Dynamic Mechanical Behaviour of Polymer Bonded Nd–Fe–B Composite Materials

Abstract

Magnetic composite materials with varied content of NdFeB particles in epoxy matrix are examined from a dynamic mechanical perspective. Structural, viscoelastic and magnetic properties of composites have been observed using Scanning Electron Microscope (SEM), Dynamic Mechanical Analysis (DMA) and Super Quantum Interference Device (SQUID) magnetometer, respectively. Experimental results show that magnetic properties and corresponding dynamic mechanical behaviour depend on packing density. Also, results observed by predictive mathematical models suggest that maximal packing factor has a direct impact on elastic behaviour of composites.

Nanocrystalline Nd-Fe-B Alloys for Polymer-Bonded Magnets Production

“…Optimal process parameters, particle distribution, particle shape and size, packing density, and good adhesion between Nd-Fe-B particles and a polymer matrix are all essential for structure and magnetic properties of the final composite material. Generally speaking, a packing density of composites increases with the rising Nd-Fe-B filler content in polymer matrix [14]. Alternatively, the packing density can be increased by mixing powder fractions of different particle size and size distribution.…”

“…A compression molding method, as one of the most common method for polymer composite production, is used. As the parameters of synthesis have influence on package density, mechanical and magnetic properties of final composite materials [14], this study presents how different nanostructures of starting Nd-Fe-B particles influence magnetic properties of polymer-bonded Nd-Fe-B materials.…”

Tensile strength properties of hybrid magnetic composite materials

“…The content of 10 wt.% of epoxy resin has been selected on experimental experience during previous research activities [5,7,10,11].…”

“…In recent years, high demand for miniaturization of IT products, such as smart phones and tablets, makes Nd-Fe-B bonded magnets very applicable component with great expanse of production [2]. As a very suitable magnetic material with superior magnetic properties, Nd-Fe-B bonded magnets become the focus of many research groups [3][4][5].…”