公开(公告)号：US20160379741A1

公开(公告)日：2016-12-29

申请号：US15194194

申请日：2016-06-27

Applicant: Advanced Materials Corporation

Inventor： Lawrence Frederick Allard, JR. ,  Michael P. Brady ,  Craig A. Bridges ,  Edgar Lara-Curzio ,  Ji Won Moon ,  Orlando Rios ,  Suryanarayan G. Sankar ,  Brian Zande

IPC: H01F1/11 ,  H01F1/06 ,  C12P3/00 ,  H01F1/053

CPC classification number: C12P3/00 ,  B22F1/0018 ,  B22F1/0088 ,  B22F9/22 ,  B22F2999/00 ,  C22C33/02 ,  C22C2202/02 ,  H01F1/047 ,  H01F1/065 ,  B22F2201/013 ,  B22F2201/016

Abstract: The disclosure describes a method of producing iron nitride magnets using Zn-doped iron oxide precursors. The iron oxide precursors are reduced and nitrided to produce a powder containing iron nitride in the Fe16N2 phase. The inclusion of Zn in the iron oxide precursor enhances the magnetic properties of the iron nitride powder.

Abstract translation: 本公开描述了使用掺杂Zn的氧化铁前体制备氮化铁磁体的方法。 氧化铁前体被还原并氮化以在Fe16N2相中产生含有氮化铁的粉末。 在铁氧化物前体中包含Zn增强了氮化铁粉末的磁性能。

公开(公告)号：US20140072470A1

公开(公告)日：2014-03-13

申请号：US14022829

申请日：2013-09-10

Applicant: Advanced Materials Corporation

Inventor： Suryanarayan G. Sankar ,  Laszlo John Kecskes

IPC: H01F41/02

CPC classification number: H01F41/0266 ,  H01F1/0579 ,  H01F1/059

Abstract: The present invention employs Equal Channel Angular Extrusion (ECAE) to consolidate Fe16N2, Fe4N, Sm2Fe17Nx, either alone or in combination with other magnetic powders made from Nd2Fe14B, SmCo5, Sm2Co17, Sm2Fe17Nx and MnBi to prepare dense bodies at temperatures as low as room temperature or as high as 800° C., depending on the composition. When a soft magnetic material such as α-Fe powder or Fe4N powder is mixed with a hard magnetic material such as Nd2Fe14B, SmCo5, Sm2Co17 or Sm2Fe17Nx or MnBi or FeCr alloys or a semi-hard material such as Fe16N2, exchange-coupled magnets are obtained. This is due to the fact that the current theory on exchange-coupling phenomena indicates that a nanocrystalline size of the soft magnetic material is a necessary condition for the promotion of exchange-coupling.

Abstract translation: 本发明采用等通道角挤压（ECAE）单独或与Nd2Fe14B，SmCo5，Sm2Co17，Sm2Fe17Nx和MnBi制成的其他磁性粉末组合Fe16N2，Fe4N，Sm2Fe17Nx以在低至室温的温度下制备致密体 或高达800℃，这取决于组成。 当将诸如α-Fe粉末或Fe4N粉末的软磁性材料与诸如Nd2Fe14B，SmCo5，Sm2Co17或Sm2Fe17Nx或MnBi或FeCr合金的硬磁性材料或诸如Fe16N2的半硬材料混合时，交换耦合磁体为 获得。 这是由于现有的交换耦合现象理论表明，软磁材料的纳米晶体尺寸是促进交换耦合的必要条件。

公开(公告)号：US20170177012A1

公开(公告)日：2017-06-22

申请号：US15129809

申请日：2015-03-27

Applicant: ADVANCED MATERIALS CORPORATION

Inventor： Satoru Simizu ,  Suryanarayan G. Sankar

IPC: G05D16/20

CPC classification number: G05D16/2033

Abstract: A system and method is described to precisely control the pressure in a sample chamber over a wide range of pressures. The system comprises a sample chamber connected to additional chambers via on-off valves. The volumes of these chambers are accurately pre-measured. The valves can be electronically controlled by a controller, such as a computer with a processor. Computer control of these valves to vary the pressures in the chambers to achieve a precise target pressure in the sample chamber is performed in a sequence of steps where the pressure in each chamber is calculated after each step, thereby eliminating the requirement of measuring the actual pressure in the chambers.