Modelling the Crystallization Reactions of Amorphous Precursors in Fe3B/Nd2Fe14B Nanocomposite Magnets

Vanalysa Ly; Stéphane Gorsse; Kiyonori Suzuki; Christopher R. Hutchinson

doi:10.4028/www.scientific.net/MSF.654-656.1166

Paper Titles

Investigation on the Plasma-Induced Electron Emission Properties of ZnO Nanorod and Carbon Nanotube Arrays
p.1150

The Characterization and Gas Sensing Properties of Polythiophene Coated V₂O₅ Nanotubes
p.1154

Current Steps in Poly(3-Hexylthiophene)/ZnO Nanobelt Hybrid Diodes
p.1158

Mechanical Properties of Electrodeposited Ni-SiO₂ Nanocomposite
p.1162

Modelling the Crystallization Reactions of Amorphous Precursors in Fe₃B/Nd₂Fe₁₄B Nanocomposite Magnets
p.1166

New Crystallographic Textures of Nd₂Fe₁₄B/α-Fe Nanocomposite Materials Prepared by Controlled Melt Spinning
p.1170

Effect of Organic Capping on the Magnetic Properties of Au Nanoparticles
p.1174

The Electrical Characterization of Single ZnO Nanowries Field-Effect Transistors
p.1178

Preparation of Photoluminescent Silicon Nanowires Based on Multicrystalline Silicon Wafers
p.1182

HomeMaterials Science ForumMaterials Science Forum Vols. 654-656Modelling the Crystallization Reactions of...

Modelling the Crystallization Reactions of Amorphous Precursors in Fe₃B/Nd₂Fe₁₄B Nanocomposite Magnets

Abstract:

A physically-based model is proposed for the competitive precipitation of multiple phases (bcc-Fe, Fe3B, Nd2Fe14B, Nd2Fe23B3, NdFe4B4 and Fe2B) from an amorphous Fe-B-Nd matrix. These materials form the basis of a class of nanocomposite hard magnets. The nucleation and growth of the different phases are calculated using computational thermodynamics and kinetics tools with input from a thermodynamic assessment of this system. In some alloy compositions, the phase formation sequence during crystallization shows significant sensitivity to the heating-rate. Model calculations illustrate that this effect cannot be explained by homogeneous nucleation and growth of the phases. The possible role of heterogeneous nucleation is briefly discussed.