301

L. Schultz and J. Wecker

Siemens AG, Erlangen (Germany/FRG)

WPS.5 Magnetic and Corrosion Properties of Mechanical Alloyed Nd2Fei4B

with a Rare Earth Hydride 311

R. van Mens, G.W. Turk and M. Brouha

Philips Research Laboratories, Eindhoven (Netherlands)

WP5.6 Radially Oriented Toroids of Nd-Fe-B Permanent Magnets

Wei Li, Long Jiang and Jinghan Zhu



WP5.7 Rare Earth Permanent Magnets with Convergent Orientation 317

Z. Blazek, V. Landa and P. Novak

National Research Institute for Materials, SVUM, Prague

(Czechoslovakia)

Part I - Page

SESSION ON RARE-EARTH SOURCES AND METALLURGY

PANEL ON RAW MATERIALS AVAILABILITY AND ECONOMICS: W6

Chairmen: C. Herget, Th. Goldschmidt AG, Essen, Germany/FRG

P. Falconnet, Rhone-Poulenc MineYale Fine, Paris, France

Invited Lecture

W6.1 Overview of the Supply of Rare Earth Raw Materials for"tne

Magnet Industrie

J. Chegwidden

Roskill Information Services, Ltd., London (UK)

-211

Invited Lecture

W6.2 Overview Presentation of the Metallurgical Processes Involved

in Making the Rare Earth-Transition Metal Alloys'537

F.G. Jones

F.G. Jones Associates Ltd., Alma, MI (USA)

W6.3 The Economic Impact of Neodymium-Iron-Boron Magnets J25

P.G. Boswell and T. Renko

Battelle Europe, Geneva (Switzerland)

W6.4 Panel On Rare-Earth Raw Materials and Alloys Availability

and Production

P. Falconnet, C. Herget and representatives from the

rare-earth industry


WP6.1 The Preparation of Neodymi um Metal for Nd-Fe-B magnets 325

Li Zuoshun, Yang Guanglu and Li Zongang

General Research Institute for Non-Ferrous Metals, Bei jing (China)

WP6.2 An Investigation of the R-D Process for the Production of SmCo5

Powder by a Response Surface Method 331

Huo-Wang Hsi, Yen-Wu Miao and Jiin-Shiung Horng

Institute of Nuclear Energy Research, Lung-Tan, Taiwan (China)

WP6.3 Reduction-Diffusion Preparation of Alloy Powders Based on

Nd-Fe-B and Magnets Made thereof 339

S.X. Zhou, D. Li and R.J. Shuai


Part I - Page

WP6.4 Nd-Fe-B Type Magnets Produced by the R-D Process

G. Sun, Y. Xiao, S. Zhou, S. Liu, M. Zhang and B. Qiu

Beijing University of Iron and Steel Technology, Beijing (China)


WP6.5 The Study on Oxygen Content in Preparing SmCos Magnetic

Powder by R-D Process 347

Huo-Wang Hsi, Yen-Wu Miao, Jiin-Shiung Horng

Institute of Nuclear Energy Research, Lung-Tan, Taiwan (China)

WP6.6 Corrosion Resistance of Cobalt-Containing Nd-Fe-B Magnets 355

K. Ohashi, Y. Tawara, T. Yokoyama and N. Kobayashi

Shin-Etsu Chemical Co. Ltd., Takefu (Japan)

WP6.7 The Electrochemical Behavior of Rare-Earth Magnets

T.S. Chin, Z.T. Chang, D.S. Tsai, W.T. Tsai and Y.H. Chang

National Cheng Kung University, Tainan, Taiwan (China)


SESSION ON R-Co MATERIALS: W7

Chairmen: H. Nagel, Thyssen Edelstahlwerke AG, Dortmund, Germany/FRG

K.O. Strnat, University of Dayton, OH, USA

Invited Lecture

W7.1 The Development and Processing of Rare Earth-Cobalt Permanent Magnets

H.K. Bayley, A. Hall, E. Rozendaal and J. Ormerod

Mullard Magnetic Components, Southport (UK)


W7.2 Effect of Zr on the Phase Equilibria and Magnetic Characteristics

of the Sm-Co Base Alloys 363

C.H. Allibert, S. Derkaoui, F. Delannay* and J. Laforest**

LTPCM - INPG, St. Martin d'Heres (France)

University Catholique de Louvain, Louvain la Neuve (Belgium)

