Investigation of the thermo-oxidative degradation of plastic Bonded Rare-Earth-Magnets during the injection molding process

Author

Gardocki, A.

Author_Institution

Univ. of Erlangen-Nuremberg, Erlangen, Germany

fYear

2011

fDate

28-29 Sept. 2011

Firstpage

162

Lastpage

166

Abstract

Polymer Bonded Magnets can be cost effectively produced by injection molding of polymers with magnetic fillers. Rare-Earth-fillers (RE) like NdFeB or SmCo in comparison with other permanent magnetic fillers have remarkably higher magnetic properties. Nevertheless they are very reactive and oxygen susceptible which leads to polymer degradation and filler oxidation during the processing. This paper deals with two different methods of resolution to improve the thermal and thermo-oxidative stability of rare earth filled polymers during processing: powder coating and processing under inert atmosphere.

Keywords

coating techniques; cobalt alloys; injection moulding; iron alloys; magnetic particles; neodymium alloys; oxidation; samarium alloys; thermal analysis; NdFeB; SmCo; filler oxidation; injection molding process; permanent magnetic fillers; plastic bonded rare-earth-magnets; polymer degradation; powder coating; thermo-oxidative degradation; Chemicals; Oxidation; Polymers; Injection Molding; Magnets; Polymer;

fLanguage

English

Publisher

ieee

Conference_Titel

Electric Drives Production Conference (EDPC), 2011 1st International

Conference_Location

Nuremberg

Print_ISBN

978-1-4577-1371-2

Type

conf

DOI

10.1109/EDPC.2011.6085535

Filename

6085535