Research Themes +
Energy Technologies Area (ETA) researchers are continually building on the strong scientific foundation we have developed over the past 50 years. We address the world’s most pressing climate challenges by bringing to market energy-efficient innovations across the buildings, transportation, and industrial sectors. ETA is at the forefront of developing better batteries for electric vehicles; improving the country's aging electrical grid and innovating distributed energy and storage solutions; developing grid-interactive, efficient buildings; and providing the most comprehensive market and data analysis worldwide for renewable technologies like wind and solar.
Strategic Initiatives +
The Energy Technologies Area (ETA) Strategic Plan is the guiding force for our research and development for the next ten years. It clearly charts a path toward clean-energy solutions and focuses on five detailed Strategic Initiatives. The Plan provides an in-depth look at how ETA is accelerating research to provide affordable, clean energy to all while accomplishing deep, economy-wide decarbonization, looking to avoid a rise in global average temperature while simultaneously developing solutions to increase humanity's resilience to extreme weather volatility.
Publications
News +
For media inquiries,
please contact ETA
Interim Communications Manager
Kiran Julin

kjulin@lbl.gov
About Us +
The Energy Technologies Area (ETA) is unique in translating fundamental scientific discoveries into scalable technology adoption. Our approach combines an understanding of the marketplace and the role of state and federal regulation and policies. ETA's research drives real-world, practical results that affect and improve the everyday lives of Americans and those across the globe. Saving energy and battling the Climate Crisis are key to the foundation of our research, which is driven by technoeconomic analysis and in-lab experimentation and discovery.

Improvement in intrinsic coercivity of sintered Fe-Nd-B magnets by the introduction of non-magnetic dispersoids

Publication Type

Journal Article

Authors

Ramesh, Ramamoorthy, G Thomas, B.M Ma

DOI

10.1016/0001-6160(89)90174-0

Abstract

The microstructure of Ho-substituted sintered Fe-Nd-B magnets, prepared by two different routes, has been characterized in order to understand the changes in intrinsic coercivity with Ho content. Spherical inclusions in the size range of 500 Å-l μm have been observed inside the matrix Re2Fe14B grains. Characterization by X-ray diffraction, electron microdiffraction and energy dispersive X-ray microanalysis, shows that these inclusions are f.c.c. rate earth oxides. The volume fraction of these inclusions increases with Ho content. Ho partitions preferentially into the matrix phase and no segregation of Ho to the interphase interfaces is observed. Lorentz electron microscopy experiments suggest that the inclusions in the lower end of the size distribution are capable of pinning the magnetic domain walls and hence these non-magnetic inclusions must contribute to the increase in intrinsic coercivity. © 1989.

Journal

Acta Metallurgica

Volume

Year of Publication

1989

ISSN

00016160

Notes

cited By 5

Research Areas

Ramesh Lab