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:
Jul. 14, 2020
Filed:
May. 13, 2016
Dalian University of Technology, Liaoning, CN;
Wei Zhang, Liaoning, CN;
Yingmin Wang, Liaoning, CN;
Yanhui Li, Liaoning, CN;
Dianguo Ma, Liaoning, CN;
DALIAN UNIVERSITY OF TECHNOLOGY, Dalian Liaoning, CN;
Abstract
A kind of nano-porous Fe—Pt alloys with strong permanent magnetism and a preparation method therefor. The nano-porous Fe—Pt alloys have the composition of FeCoPtPdand are composed of an ordered hard magnetic L1-FePt phase, and have an integrated doubly-connected nano-porous structure with pore sizes of 10-50 nm, and ligament thicknesses of 20-80 nm. Under an applied magnetic field of 50 kOe, the coercivity, magnetization intensity and remanence of the alloys are 13.4-18.5 kOe, 40.4-56.3 emu/g and 28.3-37.4 emu/g, respectively. The master alloy ingots are prepared using electric arc melting or induction melting; the alloy ribbons are prepared using the single-roller melt-spinning equipment; the precursors mainly containing nano-composite phases of hard magnetic L1-FePt and soft magnetic FeB are obtained directly by the melt-spinning or obtained by conducting vacuum annealing on the melt-spun ribbons; and the nano-porous Fe—Pt alloys with a single L1-FePt phase are obtained by the electrochemical dealloying technique, thereby filling in the technical blank of nano-porous metal materials with permanent magnetism.