ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
The effects of the coupling agent addition on the specific density and corrosion behavior of NdFeB and SmCo bonded magnets have been investigated. The application of LICA44, a titanate coupling agent, improved the filled volume of the epoxy-based bonded magnets, especially at high compression pressures. When molded at 10.5 T/cm2, specific densities of 6.2 and 6.5 g/cm3 have been obtained for the NdFeB and SmCo bonded magnets, respectively. Incorporating a coupling agent was found to eliminate visible cracks on the SmCo bonded magnets, possibly due to the improvements in the wettability and compatibility of the system. The percentage of the filled volume was increased by 2%–7%. Incorporating LICA44 also improved corrosion resistance of the bonded magnets. For NdFeB, LICA44 reduced the steady state corrosion current Icorr from 69 to 38 μA/cm2. No significant changes in the Icorr were observed for SmCo due to the stable nature of SmCo. © 1999 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.369840
