Light elements analysis using 3He microbeam

Guy Terwagne, Franz Bodart, Bart Blanpain, H. Mohrbacher, Jean-Pierre Celis

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    Résumé

    Coatings containing light elements such as carbon, nitrogen or oxygen play actually an important role in surface engineering as a means to improve the tribological performance. In this paper, we have studied the wear tracks on a diamond coating after a fretting test against a Cr steel ball. The microprobe facility of the LARN has been used to determine light elements concentration in the wear tracks because the size of the tracks was less than 100 μm and the transfer layer from the Cr steel counterbody was not uniform. Quantitative analysis of oxygen has been performed using the 2.392 MeV resonance of the reaction at 90°, while carbon has been measured simultaneously with the 12C(3He, p1)14N∗ reaction at 175°. The cross sections and the Q-value of this reaction are so high that an absorber is not required, so we can also measure the backscattered 3He particles in the same detector. A correlation between carbon, oxygen and iron has been made to investigate the possibility of interdiffusion between the diamond coating and the transferred material due to the fretting test.
    langue originaleAnglais
    Pages (de - à)266-270
    Nombre de pages5
    journalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
    Volume104
    Les DOIs
    Etat de la publicationPublié - 1995

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