Published 1998 | Version v1
Miscellaneous Metadata-only

The oxidation of a Nd-Fe based nanocomposite alloy investigated by 57Fe Moessbauer spectrometry

Creators

  • 1. Rouen Univ. (France). Groupe de Metallurgie Phys.
  • 2. Inst. of Materials Science and Engineering, Poznan Univ. of Technology (Poland)

Description

A Nd12.6Fe69.3Co11.6Zr0.5B6/α-Fe nanocomposite alloy prepared by high energy ball milling was investigated by Moessbauer spectrometry. The analysis of the unoxidized powder revealed that Co is present in both hard and soft phases. The oxidation process of the nanocomposite at 250 and 300 C was investigated and compared to that of the pure Nd2Fe14B phase. It appeared that the Nd2(Fe,Co,Zr)14B phase dissociates first, being less corrosion resistant than α-Fe(Co). The dissociation products are the same as for pure Nd2Fe14B. A slowering of the dissociation process, compared to pure Nd2Fe14B, was evidenced, and interpreted in relation with the microstructure of the powder. The powder being constituted of aggregates of Nd2(Fe,Co,Zr)14B and α-Fe(Co) nanograins, the slowering of the dissociation process suggests that the α-Fe(Co) phase acts as a protective layer for the Nd2(Fe,Co,Zr)14B nanograins within the aggregates. (orig.)

Part of:
Rare-earth magnets and their applications. Vol. 2. Proceedings

Additional details

Publishing Information

ISBN
3-88355-264-X
Imprint Title
Rare-earth magnets and their applications. Vol. 2. Proceedings
Imprint Pagination
529 p.
Journal Page Range
p. 887-896

Conference

Title
15. international workshop on rare-earth magnets and their applications
Dates
30 Aug - 3 Sep 1998
Place
Dresden (Germany)

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
31027187
Subject category
S36: MATERIALS SCIENCE;
Resource subtype / Literary indicator
Conference, Non-conventional Literature
Descriptors DEI
BORON ALLOYS; COBALT ALLOYS; COMPOSITE MATERIALS; CORROSION PROTECTION; CORROSION RESISTANCE; DISSOCIATION; IRON; IRON BASE ALLOYS; LAYERS; MAGNETIC MATERIALS; MICROSTRUCTURE; MOESSBAUER EFFECT; NEODYMIUM ALLOYS; OXIDATION; PERMANENT MAGNETS; POWDER METALLURGY; REACTION KINETICS; ZIRCONIUM ALLOYS
Descriptors DEC
ALLOYS; CHEMICAL REACTIONS; ELEMENTS; EQUIPMENT; IRON ALLOYS; KINETICS; MAGNETS; MATERIALS; METALLURGY; METALS; RARE EARTH ALLOYS; TRANSITION ELEMENT ALLOYS; TRANSITION ELEMENTS

Optional Information

Notes
19 refs.