Does Permalloy represent a family of nickel-iron (NiFe) alloys?

In the design of multifunctional materials, the soft magnetic alloy corehas opened up a new field for the production of magnetic circuits through the combination of various shapes and process metallurgical technology. The use of isotropic Soft Magnetic materials can effectively break through the limitations brought by two-dimensional steel laminations.

This material also allows for an insulation layer to be maintained around each particle. When the material is subjected to a variable magnetic field, the insulation prevents eddy currents from passing through the particles, thereby extending the response time. In addition to Transformer Core applications, soft magnetic alloys are also widely used in electric motors.

Powder metallurgy processes are well suited for the production of electrical and electronic parts, especially small parts that often have complex shapes and are suitable for mass production. After sintering, these parts usually meet the required tolerances, thus avoiding subsequent calibration steps. The materials used are soft magnetic materials prepared by powder metallurgy, similar to rolled products and materials such as iron, phosphorus, iron-silicon alloys and iron-stainless steels. However, in sheet components, we cannot find specific process factors related to powder metallurgy.

In order to produce the required soft magnetic parts, we need to clarify the material requirements. If a large saturation magnetization and remanence are required, powder metallurgy with pressing function is the right choice. If a small coercive force and large magnetic permeability are required, then clean materials - the characteristics of powder metallurgy (PM) - are the ideal choice.

Permalloy actually represents a family ofnickel-iron (NiFe) alloys. These alloys exhibit higher initial magnetic permeability after heat treatment than pure iron. They are usually produced in the form of thin sheets and are widely used in electronic devices and industrial fields due to their excellent soft magnetic properties.