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Author: K. J. Kronenberg Publisher: ISBN: Category : Ferromagnetic materials Languages : en Pages : 30
Book Description
Magnets of iron, cobalt and iron-cobalt particles were made with different matrix materials. Magnets pressed from a gel of magnetic particles and mercury were used to evaluate the progress of the various phases of the process. These magnets are commonly referred to as ''mercury matrix'' magnets. In order to eliminate the mercury these magnets were distilled at high temperatures under a vacuum. This resulted in the production of porous blocks of fine particles which were either vacuum impregnated with resins or crushed, mixed with binder and repressed. Lead was added to the heat treated gel before pressing. These magnets were distilled, crushed and repressed. Magnets were made by superficially oxidizing submicron particles of iron-cobalt. Gross structure in fine particle magnets was revealed by electron micrographs.
Author: K. J. Kronenberg Publisher: ISBN: Category : Ferromagnetic materials Languages : en Pages : 30
Book Description
Magnets of iron, cobalt and iron-cobalt particles were made with different matrix materials. Magnets pressed from a gel of magnetic particles and mercury were used to evaluate the progress of the various phases of the process. These magnets are commonly referred to as ''mercury matrix'' magnets. In order to eliminate the mercury these magnets were distilled at high temperatures under a vacuum. This resulted in the production of porous blocks of fine particles which were either vacuum impregnated with resins or crushed, mixed with binder and repressed. Lead was added to the heat treated gel before pressing. These magnets were distilled, crushed and repressed. Magnets were made by superficially oxidizing submicron particles of iron-cobalt. Gross structure in fine particle magnets was revealed by electron micrographs.
Author: M. A. Bohlmann Publisher: ISBN: Category : Aluminum Languages : en Pages : 36
Book Description
Manganese-aluminum alloys with 68-73% Mn were developed for permanent magnet material. Best magnetic properties were obtained in 71% Mn alloys. Maximum energy product was 4.0 x 10 to the 6th power GOe, reached by homogenization, controlled quenching, reducing area 86% by swaging in jackets, and annealing. Process parameters were studied to fine the optima for the brittle alloy. Deformation of the alloy produces a preferred magnetic axis and raises coercive force. Swaging was best, but deforming by turning cast bars into chips on a lathe gave the best ''particle'' magnets and was easiest. A review of the crystal and magnetic structures leads to the deduction that dislocation lines involve Mn atoms arranged antiferromagnetically which subdivide larger ferromagnetic regions. The magnetic saturation is not reached in practical magnetizing field. The magnetic induction decreases with increasing temperatures to Curie point.
Author: Slawomir Wiak Publisher: Springer Science & Business Media ISBN: 1402031696 Category : Technology & Engineering Languages : en Pages : 370
Book Description
Computer Engineering in Applied Electromagnetism contains papers which were presented at the International Symposium on Electromagnetic Fields in Electrical Engineering, held in Maribor, Slovenia, 18-20 September 2003. It consists of three parts, Computational Techniques, Electromagnetic Engineering, and Special Applications. The contributions selected for the book cover a wide spectrum of theory and practice, being simultaneously of high theoretical level and deeply rooted in engineering problems. Thus, this volume touches on what is of key importance in electromagnetism.
Author: Georges Bossis Publisher: World Scientific ISBN: 9810249373 Category : Science Languages : en Pages : 906
Book Description
This book contains up-to-date information on the state of the art of research and applications in electro- and magnetorheology. A total of 130 papers are presented in four sections. The first section is devoted to the various applications of ER and MR fluids, like polishing, microfluidics, vibration control, robots, shock absorbers and dampers, MR and ER valves. The second part deals with the experimental characterization as well as the theoretical prediction of the mesostructure resulting from field-induced phase separation. The dynamics of phase separation is also included in this section. The third section is about the material properties; it includes papers on new compositions of ER or MR fluids, polymer blends, magneto- or electroactive elastomers and gels. The last section, about physical mechanisms, presents experiments and theories on the rheology of the fluids and its connection with microhydrodynamics and the structure of field-induced aggregates.
Author: John J. Croat Publisher: Woodhead Publishing ISBN: 032388640X Category : Technology & Engineering Languages : en Pages : 455
Book Description
Modern Permanent Magnets provides an update on the status and recent technical developments that have occurred in the various families of permanent magnets produced today. The book gives an overview of the key advances of permanent magnet materials that have occurred in the last twenty years. Sections cover the history of permanent magnets, their fundamental properties, an overview of the important families of permanent magnets, coatings used to protect permanent magnets and the various tests used to confirm specifications are discussed. Finally, the major applications for each family of permanent magnets and the size of the market is provided. The book also includes an Appendix that provides a Glossary of Magnetic Terms to assist the readers in better understanding the technical terms used in other chapters. This book is an ideal resource for materials scientists and engineers working in academia and industry R&D. Provides an in-depth overview of all of the important families of permanent magnets produced today Includes background information on the fundamental properties of permanent magnets, major applications of each family of permanent magnets, and advances in coatings and coating technology Reviews the fundamentals of permanent magnet design
Author: K. J. Kronenberg
Author: K. J. Kronenberg
Author: 
Author: M. A. Bohlmann
Author: Slawomir Wiak
Author: 
Author: 
Author: Georges Bossis
Author: 
Author: William SCORESBY (the Younger.)
Author: John J. Croat