1) Permalloy is the term for a nickel iron magnetic alloy. Generically, it refers to an alloy with about 20% iron and 80% nickel content.
2) Permalloy has a high magnetic permeability, low coercivity, near zero magnetostriction, and significant anisotropic magnetoresistance. The low magnetostriction is critical for industrial applications, where variable stresses in thin films would otherwise cause a ruinously large variation in magnetic properties.
3) Permalloy's electrical resistivity generally varies within the range of 5% depending on the strength and the direction of an applied magnetic field.
4) Permalloys typically have the face centered cubic crystal structure with a lattice constant of approximately 0.355 nm in the vicinity of a nickel concentration of 80%. Source: Wikipedia
Permalloy Alloy Grades Available from READE:
1) Grade: HyMu "80" Alloy. It is an unoriented, 80% nickel-iron-molybdenum registered trademarked alloy.
2) Grade 45 Permalloy contains 45% nickel, and 55% iron.
3) Grade: 2-81 Mo Permalloy contains 81% nickel, Balance= iron and 2% molybdenum.
4) Molybdenum Permalloy is an alloy of 81% nickel, 17% iron and 2% molybdenum.
5) Heating Permalloy containing 5% molybdenum in pure hydrogen yields Supermalloy, with even higher permeability.
6) Supermalloy is also available from READE.
7) Sendust (85% Fe, 9% Si and 6% Al) is a magnetic metal powder that was invented at Tohoku Imperial University in Sendai, Japan, around 1936 as an alternative to permalloy in inductor applications for telephone networks.
Permalloy Alloy Physical Properties Available:
1) Various Permalloy particle size powders are available from READE
2) Permalloy flake
3) Permalloy bar, wire, plate, sheet, foil, and sputtering target
Permalloy Alloy General Applications:
1) EI core, Magnetic head core, Magnetic shield case, Head case, Cassette tape magnetic shield plate , Parts for watch, Transducer, Car speedometer, Integrating watt hour meter, Magnetic sensor, Floppy disk drive, Car sensor, VTR, VTR camera, Diaphragm.
2) Permalloy is used in transformer laminations and magnetic recording head sensors. In its initial application, permalloy was wrapped around the insulated copper conductors of telecommunication cables, reducing signal distortion through improved inductive compensation of cable capacitive reactance.
3) It is widely used for fabricating the thin pieces that are laminated to form transformer cores. The proportion of nickel may range from 35 to 90 percent, depending on the properties desired, and is about 78 percent for low-power transformers.
4) Heating Permalloy containing 5 percent molybdenum in pure hydrogen yields SUPERMALLOY, with even higher permeability.
5) Supermalloy is an alloy composed of Ni (79%), Mo (5%), and Fe. It is a magnetically soft material. The resistivity of the alloy is 0.6 O·mm2/m.[1] It has an extremely high magnetic permeability and a low coercivity. Supermalloy is used in manufacturing of components of radio engineering, telephony, and telemechanics instruments. Source: Wikipedia
Permalloy Alloy Packaging:
Jars, pails, drums, multiply paper bags, bulk bags and fiberboard containers,
Permalloy Alloy TSCA (SARA Title III) Status:
Listed. For further information please call the E.P.A. at +1.202-554-1404
