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1. 发明公开

US20230377797A1 COMPRESSION-MOLDING METHOD AND DEVICE FOR PERMANENT MAGNET 审中-公开
公开(公告)号：US20230377797A1
公开(公告)日：2023-11-23
申请号：US18351436
申请日：2023-07-12
申请人： HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY
发明人： Liang LI , Yiliang Lv
IPC分类号： H01F41/02 , B22F3/00 , B22F3/087
CPC分类号： H01F41/0266 , B22F3/003 , B22F3/087 , B22F2202/05
摘要： A compression-molding method for a permanent includes: providing a drive coil to generate an electromagnetic force when a transient current is passed into the drive coil, so as to apply a molding compression force to magnetic powder under compression, and providing an orientation coil to generate an orientation magnetic field when a transient current is passed into the orientation coil, thereby providing the magnetic powder under compression with an anisotropic property; and synchronously passing the transient currents to the drive coil and the orientation coil to synchronously generate the electromagnetic force and the orientation magnetic field, thereby completing compression-molding of the permanent magnet, wherein a magnitude of the electromagnetic force and an intensity of the orientation magnetic field are respectively changed by changing peak values of the transient currents.

2. 发明授权

US11584101B2 Densification methods and apparatuses 有权
公开(公告)号：US11584101B2
公开(公告)日：2023-02-21
申请号：US16719357
申请日：2019-12-18
申请人： THE BOEING COMPANY
发明人： John R. Hull , Marc R. Matsen
IPC分类号： B22F3/02 , H05B3/03 , H05B3/06 , H05B1/02 , H01L35/28 , B30B15/34 , B22F3/00 , B22F3/087 , B30B11/00 , B22F3/105 , C22C1/04 , H05B3/00 , H05B3/60
摘要： An apparatus includes a first electrode exhibiting a first Seebeck coefficient, a second electrode exhibiting a second Seebeck coefficient greater than the first Seebeck coefficient, and particles between the first and second electrodes exhibiting a third Seebeck coefficient between the first and second Seebeck coefficients. An alternating current power supply is electrically connected to the first and second electrodes. Heat is generated due to the Peltier effect at a junction between the first electrode and the particles and at a junction between the second electrode and the particles. Heat is removed due to the Peltier effect at the junction between the first electrode and the particles and at the junction between the second electrode and the particles. The particles are densified due to heating and cooling phase transitions between a higher-temperature solid phase and a lower-temperature solid phase while compressing the particles.

3. 发明申请

US20220347643A1 NANOPARTICLES AND SYSTEMS AND METHODS FOR SYNTHESIZING NANOPARTICLES THROUGH THERMAL SHOCK 有权
公开(公告)号：US20220347643A1
公开(公告)日：2022-11-03
申请号：US17750577
申请日：2022-05-23
申请人： UNIVERSITY OF MARYLAND, COLLEGE PARK
发明人： Liangbing HU , Yanan CHEN , Yonggang YAO
IPC分类号： B01J3/08 , C01B32/198 , C23C16/06 , C23C16/56 , B22F3/087 , B22F5/00 , C01G51/00 , C23C16/455 , C01G49/12 , B01J6/00 , C01B32/184 , B01J19/12 , B22F9/14 , B22F1/054 , B22F1/148
摘要： Systems and methods of synthesizing nanoparticles on substrates using rapid, high temperature thermal shock. A method involves depositing micro-sized particles or salt precursors on a substrate, and applying a rapid, high temperature thermal pulse or shock to the micro-sized particles or the salt precursors and the substrate to cause the micro-sized particles or the salt precursors to become nanoparticles on the substrate. A system may include a rotatable member that receives a roll of a substrate sheet having micro-sized particles or salt precursors; a motor that rotates the rotatable member so as to unroll consecutive portions of the substrate sheet from the roll; and a thermal energy source that applies a short, high temperature thermal shock to consecutive portions of the substrate sheet that are unrolled from the roll by rotating the first rotatable member. Some systems and methods produce nanoparticles on existing substrate. The nanoparticles may be metallic, ceramic, inorganic, semiconductor, or compound nanoparticles. The substrate may be a carbon-based substrate, a conducting substrate, or a non-conducting substrate. The high temperature thermal shock process may be enabled by electrical Joule heating, microwave heating, thermal radiative heating, plasma heating, or laser heating.

