Which alloys are magnetic

IEEE Trans. Bertotti, G. The Science of Hysteresis Gulf, Hubert, A. Google Scholar. Bozorth, R. Ferromagnetism Van Nostrand, Download references. Richard D. You can also search for this author in PubMed Google Scholar. Correspondence to Richard D. Reprints and Permissions. James, R. Magnetic alloys break the rules. Download citation. Published : 20 May Issue Date : 21 May Anyone you share the following link with will be able to read this content:. This means that soft magnetic materials that are used in hybrid propelled cars need to have not only excellent soft magnetic properties but also excellent strength and fatigue properties.

Partially nanocrystalline Fe-Si-B based amorphous alloys are known to exhibit excellent soft magnetic properties. Small additions of Cu and Nb facilitate the formation of an amorphous-crystalline nanocomposite microstructure upon annealing of initially amorphous precursor materials.

In this regime of nano-sized crystals, optimum soft magnetic properties including very low coercivity values and negligible saturation magnetostriction are obtained.

Recently, rapid annealing RA of amorphous Fe Such a procedure also resulted in similar nanocrystalline microstructures comparable to those of their CA counterparts. The underlying reason for obtaining such similar nanostructures, even though the annealing procedures are entirely different, is attributed to the presence of 1 at.

It was observed using atom probe tomography APT that the clustering of Cu atoms upon RA starts prior to the onset of primary crystallization, thereby, introducing chemical precursor heterogeneities in the amorphous matrix. Such local chemical heterogeneities include Fe-Si rich regions acting as nuclei which at higher annealing temperatures nucleate into DO3 structured Fe3Si nanocrystals.

In addition to the well-established Cu clustering induced heterogeneous nucleation mechanism of Fe3Si nanocrystals the recently observed chemical heterogeneity induced nucleation during RA has introduced a novel way of obtaining ultra-fine-grained nanocrystals nm with high number density. Having realized the potential of RA on nanocrystallization, we investigate in this study the role of RA on the soft magnetic Fe3Si nanocrystallization in Cu-free Fe It has been reported that the Cu-free Fe Hence the objective of this study is two-fold.

First, we explore the possibility of obtaining isolated soft-magnetic Fe3Si nanocrystals employing RA, such as observed in the case of Fe Second, the RA induced nanocrystallization process is utilized to understand the atomic-scale mechanisms during homogeneous nucleation of quenched-in Fe rich nuclei which later crystallize into DO3 structured Fe3Si nanocrystals. Welcome Search this website Useless Information about materials Why we need strong materials The Metal Men Teaching Sustainable Metallurgy Green Steel: Direct reduction of iron ore with hydrogen Green Steel: Reduction of iron ore by hydrogen plasma Sustainable steel production: Strip casting of steel What is red mud and why is it dangerous?

A modern train system known as Maglev short for magnetic levitation uses electromagnets to levitate the train above the rail. This reduces friction and allows the train to move at tremendous speed. Advanced applications of electromagnets include magnetic resonance imaging MRI machines, and particle accelerators like the Large Hadron Collider. Neodymium magnets are a type of rare-earth magnet comprised of an alloy of neodymium, iron and boron. Neodymium magnets are the strongest type of permanent magnet commercially available.

They are used when strong permanent magnets are required, particularly in cordless tool motors, hard disk drives and magnetic fasteners. Copper and manganese are not normally magnetic. However, a ground-breaking new technique, developed by Oscar Cespedes of the University of Leeds, UK, has transformed copper and manganese into magnets.

Cespedes and his team fabricated films of copper and manganese on carbon structures called Buckyballs. This new technique is set to provide a more biocompatible and environmentally-friendly way to manufacture MRI machines. Other possible applications include use in wind turbines.

Wind turbines currently use iron cobalt and nickel with rare-Earth elements. But these elements are expensive and tough to mine. The breakthrough opens the possibilities to cheaper alternatives. We are metal experts and have been providing quality customer service and products since At Metal Supermarkets, we supply a wide range of metals for a variety of applications.

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