Control of the Structure of Diffusion Layer in Carbon Steels Under Nitriding with Preliminary Deposition of Copper Oxide Catalytic Films
- Authors: Petrova L.G.1, Aleksandrov V.A.1, Malakhov A.Y.1
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Affiliations:
- Moscow Automobile and Road Construction State Technical University (MADI)
- Issue: Vol 59, No 3-4 (2017)
- Pages: 180-185
- Section: Thermochemical Treatment
- URL: https://journals.rcsi.science/0026-0673/article/view/235619
- DOI: https://doi.org/10.1007/s11041-017-0125-x
- ID: 235619
Cite item
Abstract
The effect of thin films of copper oxide deposited before nitriding on the phase composition and the kinetics of growth of diffusion layers in carbon steels is considered. The process of formation of an oxide film involves chemical reduction of pure copper on the surface of steel specimens from a salt solution and subsequent oxidation under air heating. The oxide film exerts a catalytic action in nitriding of low- and medium-carbon steels, which consists in accelerated growth of the diffusion layer, the nitride zone in the first turn. The kinetics of the nitriding process and the phase composition of the layer are controlled by the thickness of the copper oxide precursor, i.e., the deposited copper film.
About the authors
L. G. Petrova
Moscow Automobile and Road Construction State Technical University (MADI)
Author for correspondence.
Email: petrova_madi@mail.ru
Russian Federation, Moscow
V. A. Aleksandrov
Moscow Automobile and Road Construction State Technical University (MADI)
Email: petrova_madi@mail.ru
Russian Federation, Moscow
A. Yu. Malakhov
Moscow Automobile and Road Construction State Technical University (MADI)
Email: petrova_madi@mail.ru
Russian Federation, Moscow
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