Polymer bonded hard magnetic foils for MEMS applications
Bartosz Michalski, Marcin Leonowicz, Waldemar Kaszuwara
Quarterly No. 1, 2011 pages 29-33
DOI:
keywords: Nd-Fe-B magnets, polymer bonded hard magnetic foils, hard magnetic composite
abstract Resin bonded composite magnets were prepared by tape casting using various compositions of polymeric matrix and processing variables. As a magnetic component, MQ-A M30 ribbon powder was used. The magnetic and mechanical properties versus the composite’s compositions are presented and discussed. The coercivity does not depend on the amount of MQ powder and its mean value is close to 580 kA/m. The fact that the μ0Hc does not remarkably change for various specimens means that processing the composites does not cause oxidation of the metallic component, which would lead to degradation of the properties. The remanence changes from 0.43 to 0.65 T and rises with increasing MQ powder content. The mechanical properties depend mainly on the properties of the polymeric matrix. The composite foil containing 64.72% of the magnetic component appears to present the best combination of properties. The composite magnetic films will be used as permanent magnets for applications in Magnetic Micro-Actuators and Systems (MAGMAS).