**Laboratoire L. N^el, CNRS, Grenoble (France)

- IX -

Part I - Page

W7.3 Mbssbauer Studies of Sm(Co,Cu,Fe,Zr)7.4 Permanent Magnet 373

Ma Ruzhang, L1 Zhengwen, Ping Jueyun, Feng Yongrong and Pan Shuming*

Beijing University of Iron and Steel Technology (China)

Central Research Institute of Non-Ferrous Metals, Beijing (China)

W7.4 Microprobe Investigations of the Surface of Sintered 2 : 17

Rare Earth Permanent Magnets 379

P. Labulle and H. Lemaire*

UA CNRS, Mont-Saint-Aignan (France)

Aimants UGIMAG S.A., St. Pierre d'Allevard (France)

W7.5 Metallurgical and Magnetic Properties of Iron-Enriched

Ce-Co-Fe-Cu-Zr Magnets 387

Y. Tawara, K. Ohashi, K. Uesaka and H. Nagata

Shin-Etsu Chemical Co.Ltd., Takefu (Japan)


WP7.1 Compositional and Structural Analysis of the Cellular Microstructure

Development in 2:17 Type Permanent Magnet Alloys by Analytical

Electron Microscopy

B. Zhang*, J.R. Blachere*. W.A. Soffa* and A.E. Ray**

*Dept. of Mat'ls Sci. and Eng., University of Pittsburgh,

Pittsburgh, PA, (USA)

University of Dayton Research Inst., Dayton, OH (USA)


WP7.2 A Revised Model for the Metallurgical Behavior of 2:17 Type

Permanent Magnet Alloys

A.E. Ray*, W.A. Soffa**, J.R. Blachere** and B. Zhang**

University of Dayton Research Inst., Dayton, OH (USA)

**University of Pittsburgh, Pittsburgh, PA (USA)


WP7.3 Variation in Coercivlty During Annealing Treatment of 2-17 Magnets 395

Sun Daku, Wang Xiaosong, Y1 Quanrui and Jin Xlugang


Part I - pageWP7.4 Coercivity, Structure and Domain Patterns in Ce.7Sm.3TMg.67

Magnets Corresponding to Different Annealing Processes 401

Chen Hongbing, Shao Yuqing and Zahn Yaping

Guilin Electrical Apparatus Scientific Research Inst., Guilin (China)

WP7.5 Temperature Compensated Smi_xGdx (Co,Cu,Fe,Zr)7.4 Permanent Magnets 411

Wang Jiahai, Chang Ke

Baotou Research Institute of Rare Earth, Baotou (China)

WP7.6 Paper omitted

WP7.7 Magnetic Properties of Unoriented S111C05, Sm2(TM)i7 and Nd-Fe-B

over the Temperature Range of -60°C to 200°C 415

Kuan Hua Lee and M.S. Walmer

Electron Energy Corporation, Landisville, PA (USA)

WP7.8 Paper omitted

WP7.9 Paper omitted

WP7.10 High Coercivities in SmCo5-xNix Alloys with Different Degree

of Disorder

6.C. Hadjipanayis and A. Nazareth

Kansas State University, Manhattan, KS (USA)


WP7.11 Controlling the Quality and Magnetic Properties of the

Co-Gd-Sm System, Using a Fast In-Process X.R.F. Analysis 423

R. W. Ribitch

Hitachi Magnetics Corporation, Edmore, MI (USA)

WP7.12 The Ageing Characteristics of a 2/17 Alloy; Coercivity Microhardness

and Electrical Resistance Measurements 435

T. Bailey and I.R. Harris

University of Birmingham, Birmingham (UK)

WP7.13 Effect of Boron Additions on Magnetic Properties of

Sm(Co,Cu,Fe,Zr)z Permanent Magnets 445

T. Mukai, T. Fujimoto and F. Matsumoto

R&D Labs.-I, Nippon Steel Corporation, Kawasaki (Japan)

- XI -

Part I - Page

SESSION ON R-FE-B MATERIALS I: W8

Chairmen: W. Rodewald, Vacuumschmelze GmbH, Hanau, Germany/FRG

M. Sagawa, Sumitomo Special Metals Co., Osaka, Japan

Invited Lecture

1 Physico-Chemical Properties of Ternary Rare Earth Base

Alloys and their Relation to Permanent Magnet Applications 453

Relation to Permanent Magnet Applications

K.H.J. Buschow

Philips Research Laboratories, Eindhoven (Netherlands)

2 Effect of Minor Alloying Substituents (Nb.Ti.Zr) on the

Temperature Dependence of the Permanent Magnet Properties

of Sintered (Nd,Dy)-(Fe,Co)-B 467

Y. Xiao, K.J. Strnat, H.F. Mildrum and A.E. Ray

University of Dayton, Dayton, OH (USA)

