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    Cerium-iron-based magnetic compounds
    11.
    发明授权
    Cerium-iron-based magnetic compounds 有权
    铈 - 铁基磁性化合物

    公开(公告)号：US09548150B2

    公开(公告)日：2017-01-17

    申请号：US13786807

    申请日：2013-03-06

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Chen Zhou ,  Frederick E. Pinkerton ,  Jan F. Herbst

    IPC: H01F1/057 ,  H01F1/058 ,  H01F1/059 ,  H01F1/055

    CPC classification number: H01F1/0593

    Abstract: New magnetic materials containing cerium, iron, and small additions of a third element are disclosed. These materials comprise compounds Ce(Fe12−xMx) where x=1-4, having the ThMn12 tetragonal crystal structure (space group I4/mmm, #139). Compounds with M=B, Al, Si, P, S, Sc, Co, Ni, Zn, Ga, Ge, Zr, Nb, Hf, Ta, and W are identified theoretically, and one class of compounds based on M=Si has been synthesized. The Si cognates are characterized by large magnetic moments (4πMs greater than 1.27 Tesla) and high Curie temperatures (264≦Tc≦305° C.). The Ce(Fe12−xMx) compound may contain one or more of Ti, V, Cr, and Mo in combination with an M element. Further enhancement in Tc is obtained by nitriding the Ce compounds through heat treatment in N2 gas while retaining the ThMn12 tetragonal crystal structure; for example CeFe10Si2N1.29 has Tc=426° C.

    Abstract translation: 公开了含有铈，铁和少量添加第三元素的新的磁性材料。 这些材料包括具有ThMn12四方晶系结构（空间群I4 / mmm，＃139）的x = 1-4的化合物Ce（Fe12-xMx）。 理论上确定M = B，Al，Si，P，S，Sc，Co，Ni，Zn，Ga，Ge，Zr，Nb，Hf，Ta和W的化合物，一类基于M = Si 已被合成。 Si同系物的特征在于大磁矩（4πMs大于1.27特斯拉）和高居里温度（264≤Tc≤305℃）。 Ce（Fe12-xMx）化合物可以含有与M元素组合的Ti，V，Cr和Mo中的一种或多种。 通过在N 2气中热处理氮化Ce化合物同时保留ThMn12四方晶体结构，可以进一步提高Tc; 例如CeFe10Si2N1.29具有Tc = 426℃

    Synthesis of ordered L10-type FeNi nanoparticles
    13.
    发明授权
    Synthesis of ordered L10-type FeNi nanoparticles 有权
    有序L10型FeNi纳米粒子的合成

    公开(公告)号：US09142350B2

    公开(公告)日：2015-09-22

    申请号：US13798292

    申请日：2013-03-13

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Frederick E. Pinkerton

    IPC: B22F9/14 ,  H01F41/02 ,  H01F1/06

    CPC classification number: H01F41/0266 ,  B22F9/14 ,  B22F2998/10 ,  B22F2999/00 ,  C22C1/0433 ,  C22C33/0278 ,  C22C2202/02 ,  H01F1/0045 ,  H01F1/068 ,  B22F2003/248 ,  B22F2202/05

    Abstract: Particles of iron and nickel are added to a flowing plasma stream which does not chemically alter the iron or nickel. The iron and nickel are heated and vaporized in the stream, and then a cryogenic fluid is added to the stream to rapidly cause the formation of nanometer size particles of iron and nickel. The particles are separated from the stream. The particles are preferably formed as single crystals in which the iron and nickel atoms are organized in a tetragonal L10 crystal structure which displays magnetic anisotropy. A minor portion of an additive, such as titanium, vanadium, aluminum, boron, carbon, phosphorous, or sulfur, may be added to the plasma stream with the iron and nickel to enhance formation of the desired crystal structure.

    Abstract translation: 将铁和镍的颗粒加入到不化学改变铁或镍的流动等离子体流中。 铁和镍在流中被加热和蒸发，然后将低温流体加入到流中以迅速形成纳米尺寸的铁和镍颗粒。 颗粒与流分离。 颗粒优选形成为单晶，其中铁和镍原子组织成显示磁各向异性的四方晶L10晶体结构。 添加剂的一小部分，例如钛，钒，铝，硼，碳，磷或硫可以与铁和镍一起添加到等离子体流中以增强所需晶体结构的形成。

    Lightweight dual-phase alloys
    15.
    发明授权
    Lightweight dual-phase alloys 有权

    公开(公告)号：US10519531B2

    公开(公告)日：2019-12-31

    申请号：US15436198

    申请日：2017-02-17

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Zhongyi Liu ,  Frederick E. Pinkerton

    IPC: C22C30/00 ,  C22C1/04 ,  B33Y70/00 ,  B22F9/04

    Abstract: According to aspects of the present disclosure, a ternary alloy includes a dual-phase microstructure including a first phase and a second phase. The first phase defines a hexagonal close-packed structure with a stoichiometric ratio of Al4Fe1.7Si. The second phase defines a face-centered cubic structure with a stoichiometric ratio of Al3Fe2Si. The dual-phase microstructure is stable above about 800° C., and the dual-phase microstructure has a first-phase abundance greater than about 50 parts by weight and a second-phase abundance less than about 50 parts by weight based on 100 parts by weight of the ternary alloy.

    Method for fabricating non-planar magnet
    16.
    发明授权
    Method for fabricating non-planar magnet 有权

    公开(公告)号：US10460871B2

    公开(公告)日：2019-10-29

    申请号：US15290660

    申请日：2016-10-11

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Frederick E. Pinkerton ,  Anil K. Sachdev

    IPC: B21C23/00 ,  H01F41/02 ,  B21D22/02 ,  B21C23/06 ,  B21C23/12 ,  B21C23/18 ,  B21C35/02 ,  B21D35/00

    Abstract: A method for fabricating a non-planar magnet includes extruding a precursor material including neodymium iron boron crystalline grains into an original anisotropic neodymium iron boron permanent magnet having an original shape, wherein the original anisotropic neodymium iron boron permanent magnet has at least about 90 percent neodymium iron boron magnetic material by volume. The original anisotropic neodymium iron boron permanent magnet is heated to a deformation temperature. The original anisotropic neodymium iron boron permanent magnet is deformed into a reshaped anisotropic neodymium iron boron permanent magnet having a second shape substantially different from the original shape using heated tooling to apply a deformation load to the original anisotropic neodymium iron boron permanent magnet. The original anisotropic neodymium iron boron permanent magnet and the reshaped anisotropic neodymium iron boron permanent magnet each have respective magnetic moments substantially aligned with a respective local surface normal corresponding to the respective magnetic moment.

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