Published March 15, 2017 | Version v1
Journal article Metadata-only

Enhanced coercivity thermal stability realized in Nd–Fe–B thin films diffusion-processed by Nd–Co alloys

Creators

  • 1. Department of Physics and Chemistry of Materials, School of Materials Science and Engineering, Northeastern University, Shenyang 110819 (China)
  • 2. Key laboratory of electromagnetic processing of materials (EPM), Ministry of Education, Northeastern University, Shenyang 110819 (China)
  • 3. Shenyang National Laboratory for Materials Science, Institute of Metal Research (IMR), Chinese Academy of Sciences (CAS), Shenyang 110016 (China)

Description

A proposed Nd2Fe14B-core/Nd2(Fe, Co)14B-shell microstructure was realized by diffusion-processing textured Nd14Fe77B9 single-layer film with Nd100−xCox (x=10, 20 and 40) alloys to improve the coercivity thermal stability. The ambient coercivity was increased from around 1 T in single-layer film to nearly 2 T in diffusion-processed films, which was due to the Nd-rich grain boundaries as seen from transmission electron microscopy (TEM) images. The coercivity thermal stability was improved by the core/shell microstructure because Nd-rich grain boundaries provided the high ambient coercivity and Co-rich shell provided the improved coercivity stability. - Highlights: • Core–shell microstructure proposed for enhancing the coercivity thermal stability. • Coercivity enhanced to nearly 2 T by diffusion-processing with Nd–Co alloy. • Good squareness and highly textured microstructure obtained. • Nd-rich phases observed by TEM after diffusion process. • Coercivity thermal stability improved with minor Co addition in grain boundary regions.

Availability note (English)

Available from http://dx.doi.org/10.1016/j.jmmm.2016.09.068

Additional details

Identifiers

DOI
10.1016/j.jmmm.2016.09.068;
PII
S0304-8853(16)31366-X;

Publishing Information

Journal Title
Journal of Magnetism and Magnetic Materials
Journal Volume
426
Journal Page Range
p. 550-553
ISSN
0304-8853
CODEN
JMMMDC

INIS

Country of Publication
Netherlands
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
48102428
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
BORON ALLOYS; COBALT ALLOYS; COERCIVE FORCE; DIFFUSION; GRAIN BOUNDARIES; IRON; IRON ALLOYS; MAGNETIC PROPERTIES; NEODYMIUM ALLOYS; PERMANENT MAGNETS; THIN FILMS; TRANSMISSION ELECTRON MICROSCOPY
Descriptors DEC
ALLOYS; ELECTRON MICROSCOPY; ELEMENTS; EQUIPMENT; FILMS; MAGNETS; METALS; MICROSCOPY; MICROSTRUCTURE; PHYSICAL PROPERTIES; RARE EARTH ALLOYS; TRANSITION ELEMENT ALLOYS; TRANSITION ELEMENTS

Optional Information

Copyright
Copyright (c) 2016 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.