Skip to main content
Aller à la page d’accueil de la Commission européenne (s’ouvre dans une nouvelle fenêtre)
français fr
CORDIS - Résultats de la recherche de l’UE
CORDIS
Contenu archivé le 2024-04-30

electron-probe microanalysis of light elements - measurement methods and certified reference materials

Objectif



Many materials have complex microstructures, the chemical and structural aspects of which crucially determine performance. Thus measurements methods are required to accurately describe these micro features, and electron-probe microanalysis (BPMA) is widely used in industry, test houses and research organisations to determine the chemical composition of areas only a few microns in diameter. Unfortunately, although widely used, standardisation of the measurement method is only just beginning. ISO TC202 dealing with this topic is only just starting its work, while in CEN so far only one ENV has been drafted by TC 184 which relates to ceramic coatings. In the latter case, the important issue of light element analysis was not addressed.

In many materials, particularly steels and corrosion and wear resistant coatings light elements (low atomic number) play a major role in determining performance, but are difficult to analyse by EPMA, and special methods have to be devised. Because of the importance of the measurement method many different organisations have evolved their own "standards", but none of these are generally accepted. Increasing tightness of specifications requires highly accurate analysis, and without validation of the existing methods there can be no certainty as to the results obtained in the individual organisations.

The research to be undertaken in this proposal is focussed on the microanalysis of carbon and nitrogen. Reference materials based on Fe3C and Fe4N will be produced, and their homogeneity and stability established. The procedures to be adopted follow those recommended in the document BCR/48/93, Dec l994. In order to comply with this procedure it will also be necessary to develop an accurate measurement methodology. This is needed to optimise what are normally weak signals, and establish the validity of a linear compositional relationship between zero and that present in the compound. This will be carried out using a range of steels containing C and N in solid solution as well as a range of common carbides and nitrides. Having established the optimum measurement parameters, batches of the reference materials will be produced and certified using the optimised methods. The results of the certification will be analysed using recommended BCR statistical software packages to determine the certified values and their uncertainties. The certified reference materials (CRMs) will then be prepared for storage by IRMM.

Thus the main deliverables will be production and certification of and the optimisation of a measurement methodology.

Champ scientifique (EuroSciVoc)

CORDIS classe les projets avec EuroSciVoc, une taxonomie multilingue des domaines scientifiques, grâce à un processus semi-automatique basé sur des techniques TLN. Voir: Le vocabulaire scientifique européen.

Vous devez vous identifier ou vous inscrire pour utiliser cette fonction

Programme(s)

Programmes de financement pluriannuels qui définissent les priorités de l’UE en matière de recherche et d’innovation.

Thème(s)

Les appels à propositions sont divisés en thèmes. Un thème définit un sujet ou un domaine spécifique dans le cadre duquel les candidats peuvent soumettre des propositions. La description d’un thème comprend sa portée spécifique et l’impact attendu du projet financé.

Appel à propositions

Procédure par laquelle les candidats sont invités à soumettre des propositions de projet en vue de bénéficier d’un financement de l’UE.

Données non disponibles

Régime de financement

Régime de financement (ou «type d’action») à l’intérieur d’un programme présentant des caractéristiques communes. Le régime de financement précise le champ d’application de ce qui est financé, le taux de remboursement, les critères d’évaluation spécifiques pour bénéficier du financement et les formes simplifiées de couverture des coûts, telles que les montants forfaitaires.

CSC - Cost-sharing contracts

Coordinateur

NPL MANAGEMENT LTD.
Contribution de l’UE
Aucune donnée
Adresse
Queens Road
TW11 0LW TEDDINGTON
Royaume-Uni

Voir sur la carte

Coût total

Les coûts totaux encourus par l’organisation concernée pour participer au projet, y compris les coûts directs et indirects. Ce montant est un sous-ensemble du budget global du projet.

Aucune donnée

Participants (9)

Mon livret 0 0