公开(公告)号：US20130220497A1

公开(公告)日：2013-08-29

申请号：US13408027

申请日：2012-02-29

Applicant: Christopher S. Huskamp ,  Christopher Booth-Morrison ,  David C. Dunand ,  David N. Seidman ,  James M. Boileau ,  Bita Ghaffari

Inventor： Christopher S. Huskamp ,  Christopher Booth-Morrison ,  David C. Dunand ,  David N. Seidman ,  James M. Boileau ,  Bita Ghaffari

IPC: C22F1/043 ,  C22C21/00 ,  C22C21/02 ,  C22F1/04

CPC classification number: C22C21/00 ,  B22D21/007 ,  C22C21/02 ,  C22F1/04 ,  C22F1/043

Abstract: An aluminum alloy including additions of scandium, zirconium, erbium and, optionally, silicon.

Abstract translation: 包括添加钪，锆，铒和任选的硅的铝合金。

公开(公告)号：US07964290B2

公开(公告)日：2011-06-21

申请号：US12203112

申请日：2008-09-02

Applicant: Peter Mullner ,  Markus Chmielus ,  David C. Dunand ,  Yuttanant Boonyongmaneerat

Inventor： Peter Mullner ,  Markus Chmielus ,  David C. Dunand ,  Yuttanant Boonyongmaneerat

IPC: B32B5/18

CPC classification number: C22C19/00 ,  C22C38/00 ,  H01F1/0308 ,  H01F1/408 ,  Y10T428/12479 ,  Y10T428/12681 ,  Y10T428/12771 ,  Y10T428/12861 ,  Y10T428/12931 ,  Y10T428/12944 ,  Y10T428/12951 ,  Y10T428/249953

Abstract: A magnetic materials construct and a method to produce the construct are disclosed. The construct exhibits large magnetic-field-induced deformation through the magnetic-field-induced motion of crystallographic interfaces. The construct is a porous, polycrystalline composite structure of nodes connected by struts wherein the struts may be monocrystalline or polycrystalline. If the struts are polycrystalline, they have a “bamboo” microstructure wherein the grain boundaries traverse the entire width of the strut. The material from which the construct is made is preferably a magnetic shape memory alloy, including polycrystalline Ni—Mn—Ga. The construct is preferably an open-pore foam. The foam is preferably produced with a space-holder technique. Space holders may be dissolvable ceramics and salts including NaAlO2.

Abstract translation: 公开了一种磁性材料结构和一种制备该构造体的方法。 该结构通过磁场诱导的晶体界面运动表现出大的磁场诱导变形。 该结构是通过支柱连接的节点的多孔多晶复合结构，其中支柱可以是单晶或多晶。 如果支柱是多晶的，则它们具有“竹”微结构，其中晶界穿过支柱的整个宽度。 制造构造物的材料优选为包括多晶Ni-Mn-Ga的磁性形状记忆合金。 该构造物优选为开孔泡沫。 泡沫优选用空间保持器技术制造。 空间支架可以是可溶解的陶瓷和盐，包括NaAlO 2。

公开(公告)号：US20110064965A1

公开(公告)日：2011-03-17

申请号：US12840203

申请日：2010-07-20

Applicant: Peter Mullner ,  Markus Chmielus ,  Cassie Witherspoon ,  David C. Dunand ,  Xuexi Zhang ,  Yuttanant Boonyongmaneerat

Inventor： Peter Mullner ,  Markus Chmielus ,  Cassie Witherspoon ,  David C. Dunand ,  Xuexi Zhang ,  Yuttanant Boonyongmaneerat

IPC: B32B15/01 ,  H01F1/04

CPC classification number: C22C19/00 ,  B22F3/1115 ,  B22F3/1121 ,  C22C1/0433 ,  C22C38/00 ,  C22C2202/02 ,  H01F1/0308 ,  Y10T428/12479 ,  Y10T428/12681 ,  Y10T428/12771 ,  Y10T428/12861 ,  Y10T428/12931 ,  Y10T428/12951

