Permanent magnet alloy with improved high temperature performance
AssigneeIowa State University Research Foundation, Inc.
InventorsRalph McCallum, Youwen Xu, Matthew Kramer, Iver Anderson, Kevin Dennis
Life of this patent
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Abstract
A permanent magnet material is provided and includes a major phase represented by MRE2Tr14X wherein MRE comprises Y and at least one other rare earth element with Y being present as 15% or more of the MRE on an atomic basis, Tr is a transition element, and X is an element selected from the group consisting of B and C.
Claims31
A permanent magnet material at least a portion of which includes a phase represented by MRE2Tr14X wherein MRE comprises Y and at least one other rare earth element with Y being present as 15% or more of the MRE on an atomic basis, Tr is a transition element, and X is an element selected from the group consisting of B and C.
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A permanent magnet material at least a portion of which includes a phase represented by MRE2Tr14X wherein MRE comprises Y and at least one other rare earth element and wherein Y plus at least one heavy rare earth element selected from the group consisting of Dy, Er, Ho, and Tb are present as 50% or more of the MRE on an atomic basis, Tr is a transition element, and X is an element selected from the group consisting of B and C.
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Permanent magnet material, comprising:
- about 2 to about 20 atomic % Y,
- about 1 to about 20 atomic % of least one other rare earth element wherein the total rare earth content is about 3 to 21 atomic %,
- about 70 to about 96 atomic % Tr where Tr is a transition element, and
- about 0.3 to about 5 atomic % X where X is selected from the group consisting of B and C.
Permanent magnet material having a composition residing in the shaded area defined by a line extending between point A to point B, a line between point B to point C, a line between point C to point D, and a line extending from point D to point A of FIG. 18.
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Dependencies are inferred from the claim text.