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Title: Hybrid Nanocrystalline Permanent Magnets for Beam Focusing in High Energy Accelerators

In this DoE 2004 STTR Phase I research project, bulk hybrid nanograin Nd2Fe14B/Sm2(Co,Fe)17 magnets with MHc = 14.2 kOe and (BH)max = 27.3 MGOe were successfully synthesized. In addition, bulk nanograin PrCo5 magnets with MHc over 15 kOe and bulk hybrid anisotropic nanocomposite Pr2(Fe,Co)14B/Pr(Co,Fe)5 and Pr2(Fe,Co)14B/Pr2(Co,Fe)17 magnets with (BH)max of 28 to 35 MGOe were synthesized. These efforts were guided by the novel model of coercivity mechanism in nanograin magnetic materials and through the use of the innovative rapid RF inductive hot compaction process. With further R&D, a new class of permanent magnets that have the same level of magnetic performance as the mainstream sintered Nd-Fe-B magnets with (BH)max = 35 to 45 MGOe and much improved thermal stability will be developed.
Authors:
;
Publication Date:
OSTI Identifier:
841460
DOE Contract Number:
FG02-04ER86185
Resource Type:
Technical Report
Research Org:
FutureTek Corp. USA
Sponsoring Org:
USDOE Office of Science (SC);
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE High temperature; hybrid magnets; anisotropic nanocomposite; Nd-Fe-B; Sm-Co; Pr-Co; temperature coefficient; thermal stability