Objective
A promising approach to improve permanent magnets is to investigate new compounds. Structural chemistry and phase equilibria in ternary systems RE-(Fe,Co)-M will be studied in order to find highly anisotropic structures with easy axis magnetisation. Metastable materials with ultrafine microstructures will be prepared by rapid solidification and suitable annealing treatments. Sintering of the materials will be studied to produce pinning-type magnets with improved coercivity and temperature stability.
A promising approach to improve permanent magnets is to investigate new compounds. Structural chemistry and phase equilibria in ternary systems RE(iron, cobalt)M where RE is a rare earth and M is a metal will be studied in order to find highly anisotropic structures with easy axis magnetisation. Metastable materials with ultrafine microstructures will be prepared by rapid solidification and suitable annealing treatments. Sintering of the materials will be studied to produce pinning type magnets with improved coercivity and temperature stability.
The systematic investigation of thermodynamic phase equilibria, structural chemistry and magnetism of ternary systems RE(iron, cobalt)M (which are essentially formed by one of the early rare earth elements and a metal preferably from the 3rd, 4th and 5th main group) has been completed. The elaboration of the promising permanent magnet material samarium(2)iron(17)nitrogen(x) by rapid quenching of samarium(2)iron(17) alloys and subsequent nitrogenation treatment has been studied. Finally addition of alloying elements (nickel plus aluminium, tungsten plus boron, chromium plus silicon) to neodymium(2)iron(14)boron alloys has been investigated with the hope to precipitate compounds which could pin the magnetic domains and increase the coercivity of these industrial alloys.
The objectives of the project were to improve magnetic performance or use properties (thermal stability) of hard magnetic alloys. New compositions or new elaboration processes of rare earth transition metals based alloys were investigated. An assessment was made of the ultimate magnetic performances of market neodymium iron boride magnets made by powder metallurgy or rapid quenching methods. A systematic mapping has been carried out for ternary (thermodynamic and magnetic) phase diagrams of alloys based on rare earth transition metal compounds. Elaboration has been made of selected new alloys with suitable magnetic anisotropy and grain size by rapid quenching and subsequent annealing treatment. The most promising result has been achieved in the case of samarium (2) iron (17) nitrogen (3-x) hard magnetic nitrides.
THE CRYSTAL STRUCTURE AND THE CRYSTAL CHEMISTRY OF SELECTED RE-TM-X SYSTEMS (RE: RARE EARTH, TM: TRANSITION METAL, X: METALLOID) WILL BE INVESTIGATED.
ELABORATION OF NEW INTERMETALLIC COMPOUNDS WILL BE PERFORMED BY RAPID SOLIDIFICATION IN ORDER TO PRODUCE NEW METASTABLE MATERIALS. THIS PROCESSING WILL BE CARRIED OUT BY USING THE MODERN PLANAR FLOW CASTING TECHNIQUES IN CONTROLLED ATMOSPHERE. THE RIBBONS PRODUCED WILL BE ANALYSED BY DIFFERENTIAL SCANNING CALORIMETRY AND TRANSMISSION ELECTRON MICROSCOPY.
THE MATERIALS WILL BE CRYSTALLOGRAPHICALLY INVESTIGATED AND THEIR MAGNETIC PROPERTIES CHARACTERISED.
OPTIMISED FERROMAGNETIC COMPOUNDS WILL BE PREPARED ON A LARGER SCALE BY VACUUMSCHMELZE WHICH WILL ALSO PERFORM THE PROCESSING OF LABORATORY MAGNETS BY POWDER METALLURGY. THE METALLURGICAL CHARACTERIZATION AND THE DETERMINATION OF THE STRUCTURE OF SUCH PRODUCTS WILL SUBSEQUENTLY BE MADE.
A REVIEW OF THE RESULTS OBTAINED FROM THE MAGNETS IN VIEW OF THEIR DEVELOPMENT FOR APPLICATIONS IN INDUSTRY WILL BE CARRIED OUT.
SCIENTIFIC AND ECONOMIC BENEFITS ARE EXPECTED FROM THIS PROJECT DUE TO THE FACT THAT PERMANENT MAGNETS ARE USED IN MANY DIFFERENT DEVICES SUCH AS MOTORS, COUPLINGS, SWITCHES AND LOUDSPEAKERS. THE USE OF NEW PERMANENT MAGNETS WILL RESULT IN AN IMPROVED EFFICIENCY OF THE DEVICES, WITH SAVINGS IN WEIGHT, ENERGY AND PRODUCTION COSTS. PERMANENT MAGNETS WITH AN IMPROVED MAXIMUM ENERGY PRODUCT WILL INITIATE INNOVATIVE APPLICATIONS SUCH AS PERMANENT MAGNET SYSTEMS FOR MAGNETIC SEPARATION AND NUCLEAR MAGNETIC RESONANCE MEDICAL IMAGING (MRI).
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- engineering and technology materials engineering crystals
- natural sciences chemical sciences inorganic chemistry transition metals
- natural sciences chemical sciences inorganic chemistry metalloids
- engineering and technology medical engineering diagnostic imaging
- engineering and technology materials engineering metallurgy
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
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Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
38054 GRENOBLE
France
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.