Study of Soft Magnetic Nickel-Iron Based Alloys Processed by Powder Injection Molding

摘要

Ni-Fe based soft-magnetic alloys, processed via Metal Injection Molding (MIM), were investigated regarding the influence of processing route on final magnetic properties and compared to fully dense cast materials. The process variations included high and low temperature debinding, different sintering routes and the application of hot isostatic pressing (HIP). The different densities resulting from the process variations were related to maximum magnetic permeability. Results have shown that density, in the range between 7,5g/cm~3 and 8,0g/cm~3, does not have significant influence on the maximum permeability, allowing cost-effective process routes. It was also verified that fully-dense cast alloys still exhibits superior properties, with lower coercive fields and higher permeability, but results achieved after HIP process overcame even the values of these commercial grade alloys.