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Cluster-Expansion Model for Complex Quinary Alloys: Application to Alnico Permanent Magnets

2017; American Physical Society; Volume: 8; Issue: 5 Linguagem: Inglês

10.1103/physrevapplied.8.054016

2331-7043

Manh Cuong Nguyen, Lin Zhou, Wei Tang, M. J. Kramer, Iver E. Anderson, Cai‐Zhuang Wang, Kai-Ming Ho,

Magnetic and transport properties of perovskites and related materials

Alnico alloy is a very promising candidate for rare-earth-free, high-performance permanent magnets, especially for high-temperature and levitation applications---including motors for electric vehicles. Engineering better magnets, and motors, is stymied by a lack of knowledge of alnico's nanoscale structure. Using advanced simulation methods, this study investigates the dependence of chemical composition and ordering of magnetic and matrix phases of alnico on annealing temperature. A surprising phase forms when the system is annealed at low temperatures, offering a possible route to improving alnico's performance.