Application of Rare Earth Permanent Magnet on Magnetic Abrasive Machining

2007 ◽  
Vol 336-338 ◽  
pp. 712-714
Author(s):  
Y. Chen ◽  
Dong Ying Ju
Keyword(s):  
Magnetic Material ◽  
Heat Treatment ◽  
Rare Earth ◽  
Permanent Magnet ◽  
Magnetic Energy ◽  
Processing Technology ◽  
Raw Material ◽  
Treatment Technique ◽  
Abrasive Machining ◽  
Powder Sintering

Because of the raw material elements and its purity and so on, the Nd-Fe-B permanent magnet, the strongest magnetic material, which needs artificial synthesis, can hardly be used directly. The performance of the permanent magnet has not yet been greatly developed owing to the limitation of the artificial synthesizing technology, of the powder sintering technology and that of the application. In this paper, the magnetic abrasive machining method as a new application is put forward, and from this viewpoint, are discussed the performance and the processing technology of the permanent magnet and the magnetic abrasive machining method. A sintering route combining the direction heat treatment technique to increase the magnetic energy is suggested.

scholarly journals Nanocomposite permanent magnetic materials Nd-Fe-B type: The influence of nanocomposite on magnetic properties

2005 ◽  
Vol 41 (1) ◽  
pp. 95-102 ◽  
Author(s):  
Nadezda Talijan ◽  
Jasna Stajic-Trosic ◽  
Aleksandar Grujic ◽  
Vladan Cosovic ◽  
Vladimir Menushenkov ◽  
...  
Keyword(s):  
Magnetic Material ◽  
Heat Treatment ◽  
Magnetic Properties ◽  
Permanent Magnet ◽  
Exchange Coupling ◽  
Coupling Effect ◽  
Soft Magnetic ◽  
Magnetic Phases ◽  
New Type ◽  
Permanent Magnet Materials

The influence on the magnetic properties of nanocristalline ribbons and powders has character of microstructure, between others ? the grain size volume of hard and soft magnetic phases and their distribution. Magnetic properties of ribbons and powders depend mainly on their chemical composition and parameters of their heat treatment [1]. Technology of magnets from nanocristalline ribbon consists of the following process: preparing the Nd-Fe- B alloy, preparing the ribbon, powdering of the ribbon, heat treatment of the powder and finally preparing the magnets. Nanocomposite permanent magnet materials based on Nd-Fe- B alloy with Nd low content are a new type of permanent magnetic material. The microstructure of this nanocomposite permanent magnet is composed of a mixture of magnetically soft and hard phases which provide so called exchange coupling effect.

Thermal Aging of NdFeB Compression Molded Magnets

2017 ◽  
Vol 899 ◽  
pp. 572-575
Author(s):  
Daniel Rodrigues ◽  
Gilberto Vicente Concílio ◽  
Jose Adilson de Castro ◽  
Marcos Flavio de Campos
Keyword(s):  
Heat Treatment ◽  
Magnetic Properties ◽  
Rare Earth ◽  
Room Temperature ◽  
Polymer Degradation ◽  
Raw Material ◽  
Temperature Heat ◽  
Electrical Motors ◽  
Temperature Heat Treatment ◽  
Cylindrical Samples

Compression moulded rare earth magnets are used in many applications, and one of them is in electrical motors, which can operate at temperatures as high as 150 °C. In high temperatures, oxidation and phase transformations may affect magnetic properties. Another issue to be considered is polymer degradation. In this paper cylindrical samples of a commercial ready-to-press raw material (MQPB+, Molycorp-Magnequench) were pressed to densities close to 5.50 g/cm3. These samples were cured (low temperature heat treatment) and thermal aged at 200 °C for 72 hours, under dynamic air. Physical characteristics (weight, dimensions and densities) and magnetic properties were measured at room temperature in a TCH2020 hysteresigraph (Globalmag). Degradation of magnetic properties was observed, and oxidation seems to be the main reason.

GECOR

Alloy Digest ◽  
1972 ◽  
Vol 21 (9) ◽  
Keyword(s):  
Magnetic Material ◽  
Rare Earth ◽  
Physical Properties ◽  
Magnetic Energy ◽  
Rare Earth Metals ◽  
General Electric Company ◽  
Electric Company ◽  
Energy Product ◽  
Magnet Alloy ◽  
Permanent Magnet Alloy

Abstract GECOR is a cobalt-rare earth metals permanent magnet alloy. It has the highest magnetic energy product of any commercial magnetic material. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on machining and joining. Filing Code: Co-65. Producer or source: General Electric Company, Magnetic Materials Section.

Basic Stages of Magnet Production by Fluoride Technology

2015 ◽  
Vol 1085 ◽  
pp. 209-213 ◽  
Author(s):  
Alexander S. Bujnovskij ◽  
Vladimir L. Sofronov ◽  
Victor Sachkov ◽  
Alexandra V. Anufrieva
Keyword(s):  
Magnetic Material ◽  
Rare Earth ◽  
Powder Metallurgy ◽  
Rare Earth Metals ◽  
Raw Material ◽  
Powder Metallurgy Method ◽  
Waste Processing ◽  
Elemental Fluorine ◽  
Material Production ◽  
Furnace Reduction

This paper presents the results of development of ecological low-waste “dry” fluoride technology of magnetic material production on the basis of rare-earth metals of the Nd-Fe-B-system. The physicochemical fundamentals are stated and the basic stages of the proposed technology are experimentally examined: the fluorination of raw material with elemental fluorine, the production of compact ingot alloys and addition alloys by the calcium-thermal out-of-furnace reduction of fluorides, the production of magnets with the help of the powder metallurgy method using mechanical or hydride grinding, as well as waste processing.

Anisotropy and Microstructure of Rare Earth Permanent Magnet Materials.

1984 ◽  
Author(s):  
J. Fidler ◽  
R. Groessinger ◽  
H. Kirchmayr ◽  
P. Skalicky
Keyword(s):  
Rare Earth ◽  
Permanent Magnet ◽  
Permanent Magnet Materials
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