Abstract
The formation of iron nitride layer at low temperatures, 600-700 K, by Moessbauer spectroscopy is studied. These layers were obtained basically through two different processes: ion nitriding and ammonia gas nitriding. A preliminary study about post-discharge nitriding was made using discharge in hollow cathode as well as microwave excitation. The assembly of these chambers is also described. The analysis of the nitrided samples was done by CEMS and CXMS, aided by optical microscopy, and the CEMS and CXMS detectors were constructed by ourselves. We also made a brief study about these detectors, testing as acetone as the mixture 80% He+10% C H{sub 4} as detection gases for the use of CEMS. The surface analysis of the samples showed that in the ammonia gas process nitriding the nitrided layer starts by the superficial formation of an iron nitride rich nitrogen. By thermal evolution this nitride promotes the diffusion of nitrogen and the formation of other more stable nitrides. (author).
Citation Formats
Figueiredo, R.S. de.
Surface analysis in steel nitrides by using Moessbauer spectroscopy; Analise de superficie em acos nitretados por espectroscopia Moessbauer.
Brazil: N. p.,
1991.
Web.
Figueiredo, R.S. de.
Surface analysis in steel nitrides by using Moessbauer spectroscopy; Analise de superficie em acos nitretados por espectroscopia Moessbauer.
Brazil.
Figueiredo, R.S. de.
1991.
"Surface analysis in steel nitrides by using Moessbauer spectroscopy; Analise de superficie em acos nitretados por espectroscopia Moessbauer."
Brazil.
@misc{etde_10157183,
title = {Surface analysis in steel nitrides by using Moessbauer spectroscopy; Analise de superficie em acos nitretados por espectroscopia Moessbauer}
author = {Figueiredo, R.S. de}
abstractNote = {The formation of iron nitride layer at low temperatures, 600-700 K, by Moessbauer spectroscopy is studied. These layers were obtained basically through two different processes: ion nitriding and ammonia gas nitriding. A preliminary study about post-discharge nitriding was made using discharge in hollow cathode as well as microwave excitation. The assembly of these chambers is also described. The analysis of the nitrided samples was done by CEMS and CXMS, aided by optical microscopy, and the CEMS and CXMS detectors were constructed by ourselves. We also made a brief study about these detectors, testing as acetone as the mixture 80% He+10% C H{sub 4} as detection gases for the use of CEMS. The surface analysis of the samples showed that in the ammonia gas process nitriding the nitrided layer starts by the superficial formation of an iron nitride rich nitrogen. By thermal evolution this nitride promotes the diffusion of nitrogen and the formation of other more stable nitrides. (author).}
place = {Brazil}
year = {1991}
month = {Jul}
}
title = {Surface analysis in steel nitrides by using Moessbauer spectroscopy; Analise de superficie em acos nitretados por espectroscopia Moessbauer}
author = {Figueiredo, R.S. de}
abstractNote = {The formation of iron nitride layer at low temperatures, 600-700 K, by Moessbauer spectroscopy is studied. These layers were obtained basically through two different processes: ion nitriding and ammonia gas nitriding. A preliminary study about post-discharge nitriding was made using discharge in hollow cathode as well as microwave excitation. The assembly of these chambers is also described. The analysis of the nitrided samples was done by CEMS and CXMS, aided by optical microscopy, and the CEMS and CXMS detectors were constructed by ourselves. We also made a brief study about these detectors, testing as acetone as the mixture 80% He+10% C H{sub 4} as detection gases for the use of CEMS. The surface analysis of the samples showed that in the ammonia gas process nitriding the nitrided layer starts by the superficial formation of an iron nitride rich nitrogen. By thermal evolution this nitride promotes the diffusion of nitrogen and the formation of other more stable nitrides. (author).}
place = {Brazil}
year = {1991}
month = {Jul}
}