The application of copper-containing nanoparticles as a gas nitriding catalyst

Abstract

The results of the study of the possibilities of using copper-containing nanoparticles obtained by pseudomatrix synthesis as a catalyst for cyclic gas nitriding of steel products were presented in this paper. It was shown by the example of steel 08Yu (corresponding to the European standard of steel DC04/DC03 EN 10139) that the preliminary application of nanocomposite-catalyst including copper-containing nanoparticles and macromolecules of poly-(N-vinylpyrrolidone) polymer pseudomatrix to the product significantly intensified the chemical heat treatment process. It was found that under identical treatment process conditions the thickness of the diffusion layer for a sample with a pre-applied nanocomposite was 90 urn, and without such pretreatment — 42 urn It is noted that the achievement of this effect is due to the catalyst synthesis peculiarities, which allows to obtain a copper sol with a narrow size distribution of particles resistant to aggregation.

Hazard assessment of copper(I) oxide nanoparticles obtained by reduction in the presence of polymer protector

“…Their role in the creation of various catalytic systems is noted. It has been established that the use of copper nanoparticles and its oxides as a catalyst increases the efficiency of steel nitriding [5] and increases the efficiency of hydrogen purification from CO [6].…”