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Rochester, NY, United States

Constantinides S.,Arnold Magnetic Technologies Corporation
Materials Research Society Symposium Proceedings | Year: 2013

The 20th century saw rapid and dramatic improvements in permanent magnet materials. It has been 31 years since the discovery of neodymium-iron-boron and numerous companies and laboratories are seeking to produce a new and superior material. Topics discussed herein are material options, economics of selected materials and market drivers in material selection. Market issues include manufacturability by shape, size, and material yield; raw material supply including cost and dependability of the supply chain; raw material and magnet product price stability; development of applications based on commercial needs, government legislation and consumer demand. "Need is the mother of invention" and no discussion would be complete without covering why a new material would be beneficial from an applications point of view especially in energy production and consumption. Therefore, an introduction will be provided for select, major applications using permanent magnets and the growth forecasts for these. © 2013 Materials Research Society.

Kramer M.J.,Iowa State University | McCallum R.W.,Iowa State University | Anderson I.A.,Iowa State University | Constantinides S.,Arnold Magnetic Technologies Corporation
JOM | Year: 2012

With the advent of high-flux density permanent magnets based on rare earth elements such as neodymium (Nd) in the 1980s, permanent magnet-based electric machines had a clear performance and cost advantage over induction machines when weight and size were factors such as in hybrid electric vehicles and wind turbines. However, the advantages of the permanent magnet-based electric machines may be overshadowed by supply constraints and high prices of their key constituents, rare earth elements, which have seen nearly a 10-fold increase in price in the last 5 years and the imposition of export limits by the major producing country, China, since 2010. We outline the challenges, prospects, and pitfalls for several potential alloys that could replace Nd-based permanent magnets with more abundant and less strategically important elements. © 2012 The Author(s).

Constantinides S.,Arnold Magnetic Technologies Corporation
Advances in Powder Metallurgy and Particulate Materials - 2014, Proceedings of the 2014 World Congress on Powder Metallurgy and Particulate Materials, PM 2014 | Year: 2014

Every commercially successful permanent magnet material since 1950 has been manufactured via powder metallurgy. Furthermore, the focus of current research into new magnetic materials is based on processes that require fine particulates at one or more stages of manufacture. Such products include exchange coupled hard and soft magnetic phases, unique metallurgical structures created at the atomic level and interstitial elements that can only be diffused over short distances typical of small particles, small diameter fibers or thin sheets. While forming particulates involves well-established practices, obtaining optimized exchange coupling is proving difficult. An even greater challenge is consolidation of the nanoparticulate into bulk magnetic structures while maintaining the nano-structure and introduction and maintenance of magnetic domain alignment.

Arnold Magnetic Technologies Corporation and Flexmag Industries Inc. | Date: 2006-04-25

Flexible plastic and rubber composite magnetic sheets for commercial and industrial use.

Arnold Magnetic Technologies Corporation | Date: 2007-02-12

Decorative magnets; Magnets.

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