4. 发明授权

US11369929B2 Nanoparticles and systems and methods for synthesizing nanoparticles through thermal shock 有权
公开(公告)号：US11369929B2
公开(公告)日：2022-06-28
申请号：US16016395
申请日：2018-06-22
申请人： University of Maryland, College Park
发明人： Liangbing Hu , Yanan Chen , Yonggang Yao
IPC分类号： B01J3/08 , C01B32/198 , C23C16/06 , C23C16/56 , B22F3/087 , B22F5/00 , C01G51/00 , C23C16/455 , C01G49/12 , B01J6/00 , C01B32/184 , B01J19/12 , B22F9/14 , B22F1/054 , B22F1/148 , B82Y30/00 , B82Y40/00 , B22F7/04
摘要： Systems and methods of synthesizing nanoparticles on substrates using rapid, high temperature thermal shock. A method involves depositing micro-sized particles or salt precursors on a substrate, and applying a rapid, high temperature thermal shock to the micro-sized particles or the salt precursors to become nanoparticles on the substrate. A system may include a rotatable member that receives a roll of a substrate sheet having micro-sized particles or salt precursors; a motor that rotates the rotatable member so as to unroll the substrate; and a thermal energy source that applies a short, high temperature thermal shock to the substrate. The nanoparticles may be metallic, ceramic, inorganic, semiconductor, or compound nanoparticles. The substrate may be a carbon-based substrate, a conducting substrate, or a non-conducting substrate. The high temperature thermal shock process may be enabled by electrical Joule heating, microwave heating, thermal radiative heating, plasma heating, or laser heating.

5. 发明授权

US10090102B2 Method for producing rare-earth sintered magnet, and molding machine therefor 有权
公开(公告)号：US10090102B2
公开(公告)日：2018-10-02
申请号：US14420570
申请日：2013-08-12
申请人： HITACHI METALS, LTD.
发明人： Takashi Tsukada , Takuya Nansaka , Satoru Kikuchi
IPC分类号： H01F1/055 , H01F41/02 , C22C38/00 , C22C38/06 , C22C38/10 , C22C38/16 , B22F3/03 , B22F3/087 , B30B11/00 , B22F3/00 , B22F3/12 , B22F3/22 , B22F5/00 , C22C33/02 , H01F1/08 , H01F1/057
摘要： The present invention provides a method for producing a rare earth sintered magnet and a molding device therefor that can stably mold molded bodies with less variation in unit weight. The method includes: 1) preparing a slurry that includes an alloy powder containing a rare earth element, and a dispersion medium; 2) disposing an upper punch and a lower punch in respective through holes provided in a die, thereby preparing a plurality of cavities; 3) applying a magnetic field in each of the cavities by an electromagnet in a direction substantially parallel to a direction in which at least one of the upper punch and the lower punch is movable, and then supplying the slurry into the plurality of cavities; 4) producing a molded body of the alloy powder in each of the cavities by press molding in the magnetic field; and 5) sintering the molded body.

6. 发明授权

US09796020B2 Method for the manufacture of a metal part 有权
公开(公告)号：US09796020B2
公开(公告)日：2017-10-24
申请号：US13140162
申请日：2010-01-08
申请人： Christer Åslund
发明人： Christer Åslund
IPC分类号： B22F3/24 , B22F3/16 , B22F3/15 , C22C33/02 , B22F3/04 , B22F3/087
CPC分类号： B22F3/16 , B22F3/04 , B22F3/087 , B22F3/15 , B22F2998/10 , C22C33/0257 , B22F1/0096 , B22F1/02 , B22F3/1021 , B22F3/1017 , B22F3/17
摘要： A method for the manufacture of a metal part, the method including the steps: a) compacting agglomerated spherical metal powder to a preform, b) debinding and sintering the preform to a part at a temperature not exceeding 1275° C., c) performing one of the following steps: i) compacting the part to a density of more than 95% of the theoretical density, or ii) compacting the part to a density of less than 95% of the theoretical density and sintering the part at a temperature not exceeding 1275° C. to a density of more than 95% of the theoretical density, and d) subjecting the part to hot isostatic pressing at a temperature not exceeding 1200° C. The method provides an industrial process to produce fully dense parts from alloys which normally cannot be produced and still give good impact properties, which is vital for many applications where there alloys are used.

7. 发明申请

US20170103837A1 NdFeB magnet containing cerium and manufacturing method thereof 审中-公开
公开(公告)号：US20170103837A1
公开(公告)日：2017-04-13
申请号：US15389568
申请日：2016-12-23
申请人： SHENYANG GENERAL MAGNETIC CO., LTD.
发明人： Baoyu Sun , Yongli Duan
IPC分类号： H01F1/057 , C22C38/14 , C22C38/10 , C22C38/06 , C22C38/00 , C22C33/04 , C22C33/02 , B22F9/10 , B22F9/02 , B22F3/087 , B22F3/10 , B22F3/16 , B22F3/24 , B22F5/00 , C21D8/12 , C21D9/00 , H01F41/02 , C22C38/16
CPC分类号： H01F1/0577 , B22F3/1017 , B22F2998/10 , B22F2999/00 , C21D8/1216 , C21D8/1244 , C21D9/0068 , C22C33/04 , C22C38/002 , C22C38/005 , C22C38/06 , C22C38/10 , C22C38/14 , C22C38/16 , C22C2202/02 , H01F41/0273 , B22F2009/048 , B22F1/0055 , B22F9/023 , B22F2009/047 , B22F3/087 , B22F3/162 , B22F2003/248 , B22F2009/044 , B22F2201/02 , B22F3/1007 , B22F2201/20
摘要： A NdFeB magnet containing cerium and a manufacturing method thereof are provided. The manufacturing method includes steps of: refining a part of raw materials pure iron, ferro-boron, and rare earth fluoride in a crucible, adding a rest of the raw materials into the crucible and refining, casting a refined solution to a surface of a water-cooled rotation roller through a tundish and forming alloy flakes, processing the alloy flakes containing at least two different compositions with hydrogen decrepitation, milling powders, magnetic field pressing, vacuum presintering, machining and sintering, and obtaining the NdFeB magnet containing cerium. The NdFeB magnet containing cerium has a density of 7.5-7.7 g/cm3 and an average particle size of 3-7 μm; comprises a main phase and a grain boundary phase distributed around the main phase. A composite phase containing Tb is provided between the main phase and the grain boundary phase.

