Thermenol

Thermenol

 

a soft magnetic iron-base alloy containing 15–16 percent Al and 3.3 percent Mo. Developed in the United States during the mid-1950’s, Thermenol typically has an initial magnetic permeability of up to 7,000, a maximum magnetic permeability of up to 130,000, and a coercive force of 1.0–1.5 amperes per m. The alloy is characterized by its high resistivity [(1.5–1.6) × 10–6 ohm·m], low density (~6,500 kg/m3), resistance to corrosion, and strength at high temperatures. Articles being made from Thermenol are subjected to a rapid cooling from a temperature of 600°C in order to inhibit the process of structural ordering that impairs the magnetic properties. Alloys of the Thermenol type are used to make cores of recording heads in tape recorders.

REFERENCE

Heck, K. Magnitnye materialy i ikh tekhnicheskoe primenenie. Moscow, 1973. (Translated from German.)