Apport des techniques EXAFS et apparentées a la determination de l'ordre local: application a la tribologie |
| J. Lopez, J.C. Le Bossé, G. Hansali Laboratoire de Tribologie et de Dynamique des Systèmes, CNRS URA 855, Ecole Nationale d'Ingénieurs de St Etienne, 58 rue Jean Parot, 42023 St Etienne, France M. Belin et J.M. Martin Laboratoire de Tribologie et de Dynamique des Systèmes, CNRS URA 855, Ecole Centrale de Lyon, 36 av. Guy de Collongue, BP 163, 69131 Ecully, France |
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| CONTRIBUTION OF EXAFS-LIKE TECHNIQUES TO THE DETERMINATION OF LOCAL ORDER: APPLICATION TO TRIBOLOGY: The determination of local order at atomic scale becomes more and more fundamental for understanding superficial phenomena such as tribology and catalysis. Among a few techniques available in this field, we are only concerned with the EXAFS-like ones (EXAFS, SEXAFS, EXELFS, SEELFS, etc.). The difficulties appearing all along the numerical treatment of such spectra are carefully analysed and a methodology is proposed in view to obtain reliable radial distribution functions. Some applications of these techniques are presented in two fields connected with tribology: friction induced amorphisation in high vacuum and characterization of interfacial solid bodies created during a wear process including an antiwear additive. |
| DOI: 10.12693/APhysPolA.83.551 PACS numbers: 61.10.Lx |