Published 2010 | Version v1
Miscellaneous Open

Production of NdFeB powders by HDDR from sintered magnets

Creators

  • 1. Instituto de Pesquisas Tecnologicas (IPT), Sao Paulo, SP (Brazil). Lab. de Metalurgia e Materiais Ceramicos
  • 2. Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)
  • 3. Universidade Federal Fluminense (UFF), Niteroi, RJ (Brazil)

Description

The production of NdFeB powders by the HDDR process from metallic alloys has been widely investigated. Different HD and DR conditions have been used to induce anisotropy and to improve the intrinsic coercivity of the obtained powders. The purpose of this study is to apply the HDDR process in the reprocessing of NdFeB sintered magnet scraps. There were investigated different processing conditions as temperature and time of desorption and recombination (DR). The results of X ray diffraction show the formation of the magnetic phase Nd2Fe14B in all the investigated conditions. Magnetic measurements by vibrating sample magnetometer indicate that powders with intrinsic coercivity up to 790 kA/m were obtained. (author)

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Additional details

Additional titles

Original title (Portuguese)
Obtencao de pos de NdFeB por HDDR a partir de imas sinterizados

Publishing Information

Imprint Pagination
8 p.
Report number
INIS-BR--9137

Conference

Title
Brazilian congress on engineering and materials science
Original Conference Title
19. CBECIMAT: Congresso brasileiro de engenharia e ciencia dos materiais
Acronym
19. CBECIMAT
Dates
21-25 Nov 2010
Place
Campos do Jordao, SP (Brazil)

INIS

Country of Publication
Brazil
Country of Input or Organization
Brazil
INIS RN
42056337
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Resource subtype / Literary indicator
Conference
Descriptors DEI
BORON; COERCIVE FORCE; CRYSTALLOGRAPHY; DIFFUSE SCATTERING; IRON; MAGNETIC PROPERTIES; NEODYMIUM; STRUCTURAL CHEMICAL ANALYSIS; X RADIATION; X-RAY DIFFRACTION
Descriptors DEC
COHERENT SCATTERING; DIFFRACTION; ELECTROMAGNETIC RADIATION; ELEMENTS; IONIZING RADIATIONS; METALS; PHYSICAL PROPERTIES; RADIATIONS; RARE EARTHS; SCATTERING; SEMIMETALS; TRANSITION ELEMENTS