Composite article with magnetocalorically active material and method for its production
First Claim
Patent Images
1. A composite article, comprising:
- (a) a solid matrix comprising a magnetocalorically passive material and having a microstructure comprising a plurality of particles of magnetocalorically passive material that have lattice structure that exhibits strain, or fractures, or both, from compression, and that, at least in part, touch one or more immediately neighboring particles of magnetocalorically passive material; and
(b) a plurality of solid inclusions comprising a magnetocalorically active material at least partially embedded in the solid matrix, wherein the inclusions either;
(1) have a microstructure comprising a plurality of particles of magnetocalorically active material that have lattice structure that exhibits strain, or fractures, or both from compression, and that, at least in part, touch one or more immediately neighboring particles of magnetocalorically passive material, or(2) form a series of foils, flakes, or tapes embedded in the matrix.
3 Assignments
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Accused Products
Abstract
A composite article (1; 10; 40) comprises a plurality of inclusions (5) of a magnetocalorically active material embedded in a matrix (4) of a magnetocalorically passive material. The inclusions (5) and the matrix (4) have a microstructure characteristic of a compacted powder.
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Citations
34 Claims
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1. A composite article, comprising:
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(a) a solid matrix comprising a magnetocalorically passive material and having a microstructure comprising a plurality of particles of magnetocalorically passive material that have lattice structure that exhibits strain, or fractures, or both, from compression, and that, at least in part, touch one or more immediately neighboring particles of magnetocalorically passive material; and (b) a plurality of solid inclusions comprising a magnetocalorically active material at least partially embedded in the solid matrix, wherein the inclusions either; (1) have a microstructure comprising a plurality of particles of magnetocalorically active material that have lattice structure that exhibits strain, or fractures, or both from compression, and that, at least in part, touch one or more immediately neighboring particles of magnetocalorically passive material, or (2) form a series of foils, flakes, or tapes embedded in the matrix. - View Dependent Claims (2, 3, 4, 5, 6, 8, 15, 16, 17)
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7. A composite article, comprising:
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(a) a solid matrix comprising a magnetocalorically passive material and having a microstructure comprising a plurality of particles of magnetocalorically passive material that have lattice structure that exhibits strain, or fractures, or both, from compression, and that, at least in part, touch one or more immediately neighboring particles of magnetocalorically passive material; (b) a plurality of solid inclusions comprising a magnetocalorically active material at least partially embedded in the solid matrix, wherein the inclusions either; (1) have a microstructure comprising a plurality of particles of magnetocalorically active material that have lattice structure that exhibits strain, or fractures, or both from compression, and that, at least in part, touch one or more immediately neighboring particles of magnetocalorically passive material, or (2) form a series of foils, flakes, or tapes embedded in the matrix; and (c) an outer coating of an electrically isolating material disposed on at least some of the particles of magnetocalorically passive material.
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9. A composite article, comprising:
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(a) a solid matrix comprising a magnetocalorically passive material having a sintered microstructure comprising a plurality of grains of magnetocalorically passive material that have lattice structure that exhibits strain relief, and that, at least in part, touch one or more immediately neighboring grains of magnetocalorically passive material via an interface comprising interdiffused atoms from the neighboring grains, resulting from sintering a compressed powder of magnetocalorically passive material; (b) a plurality of solid inclusions comprising a magnetocalorically active material at least partially embedded in the solid matrix. - View Dependent Claims (10, 11, 12, 14, 19, 20, 33, 34)
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13. A composite article, comprising:
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(a) a solid matrix comprising a magnetocalorically passive material having a sintered microstructure comprising a plurality of grains of magnetocalorically passive material that have lattice structure that exhibits strain relief, and that, at least in part, touch one or more immediately neighboring grains of magnetocalorically passive material via an interface comprising interdiffused atoms from the neighboring grains, resulting from sintering a compressed powder of magnetocalorically passive material; (b) a plurality of solid inclusions comprising a magnetocalorically active material at least partially embedded in the solid matrix; and (c) an outer coating of an electrically isolating material.
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18. A composite article, comprising:
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(a) a solid matrix comprising a magnetocalorically passive material and having a microstructure comprising a plurality of particles of magnetocalorically passive material that have lattice structure that exhibits strain, or fractures, or both, from compression, and that, at least in part, touch one or more immediately neighboring particles of magnetocalorically passive material; and (b) a plurality of solid inclusions comprising a magnetocalorically active material at least partially embedded in the solid matrix, wherein the inclusions either; (1) have a microstructure comprising a plurality of particles of magnetocalorically active material that have lattice structure that exhibits strain, or fractures, or both from compression, and that, at least in part, touch one or more immediately neighboring particles of magnetocalorically passive material, or (2) form a series of foils, flakes, or tapes embedded in the matrix, wherein the matrix comprises one or more of BeO, AIN, BN, or graphite.
