公开(公告)号：US20230326637A1

公开(公告)日：2023-10-12

申请号：US18209532

申请日：2023-06-14

申请人： HRL Laboratories, LLC

发明人： Brennan YAHATA ,  Eric CLOUGH ,  Christopher HENRY ,  Amber SUCICH ,  Darby LAPLANT ,  Tobias SCHAEDLER

IPC分类号： H01F1/055 ,  C22C38/00 ,  C22C38/30 ,  C22C38/08 ,  C22C38/10 ,  C22C38/06 ,  B33Y80/00 ,  H01F7/02 ,  H01F1/057 ,  H01F13/00 ,  H01F41/02

CPC分类号： H01F1/055 ,  C22C38/005 ,  C22C38/30 ,  C22C38/08 ,  C22C38/105 ,  C22C38/06 ,  B33Y80/00 ,  H01F7/021 ,  H01F7/0278 ,  H01F1/0577 ,  H01F13/003 ,  H01F41/0266 ,  H01F41/0273 ,  C22C2202/02

摘要： This invention provides methods for fabricating a hard or soft magnet with tailorable magnetic and crystallographic orientations. Methods are disclosed to individually tailor three-dimensional voxels for selected crystallographic orientations and, independently, selected magnetic orientations with location specificity throughout a magnet. Some variations provide a method of making a magnet, comprising: providing a feedstock composition containing magnetic or magnetically susceptible materials; exposing the feedstock composition to an energy source for melting, thereby generating a first melt layer; solidifying the first melt layer in the presence of an externally applied magnetic field, thereby generating a magnetic metal layer containing a plurality of individual voxels; optionally repeating to generate a plurality of solid layers; and recovering a magnet comprising the magnetic metal layer(s), wherein the externally applied magnetic field has a magnetic-field orientation that is selected to control a magnetic axis and a crystallographic texture within the magnetic metal layer(s).

公开(公告)号：US20240087780A1

公开(公告)日：2024-03-14

申请号：US18509479

申请日：2023-11-15

申请人： HRL Laboratories, LLC

发明人： Brennan YAHATA ,  Eric CLOUGH ,  Christopher HENRY ,  Amber SUCICH ,  Darby LAPLANT ,  Tobias SCHAEDLER

IPC分类号： H01F1/055 ,  B33Y80/00 ,  C22C38/00 ,  C22C38/06 ,  C22C38/08 ,  C22C38/10 ,  C22C38/30 ,  H01F1/057 ,  H01F7/02 ,  H01F13/00 ,  H01F41/02

CPC分类号： H01F1/055 ,  B33Y80/00 ,  C22C38/005 ,  C22C38/06 ,  C22C38/08 ,  C22C38/105 ,  C22C38/30 ,  H01F1/0577 ,  H01F7/021 ,  H01F7/0278 ,  H01F13/003 ,  H01F41/0266 ,  H01F41/0273 ,  C22C2202/02

摘要： Some variations provide a permanent-magnet structure comprising: a region having a plurality of magnetic domains and a region-average magnetic axis, wherein each of the magnetic domains has a domain magnetic axis that is substantially aligned with the region-average magnetic axis, and wherein the plurality of magnetic domains is characterized by an average magnetic domain size. Within the region, there is a plurality of metal-containing grains characterized by an average grain size, and each of the magnetic domains has a domain easy axis that is dictated by a crystallographic texture of the metal-containing grains. The region has a region-average easy axis based on the average value of the domain easy axis within that region. The region-average magnetic axis and the region-average easy axis form a region-average alignment angle that has a standard deviation less than 30° within the plurality of magnetic domains. Many permanent-magnet structures are disclosed herein.

公开(公告)号：US20230416160A1

公开(公告)日：2023-12-28

申请号：US18243141

申请日：2023-09-07

申请人： HRL Laboratories, LLC

发明人： Mark O'MASTA ,  Phuong BUI ,  Tobias SCHAEDLER

IPC分类号： C04B35/80 ,  C04B35/628

CPC分类号： C04B35/80 ,  C04B35/628 ,  C04B2235/5276 ,  C04B2111/40

摘要： Some variations provide a pre-ceramic matrix composite comprising: a precursor pre-ceramic matrix; reinforcing elements disposed within the precursor pre-ceramic matrix; and a compressible material disposed on the surface of the reinforcing elements and interposed between the reinforcing elements and the precursor pre-ceramic matrix. Other variations provide a ceramic matrix composite comprising: a ceramic matrix; reinforcing elements disposed within the ceramic matrix; and a compressed material disposed on the surface of the reinforcing elements and interposed between the reinforcing elements and the matrix. The coating of compressible material prevents cracking during processing because the coating absorbs stresses associated with volumetric shrinkage of the ceramic matrix during densification, thereby reducing the stresses at the interface between the reinforcing elements and the ceramic matrix. Methods of fabricating ceramic matrix composites using the principles of the invention are disclosed. Methods include pyrolysis of pre-ceramic polymers, sintering of pre-ceramic materials, and sol-gel processing.