Fabrication of Nanocrystalline Fe84.3Si4B8P3Cu0.7 Powders with High Magnetization

Abstract

With the Aim of Preparing the Raw Powders Used for Soft Magnetic Compacts Production, Nanocrystalline Soft Magnetic Powders of Fe84.3Si4B8P3Cu0.7Were Successfully Fabricated Using Crystallization by Rapid Heat-Treatment and Mechanical Ball-Milling Methods. We Investigated the Relation of the Magnetic Properties, Crystallization Degree and Heat-Treatment Condition in Salt-Bath Process. In this Study, a Fine Nanocrystalline Structure with an Extremely Number of α-Fe Grains with the Similar Size of ~ 30 nm Was Obtained. This Led to Excellent Soft Magnetic Properties, i.e., 1.85 T (197.7 emu/g) and 10 A/m for Saturation Magnetization and Coercivity, Respectively. By Controlling the Milling Time, Different Particle Size of Powder Can Be Obtained.