What is Permalloy?
Permalloy is an alloy primarily composed of nickel and iron. It has a high magnetic permeability that enables it to efficiently concentrate an applied magnetic field, making it one of the most commonly used materials in electrical engineering and related fields. Permalloy's valuable properties include:
Its let-go force.
Low hysteresis loss.
Good strength and stiffness at elevated temperatures.
Corrosion resistance.
Compatibility with printed circuit boards and good thermal characteristics.
It can easily be machined or formed into various shapes for applications such as relays, transformers cores and shields against EMI/RFI interference.
Applications of Permalloy
Permalloy is a ferromagnetic alloy typically composed of 80% Nickel and 20% Iron, with small additions of copper, manganese and other elements. Its high magnetic permeability and low coercive force make it useful for many applications, including shielding sensitive electronic components from electromagnetic interference (EMI), transformers in computers, motors, and TV sets, among many other electrical gadgets. One of the most common applications for permalloy is making inductors used in various radio-frequency filters and impedance-matching circuits. It can also coat flat surfaces or wire cores, providing efficient EMI shielding by attenuating external electric fields. Additionally, permalloy is often employed for core or plated wires used for microwaves due to its good conductivity, mechanical strength and softness, which makes them easy to shape into desired configurations.
Mechanical properties of Permalloy
Permalloy is an alloy of nickel and iron with high permeability and low coercivity. It has excellent corrosion resistance, mechanical properties like tensile strength and flexibility, good electrical conductivity, and strong magnetic characteristics. These features make it ideal for various applications, including electric motors, transformers, relays, switchgear, and aerospace components.
Yield strength
Tensile Strength
Elongation
Mpa
Mpa
%
980
1030
3~50
Physical properties of Permalloy
Permalloy is an alloy with a combination of nickel and iron. It has excellent magnetic properties and high electrical conductivity, making it ideal for transformers, inductors, and other components in the electrical industry. Its low hysteresis energy loss makes it suitable for applications such as loudspeakers and antennas.
Property Name
Value
Density (g/cm3)
8.6
Electrical resistivity at 20ºC(Om*mm2/m)
0.55
Coefficient of linear expansion(20ºC~200ºC)X10-6/ºC
10.3~11.5
Saturation magnetostriction coefficient λθ/ 10-6
2.0
Curie point Tc/ ºC
450
Chemical composition of Permalloy
Permalloy is an alloy of nickel and iron with a composition ratio of 80:20. It consists primarily of nickel and iron plus small amounts of copper, manganese, and other elements. The material has excellent magnetic properties such as low coercivity, high permeability, low core loss at elevated temperatures, and good core-to-core uniformity. It is widely used in transformers, sensors, relays and motors to control flux density or current flow.
What is permalloy used for?
Permalloy is used in a variety of electronic components, such as transformers, shields, and inductors. It has high permeability and low coercivity properties which make it useful for reducing core losses.
What is the material of permalloy?
Permalloy is used in various electronic components, such as transformers, shields, and inductors. Its high permeability and low coercivity properties make it useful for reducing core losses.
What is the permeability of permalloy?
Permalloy has a permeability of around 250 to 5000 and highly depends on the frequency applied.
Is permalloy a hard or soft magnetic material?
Permalloy is a soft magnetic material that readily accepts and releases magnetic field lines.