3 Thermal Stability of Nd-Fe-B Sintered Magnets 477

M. Tokunaga, M. Endoh and H. Harada

Hitachi Metals Ltd., Kuroagaya (Japan)

4 Magnetic Properties of Rapidly Quenched Nd-Fe-Co-B 485

J. Wecker and L. Schultz

Siemens AG, Erlangen (Germany/FRG)

5 Magnetic Properties of Rapidly Quenched Nd-Fe-T-B

(T=Zr, Nb) Magnets 495

T. Yoneyama, 0. Kohmoto and K. Yajima

TDK Co., Ltd., R&D Center, Ichikawa (Japan)

SESSION ON R-FE-B MATERIALS II: W8 (Continued)

6 Temperature Characteristics of some Types of Nd-Fe-B Magnets 503

Li Wei, Jiang Long, Zhang Jian and Zhu Jinghan


7 Coercivity and Thermal Treatment of Sintered Nd-Fe-B Magnets 511

D. Eckert, J. Schneider, 0. Hinz and A. Handstein

ZFW, AdW der DDR, Dresden (Germany/GDR)

Part I - PageW8.8 High Coercivity and High Curie Temperature Nd-Fe-Co-Al-B

Permanent Magnet 5ig

Pan Shuming, Ying Qiming, Li Dongpei, Zhao Ju, Ren Shikuan,

Zhang Jian, Li Zhengwen*, Ping Jueyun* and Ma Ruzhang

General Research Institute of Non-Ferrous Metals, Beijing (China)


W8.9 Structure and Magnetic Properties of Co-Rich Pr-Co-B Alloys 527

Y.C. Chuang, C.H. Wu, T.D. Chang, F.H. Wang, F.R. de Boer*

Institute of Metal Research, Shenyang (China)

University of Amsterdam, Amsterdam (Netherlands)

W8.10 The Effect of Surface Oxidation on the Demagnetization

Curve of Sintered Nd-Fe-B Permanent Magnets 537

R. Blank and E. Adler

Vacuumschmelze GmbH, Hanau (Germany/FRG)


WP8.1 NdFeB Magnets Having a (100) Fiber Texture 545

B.M. Ma, R.F. Krause and V.K. Chandhok

Crucible Research Center, Pittsburgh, PA (USA)

WPS.2 Paper omitted

WP8.3 Preparation of High Coercivity Magnets Based on the Nd-Fe-B System 553

L.C. Su, K.L. Wang and S.E. Hsu

Materials R&D Center, Chung Shan Institute of Science

and Technology, Lungtan, Taiwan (China)

WP8.4 (Nd-Pr-MM)-Fe-B Permanent Magnet Alloys 561

Yong Wan, Ping Wu, Yugin Jin and Yanru Gu

Beijing Metallurgical Research Institute, Beijing (China)

WP8.5 NdFeB Magnet with Low Temperature Coefficient 569

Xie Hongzu, Zhang Jin, Yang Meijuan and Guo Binglin

Baotou Rare Earth Research Institute, Baotou (China)

WP8.6 The Magnetic Properties of La Substituted Nd-Fe-B Magnets 574

Tang Weizhong, Zhou Shouzeng and Wang Run


- XIII -

Part I - Page

WP8.7 Study of Permanent-Magnetic Nd-Fe-Co-B Alloys by Mbssbauer Effect 583

Ma Ruzhang, Li Zhengwen, Ping Jueyun, Xu Yingfan and Pan Shuming*


Central Research Institute of Non-Ferrous Metals, Beijing (China)

WP8.8 The Coercivity and Anisotropy of (Nd,X)-(Fe,Y)-B (X=Dy, and Y=Co,Al)

Based Permanent Magnets 593

R. Grdssinger, A. Keresztes, H. Harada* and Z. Shougong**

Technische Universit'a't Wien, Vienna (Austria)

*Hitachi Metals Ltd. (Japan)

**Inst. of Physics, Chinese Academy of Science, Beijing (China)

WP8.9 Microstructures and Magnetic Properties of Sintered Nd-Dy-Fe-B Magnets

B.M. Ma and R.F. Krause

Crucible Research Center, Pittsburg, PA (USA)

- see SP1.16, Part II, Page 141

WP8.10 Sintered Nd-Fe-B Magnets Containing Co and Al with Improved

Temperature Stability

J. Xue*, Y. Xiao** and S. Liu**


**University of Dayton, Dayton, OH (USA)


WP8.11 The Effects of Alloy Additions to Sintered Nd-Fe-B

S.M. Bond

SG Magnetics Ltd., Ferry Lane (UK)