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21. A composite article, comprising:
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(a) a solid matrix comprising a magnetocalorically passive material and having a microstructure comprising a plurality of particles of magnetocalorically passive material that have lattice structure that exhibits strain, or fractures, or both, from compression, and that, at least in part, touch one or more immediately neighboring particles of magnetocalorically passive material; and (b) a plurality of solid inclusions comprising a magnetocalorically active material at least partially embedded in the solid matrix, wherein the inclusions either; (1) have a microstructure comprising a plurality of particles of magnetocalorically active material that have lattice structure that exhibits strain, or fractures, or both from compression, and that, at least in part, touch one or more immediately neighboring particles of magnetocalorically passive material, or (2) form a series of foils, flakes, or tapes embedded in the matrix, wherein the inclusions are present in a volume fraction of between 25% and 98% of the volume of the composite article. - View Dependent Claims (22)
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23. A composite article, comprising:
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(a) a solid matrix comprising a magnetocalorically passive material and having a microstructure comprising a plurality of particles of magnetocalorically passive material that have lattice structure that exhibits strain, or fractures, or both, from compression, and that, at least in part, touch one or more immediately neighboring particles of magnetocalorically passive material; and (b) a plurality of solid inclusions comprising a magnetocalorically active material at least partially embedded in the solid matrix, wherein the inclusions either; (1) have a microstructure comprising a plurality of particles of magnetocalorically active material that have lattice structure that exhibits strain, or fractures, or both from compression, and that, at least in part, touch one or more immediately neighboring particles of magnetocalorically passive material, or (2) form a series of foils, flakes, or tapes embedded in the matrix, wherein the matrix comprises a soft magnetic material. - View Dependent Claims (24)
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25. A composite article, comprising:
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(a) a solid matrix comprising a magnetocalorically passive material and having a microstructure comprising a plurality of particles of magnetocalorically passive material that have lattice structure that exhibits strain, or fractures, or both, from compression, and that, at least in part, touch one or more immediately neighboring particles of magnetocalorically passive material; and (b) a plurality of solid inclusions comprising a magnetocalorically active material at least partially embedded in the solid matrix, wherein the inclusions either; (1) have a microstructure comprising a plurality of particles of magnetocalorically active material that have lattice structure that exhibits strain, or fractures, or both from compression, and that, at least in part, touch one or more immediately neighboring particles of magnetocalorically passive material, or (2) form a series of foils, flakes, or tapes embedded in the matrix, wherein the inclusions are disposed in a plurality of layers, each layer comprising inclusions of a magnetocalorically active material having a Tc which is different from the Tc of the magnetocalorically active material in an adjacent layer.
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26. A composite article, comprising:
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(a) a solid matrix comprising a magnetocalorically passive material and having a microstructure comprising a plurality of particles of magnetocalorically passive material that have lattice structure that exhibits strain, or fractures, or both, from compression, and that, at least in part, touch one or more immediately neighboring particles of magnetocalorically passive material; and (b) a plurality of solid inclusions comprising a magnetocalorically active material at least partially embedded in the solid matrix, wherein the inclusions either; (1) have a microstructure comprising a plurality of particles of magnetocalorically active material that have lattice structure that exhibits strain, or fractures, or both from compression, and that, at least in part, touch one or more immediately neighboring particles of magnetocalorically passive material, or (2) form a series of foils, flakes, or tapes embedded in the matrix, further comprising a surface having at least one channel therein. - View Dependent Claims (27)
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28. A composite article, comprising:
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(a) a solid matrix comprising a magnetocalorically passive material and having a microstructure comprising a plurality of particles of magnetocalorically passive material that have lattice structure that exhibits strain, or fractures, or both, from compression, and that, at least in part, touch one or more immediately neighboring particles of magnetocalorically passive material; (b) a plurality of solid inclusions comprising a magnetocalorically active material at least partially embedded in the solid matrix, wherein the inclusions either; (1) have a microstructure comprising a plurality of particles of magnetocalorically active material that have lattice structure that exhibits strain, or fractures, or both from compression, and that, at least in part, touch one or more immediately neighboring particles of magnetocalorically passive material, or (2) form a series of foils, flakes, or tapes embedded in the matrix; and (c) an outer protective coating. - View Dependent Claims (29)
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30. A composite article, comprising:
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(a) a solid matrix comprising a magnetocalorically passive material and having a microstructure comprising a plurality of particles of magnetocalorically passive material that have lattice structure that exhibits strain, or fractures, or both, from compression, and that, at least in part, touch one or more immediately neighboring particles of magnetocalorically passive material; (b) a plurality of solid inclusions comprising a magnetocalorically active material at least partially embedded in the solid matrix, wherein the inclusions either; (1) have a microstructure comprising a plurality of particles of magnetocalorically active material that have lattice structure that exhibits strain, or fractures, or both from compression, and that, at least in part, touch one or more immediately neighboring particles of magnetocalorically passive material, or (2) form a series of foils, flakes, or tapes embedded in the matrix; and (c) an effective porosity. - View Dependent Claims (31, 32)
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Specification