Karl A. Gschneidner and fellow scientists at the U.S. Department of Energy’s Ames Laboratory have created a new magnetic alloy that is an alternative to traditional rare-earth permanent magnets.
The new alloy—a potential replacement for high-performance permanent magnets found in automobile engines and wind turbines–eliminates the use of one of the scarcest and costliest rare earth elements, dysprosium, and instead uses cerium, the most abundant rare earth.
The result, an alloy of neodymium, iron and boron co-doped with cerium and cobalt, is a less expensive material with properties that are competitive with traditional sintered magnets containing dysprosium.
Experiments performed at Ames Laboratory by post-doctoral researcher Arjun Pathak, and Mahmud Khan (now at Miami University) demonstrated that the cerium-containing alloy’s intrinsic coercivity—the ability of a magnetic material to resist demagnetization—far exceeds that of dysprosium-containing magnets at high temperatures. The materials are at least 20 to 40 percent cheaper than the dysprosium-containing magnets.
“This is quite exciting result; we found that this material works better than anything out there at temperatures above 150° C,” said Gschneidner. “It’s an important consideration for high-temperature applications.”
Previous attempts to use cerium in rare-earth magnets failed because it reduces the Curie temperature—the temperature above which an alloy loses its permanent magnet properties. But the research team discovered that co-doping with cobalt allowed them to substitute cerium for dysprosium without losing desired magnetic properties.
Finding a comparable substitute material is key to reducing manufacturing reliance on dysprosium; the current demand for it far outpaces mining and recycling sources for it.
The Latest on: Magnetic material
via Google News
The Latest on: Magnetic material
- Magnetic Materials Market 2019 Global Insights and Business Scenario | Top Key Players TDK, DMEGC, VACUUMSCHMELZE, MAGNETICSon May 12, 2020 at 10:29 pm
Worldwide Market Reports has announced the addition of the Magnetic Materials Market Report 2019 2027 Production Sales And Consumption Status And Prospects Professional Research The report classifies ...
- Europe Ferrite Permanent Magnetic Material Market 2020 is Evolving Rapidly with Economic Growth, Demand, and Forthcoming Opportunitieson May 12, 2020 at 12:14 am
"The global Ferrite Permanent Magnetic Material market report offers information relating to the leading regions, competitive landscape, growth trends, and other crucial information about the growth ...
- Explainer: Why Earth’s Magnetic North Pole Is Moving Towards Siberiaon May 10, 2020 at 11:14 am
In recent years, it has been a well-known fact that Earth’s magnetic North Pole has been barreling toward Russia. But scientists were stumped in giving a reasonable explanation as to why this was ...
- 'Titanic' Shift in the Magnetic Field Results to Changing North Magnetic Pole Locationon May 8, 2020 at 7:21 am
Contrary to popular belief, the North Magnetic Pole is not settled on a fixed point. The geomagnetic poles of the earth are not fixed and are constantly changing their positions.
- AFRL: AF investigating use of quantum materials in new navigation toolon May 8, 2020 at 7:03 am
Air Force Research Laboratory researchers Drs. Robert Bedford, Luke Bissell, Chandriker Dass and Michael Slocum are finding practical applications for the curious phenomena that occur in quantum ...
- Magnetic Position Sensors Market Segmented By Types, Applications, Technology and Geography - Growth, Trends & Forecast 2020-2027on May 7, 2020 at 11:14 pm
This report presents the worldwide Magnetic Position Sensors market size (value, production and consumption), splits the breakdown (data status 2015-2020 and forecast to 2027), by manufacturers, ...
- Earth’s Magnetic North Pole Is Shifting Dramatically From A Powerful Tug Of Waron May 7, 2020 at 12:37 pm
It’s become increasingly clear in recent years that Earth’s magnetic north pole has been moving towards Russia at rather fast clip.
- Earth's North Magnetic Pole Is Heading Towards Siberia – And Scientists Now Know Whyon May 6, 2020 at 8:21 am
The North Magnetic Pole is on the run – and scientists might finally know why. It’s easy to think of Earth’s geomagnetic poles as features that are set in ...
- Scientists explain magnetic pole's wanderingson May 5, 2020 at 4:11 pm
A team, led from Leeds University, says the behaviour is explained by the competition of two magnetic "blobs" on the edge of the Earth's outer core. Changes in the flow of molten material in the ...
- Scientists produce a magnetic nanocrystal with many potential applicationson May 5, 2020 at 5:04 am
Spinels are oxides with chemical formulas of the type AB2O4, where A is a divalent metal cation (positive ion), B is a trivalent metal cation, and O is oxygen. Spinels are valued for their beauty, ...
via Bing News