New Nd2Fe14B-based High Performance Permanent Magnets with Improved Toughness

Award Information
Agency:
Department of Defense
Branch
Navy
Amount:
$70,000.00
Award Year:
2001
Program:
STTR
Phase:
Phase I
Contract:
N00014-01-M-0246
Award Id:
53733
Agency Tracking Number:
N013-0033
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
924 Links Avenue, Landisville, PA, 17538
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
056771686
Principal Investigator:
JinfangLiu
Senior Engineer
(717) 898-2294
jfl@electronenergy.com
Business Contact:
MichaelWalmer
President
(717) 898-2294
mhw@electronenergy.com
Research Institute:
U OF DAYTON RESEARCH INSTITUTE
Sam Liu
300 College Park
Dayton, OH, 45469
(937) 229-3272
Nonprofit college or university
Abstract
A major problem that exists with Nd2Fe14B rare earth permanent magnets is brittleness, or poor toughness, that leads to low manufacturing yields, high component rejection rates, and limits the ability of the material to be shaped appropriately for specificapplications. The objective of this effort is to demonstrate the feasibility of significantly improving the toughness of sintered R2Fe14B-based magnets and obtain new sintered R2Fe14B-based magnets that can be subjected to grinding, machining, anddrilling. The magnets will maintain their high magnetic properties. The approach is primarily to improve the plasticity of the Nd-rich grain boundary phase by modifying its composition and refining the microstructure of the R2Fe14B-based magnets. Toaccomplish this, we will prepare sintered rare earth permanent magnets of the general form (Nd(1-x)REx)2(Fe(1-y)TMy)14B using standard powder metallurgy approaches. Rare earth substitutions for Nd include Dy and Pr, while transition metal substitutionsfor Fe include Cu, Ni, Ti, Nb, Co, and V. Standard powder metallurgy techniques will be employed to make sintered magnets based on the Nd2Fe14B phase. The approach to improving the toughness of the conventional sintered Nd2Fe14B-based permanent magnetsis to further improve the plasticity of the Nd-rich grain boundary phase, and refine the microstructure of the magnets.The payoff for DoD and commercial systems includes improved high performance rare earth permanent magnets with higher processing yieldsthat will significantly reduce the cost and increase the availability of complex shaped R2Fe14B magnets.

* information listed above is at the time of submission.

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