ABSTRACT
The magnetic material is the paramount player in the design of magnetic components. The magnetics design engineer has three standard words when making the normal design trade-off study: cost, size, and performance. Silicon steel was one of the first alloys to be used in transformers and inductors. Silicon steel offers high saturation flux density, a relatively good permeability at high flux density, and a moderate loss at audio frequency. High permeability metal alloys are based primarily on the nickel-iron system. The first synthesis of a metallic glass drawing wide attention among material scientists, occurred in 1960. Klement, Willens and Duwez reported that a liquid, AuSi alloy, when rapidly quenched to liquid nitrogen temperature, would form an amorphous solid. The development of compressed iron powder cores as a magnetic material for inductance coils, stemmed from efforts of Bell Telephone Laboratory engineers to find a substitute for fine iron-wire cores.
