The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 21, 2011
Filed:
Sep. 02, 2008
Peter Mullner, Boise, ID (US);
Markus Chmielus, Boise, ID (US);
David C. Dunand, Evanston, IL (US);
Yuttanant Boonyongmaneerat, Bangkok, TH;
Peter Mullner, Boise, ID (US);
Markus Chmielus, Boise, ID (US);
David C. Dunand, Evanston, IL (US);
Yuttanant Boonyongmaneerat, Bangkok, TH;
Boise State University, Boise, ID (US);
Northwestern University, Evanston, IL (US);
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 NaAlO.