Abstract
Metal injection molding(MIM)process is hoped to be one of processing for required to more complicated parts of magnetic components.
In this study, the effect of different types of powders(prealloyed and mixed elemental powders)on the magnetic properties of permalloy(Fe-50mass%Ni)through the MIM technique was investigated. Approximately 94% of theoretical density was obtained by using the prealloyed powder, and the retained carbon and oxygen contents were controlled to be low. On the other hand, 96% of theoretical density was obtained by using the mixed elemental powder, but the magnetic properties were inferior to that of prealloyed powder's because of high retaind oxygen content. By using the carbonyl Fe powder with high carbon, the retained oxygen and carbon content could be controlled to be low, resulting in the improved magnetic properties.
