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Preparation, Structure And Properties Of Two Types Of Magnetic Composite Materials Used For Motors

Posted on:2007-01-23Degree:DoctorType:Dissertation
Country:ChinaCandidate:J LiFull Text:PDF
GTID:1101360185994662Subject:Materials science
Abstract/Summary:PDF Full Text Request
Bonded NdFeB permanent magnetic composite materials and laminated iron powder soft magnetic composite materials have been widely used as field-generating devices and stator slot wedges in motors because of their excellent magneitc properties. However, the bonded NdFeB materials have lower permanent magnetic properties, and the laminated iron powder materials have unmatched soft magnetic properties with mechanical properties. It had great limited the application of the magnetic composite materials in the motors which develop towards high-efficiency, miniaturization and environment protection. So, it is urgent to prepare bonded NdFeB materials with high magnetic properties and laminated iron powder materials with matched magnetic and mechanical properties.The bonded NdFeB permanent magnetic composite materials and laminated iron powder were prepared by molding and laminating method, respectively. The microstructures of the magnetic composite materials were investigated by the methods of SEM, AFM, XPS, IR, XRD, etc. The magnetic, mechanical, insulating properties of the materials were measured according to related standard. Combing the results of microstructure with physical properties, the preparation process of the two composite materials were researched. The influences of some basal factors in the preparation, such as components characters, molding process, etc, on the...
Keywords/Search Tags:Bonded, NdFeB, Permanent magnetic composite material, Laminated, Iron powder, Soft magnetic composite material, Prepare, Property
PDF Full Text Request
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