WP8.12 Magnetic Properties of Sintered Ndi6(FeioO-xA1x)76B6 Magnets 601

A. Handstein, J. Schneider, U. Heinecke*, R. Grdssinger**

and Shou-Gong Zhang***

ZFW, AdW der DDR, Dresden (Germany/GDR)

Hochschule fur Verkehrswesen, Dresden (Germany/GDR)

**Institut fiir Experimentalphysik, TU Wien, Vienna (Austria)

***Institute of Physics, Chinese Academy of Science, Beijing (China)

- XIV -

Part I - Page

WP8.13 Study of Aluminium in Nd-Fe-B Permanent MagnetsG.X. Mei, Q.X. Rong, Z.J. Qin and Z.S. Zeng

Shanghai Iron and Steel Research Institute, Shanghai (China)- Paper not received -

WP8.14 Magnetic Properties of Sintered Nd-Fe-Al-B Magnets 609

W. Rodewald

Vacuumschmelze GmbH, Hanau (Germany/FRG)

WP8.15 Structure and Magnetic Properties of R2CM,Ni)i4B

Pseudo-ternary Compounds (R== Nd, Pr; M= Fe, Co) 617

Y.C. Chuang, C.H. Wu and J.Q. Xie


WP8.16 Structure and Magnetic Properties of some Nd-Fe-B Alloys 635

Y.C. Chuang, C.H. Wu, Y.C. Chang, L. Kao and F.R. de Boer*


*University of Amsterdam, Amsterdam (Netherlands)

WP8.17 Measurement of Curie Temperature for Nd-Fe-B Permanent Magnets

at Low Magnetic Field 645

Xue Ronghua and Lu Quan

Department of Physics, Nanjing University, Nanjing (China)

WP8.18 Effect of Sintering Atmospheres on Nd-Fe-B Magnets

T. Takeshita

Mitsubishi Metal Co., Omiya (Japan)


WP8.19 Heat Treatment Experiments with Nd-Dy-Fe-B Alloys

J. Hole, S. Besenicar, V. Krasevec and D. Kolar

University of Ljubljana, Ljubljana (Yugoslavia)


- XV -

Part I - Page

SESSION ON R-FE-B MATERIALS III AND ON BONDED R-T MAGNETS: W9

Chairmen: R. Cremer, Vacuumschmelze GmbH, Hanau, Germany/FRG

I.R. Harris, University of Birmingham, UK

Invited Lecture

1 Current Sitution of Bonded Rare Earth Magnets in Japan

Tatsuya Shimoda 651

Seiko-Epson Corporation, Suwa-shi Nagano-ken (Japan)

2 Current Status of Thermoplastic and Elastomer Bonded

Neodymium-Iron-Boron Magnets 667

D.M. Hopstock

Electrical Products Laboratory, St. Paul, MN (USA)

3 Rare Earth Permanent Magnets with a Soft-Metal 1 Matrix for Use

in Millimeter/Microwave Tube Focusing Stacks 675

R.M.W. Strnat, M. Doser* and J.P. Clarke**

KJS Associates, Dayton, OH (USA)

*Hitach1 Magnetics Corporation, Edmore, MI (USA)

**U.S. Army ET&DL, Ft. Monmouth, NJ (USA)

4 Origin of High Coercivities in R-Fe-B Powders,

Melt-Spun Ribbons and Sintered Magnets

G.C. Hadjipanayis and A. Kim*

Kansas State University, Manhatten, KS (USA)

*IG Technolgies, Valparaiso, IN, USA


5 A Sm-Co Magnet Bonded with Liquid Crystal Polymer 683

M. Hamano

MG Company Ltd., Mlyagi (Japan)

6 The Development and Processing of Bonded Nd-Fe-B Magnets

S.M. Bond

SG Magnetics Limited, Ferry Lane (USA)


- XVT -

Part I - Page

Poster to Session 9

WP9.1 FIM-Atom Probe Investigations and Magnetic Properties of Melt

Spun Nd-Fe-B 691

A. HUtten and J. Wecker*

Institut fur Metallphysik, Universltat GSttingen (Germany/FRG)

Siemens AG, Research Laboratories, Erlangen (Germany/FRG)

WP9.2 Paper omitted

WP9.3 Magnetic Properties of R2Fei4_xSixB (R = Y,Nd) Compounds 701

M. Jurczyk, A. Kowalczyk and A. Wrzeciono

Institute of Molecular Physics, Polish Academy of Sciences,

Poznan (Poland)

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