8. 发明申请

US20160059307A1 A DEVICE AND A METHOD FOR CONSOLIDATION OF POWDER MATERIALS 审中-公开
标题翻译：一种装置和方法，用于合成粉末材料
公开(公告)号：US20160059307A1
公开(公告)日：2016-03-03
申请号：US14780666
申请日：2014-03-28
申请人： GENICORE SPOLKA Z OGRANICZONA ODPOWIEDZIALNOSCIA
发明人： Marcin ROSINSKI
IPC分类号： B22F3/105 , B28B11/24 , B22F3/087
CPC分类号： B22F3/105 , B22F3/087 , B22F2003/1051 , B22F2202/06 , B28B11/243
摘要： The object of the invention is a device intended for powder materials consolidation, provided with an operating chamber, press connected to high-current discharge electrodes top and bottom, with arranged therebetween the sintered powder subjected to the pressure exerted by the press. To the top and bottom electrode there is connected a capacitive circuit with a power supply unit, closed by a high-current switch being a transistor switch. The object of the invention is also a method of powder materials consolidation in the device according to the invention, wherein the powder material is subjected to simultaneous operation of pressure in the range of 1-200 MPa and consolidation by electric current pulses with intensity of 1-80 kA, repeated with frequency from the range of 0.1 Hz to 100 Hz, generated by opening and closing the transistor switch.
摘要翻译：本发明的目的是用于粉末材料固结的装置，其具有操作室，压力机连接到顶部和底部的大电流放电电极，其间布置有经受压机施加的压力的烧结粉末。对于顶部和底部电极，电容电路与电源单元连接，由作为晶体管开关的高电流开关闭合。本发明的目的还是根据本发明的装置中粉末材料固结的方法，其中粉末材料经受同样操作的压力在1-200MPa的范围内，并通过强度为1的电流脉冲进行固结 -80 kA，通过打开和关闭晶体管开关产生的频率从0.1 Hz到100 Hz的范围重复。

9. 发明授权

US5762967A Rubber mold for producing powder compacts 失效
标题翻译：用于生产粉末压块的橡胶模具
公开(公告)号：US5762967A
公开(公告)日：1998-06-09
申请号：US634625
申请日：1996-04-18
申请人： Masato Sagawa , Hiroshi Nagata , Toshihiro Watanabe
发明人： Masato Sagawa , Hiroshi Nagata , Toshihiro Watanabe
IPC分类号： B22F3/02 , B22F3/00 , B22F3/035 , B22F3/04 , B22F3/087 , B22F3/12 , B30B15/02 , H01F41/02 , B29C45/17
CPC分类号： B22F3/1233 , B22F3/04 , B22F3/087 , B30B15/024 , H01F41/0266 , B22F2999/00 , Y10S425/033 , Y10S425/044
摘要： A elastically and reversibly deformable rubber mold for producing powder compacts is made of a material at least a part of which is a mixture of rubber and magnetic powder. In use, this rubber mold filled with the magnetic powder and subjected to a magnetic field and pressure with punches, thereby compressing the powder to form powder compact. This makes the distribution of magnetic field in the cavity of the rubber mold more homogeneous, and therefore, the distortion, cracking and chipping caused by inhomogeneity of the distribution of the magnetic field are reduced, so that the shape of the resultant powder compact is closer to the end product.
摘要翻译：用于制造粉末压块的弹性和可逆变形的橡胶模具由其至少一部分是橡胶和磁粉的混合物的材料制成。在使用中，该橡胶模具充满磁粉并用冲压进行磁场和压力，由此压缩粉末以形成粉末压块。这使得橡胶模具的空腔中的磁场分布更加均匀，因此由于磁场分布的不均匀性引起的变形，破裂和碎裂减少，使得所得到的粉末形状更接近到最终产品。

10. 发明授权

US4762754B1 失效
公开(公告)号：US4762754B1
公开(公告)日：1991-10-15
申请号：US11154487
申请日：1987-10-23
申请人： WILLIAM J NELLIS , BRIAN MAPLE M , THEODORE H GEBALLE
发明人： WILLIAM J NELLIS , M BRIAN MAPLE , THEODORE H GEBALLE
IPC分类号： B01J3/08 , B22F3/08 , B22F3/087 , H01L39/24 , B22F3/00
CPC分类号： B01J3/08 , B22F3/08 , B22F3/087 , H01L39/2419 , Y10S420/901 , Y10S505/807 , Y10S505/809 , Y10S505/815 , Y10T428/12056 , Y10T428/12146 , Y10T428/12611

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