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Nuclear microprobe characterization of surface hardening by precipitation of chromium carbides after laser beam treatment of a NiCr substrate
Author(s) -
Mosbah Michelle,
Gosset James,
Trocellier Patrick,
Puig T.,
Cantarel M.,
Condat M.
Publication year - 1990
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.740160182
Subject(s) - materials science , carbide , microprobe , chromium , electron microprobe , metallurgy , laser , chromium carbide , hardening (computing) , alloy , analytical chemistry (journal) , composite material , mineralogy , optics , chemistry , physics , layer (electronics) , chromatography
Abstract Surface treatment by laser provides interesting solutions to the problem of accelerated wear of materials. The aim of the present study is the characterization of chromium carbide‐rich surface alloys after laser beam melting of an Ni 70 Cr 30 carbon‐precoated substrate. Transmission electron microscopy investigation shows the structure of the carburized zone, and electron diffraction shows the type of carbides formed. Carbon profiling of the lasered surface was performed by nuclear microprobe using the 12 C(d, p 0 ) 13 C reaction; Ni and Cr (more precisely, the ratio Ni/Cr) were evaluated semi‐quantitatively by means of particle‐induced x‐ray emission. The specificity of the method and the experimental conditions are explained. Wear results are very satisfactory and close to those obtained by injection of chromium carbide powders into the laser beam in the case of a Nimonic alloy: wear rates are divided by two orders of magnitude.