Abstract: Magnetic materials and methods exhibit large magnetic-field-induced deformation/strain (MFIS) through the magnetic-field-induced motion of crystallographic interfaces. The preferred materials are porous, polycrystalline composite structures of nodes connected by struts wherein the struts may be monocrystalline or polycrystalline. The materials are preferably made from magnetic shape memory alloy, including polycrystalline Ni—Mn—Ga, formed into an open-pore foam, for example, by space-holder technique. Removal of constraints that interfere with MFIS has been accomplished by introducing pores with sizes similar to grains, resulting in MFIS values of 0.12% in polycrystalline Ni—Mn—Ga foams, close to the best commercial magnetostrictive materials. Further removal of constraints has been accomplished by introducing pores smaller than the grain size, dramatically increasing MFIS to 2.0-8.7%. These strains, which remain stable over >200,000 cycles, are much larger than those of any polycrystalline, active material.

Abstract translation: 磁性材料和方法通过磁场诱导的晶体界面运动表现出大的磁场诱导的变形/应变（MFIS）。 优选的材料是通过支柱连接的节点的多孔，多晶复合结构，其中支柱可以是单晶或多晶。 这些材料优选由例如通过空间保持器技术形成为开孔泡沫的多晶Ni-Mn-Ga的磁性形状记忆合金制成。 通过引入尺寸与颗粒大小相似的孔，可以去除干扰MFIS的约束，导致多晶Ni-Mn-Ga泡沫中的MFIS值为0.12％，接近最好的商业磁致伸缩材料。 通过引入小于晶粒尺寸的孔，已经进一步去除约束，使MFIS显着提高到2.0-8.7％。 这些菌株在超过20万次循环中保持稳定，远远大于任何多晶活性物质。

公开(公告)号：US20100150767A1

公开(公告)日：2010-06-17

申请号：US12590992

申请日：2009-11-17

Applicant: David C. Dunand ,  Ampika Bansiddhi

Inventor： David C. Dunand ,  Ampika Bansiddhi

IPC: B22F3/11 ,  B22F1/00 ,  B32B15/02 ,  B32B5/18

CPC classification number: B22F3/1103 ,  B22F3/1121 ,  B22F3/1146 ,  B22F2998/00 ,  B22F2998/10 ,  B22F2999/00 ,  B22F3/1021 ,  B22F3/1134 ,  B22F3/1035

Abstract: A method of making a metallic foam by a sintering process that includes solid state sintering and transient liquid phase sintering to form and then densify the metallic foam structure. A metallic foam is provided having a sintered foam skeleton structure with desirable macro-pores throughout wherein the undesirable micropores in walls of the skeleton structure are filled by a eutectic phase without closing off the desirable macro-pores.

Abstract translation: 通过包括固态烧结和瞬时液相烧结的烧结工艺制造金属泡沫的方法，以形成并致密化金属泡沫结构。 提供了具有烧结泡沫骨架结构的金属泡沫，其具有期望的大孔，其中骨架结构的壁中的不期望的微孔被共晶相填充而不关闭期望的大孔。

公开(公告)号：US06355120B1

公开(公告)日：2002-03-12

申请号：US09471865

申请日：1999-12-23

Applicant: David C. Dunand ,  Peter Zwigl

Inventor： David C. Dunand ,  Peter Zwigl

IPC: C22F100

CPC classification number: C22F1/00 ,  C22F1/183

Abstract: The invention produces mismatch plastic deformation in a workpiece by altering the chemical composition of the workpiece material, while the workpiece is subjected to a biasing stress, in a manner that introduces a strain increment into the material, deforming the workpiece without causing failure. In one approach, repeated cyclic alteration of chemical composition, so as to repeatedly alternately induce and reverse a phase transition that produces strain increment, allows accumulation of strain in an incremental fashion thereby achieving overall large, superplastic deformations in the workpiece without applying large stresses.

Abstract translation: 本发明通过改变工件材料的化学成分，同时工件受到偏压应力，以将应变增量引入材料，使工件变形而不引起故障的方式，在工件中产生失配塑性变形。 在一种方法中，化学组成的重复循环改变，以便反复交替地诱导和反转产生应变增量的相变，允许以增量方式累积应变，从而在不施加大应力的情况下实现工件中的整体大的超塑性变形。