On the fundamental mechanisms of active screen plasma nitriding

Corujeira Gallo, Santiago and Dong, Hanshan 2009, On the fundamental mechanisms of active screen plasma nitriding, Vacuum, vol. 84, no. 2, pp. 321-325, doi: 10.1016/j.vacuum.2009.07.002.

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Title On the fundamental mechanisms of active screen plasma nitriding
Author(s) Corujeira Gallo, SantiagoORCID iD for Corujeira Gallo, Santiago orcid.org/0000-0002-7305-2931
Dong, Hanshan
Journal name Vacuum
Volume number 84
Issue number 2
Start page 321
End page 325
Total pages 5
Publisher Elsevier
Place of publication Oxford, Eng.
Publication date 2009-09-18
ISSN 0042-207X
1879-2715
Keyword(s) plasma nitriding
nitriding mechanisms
active screen
iron nitride
Summary The nitriding mechanisms of conventional DC plasma treatments have been extensively studied and discussed, but no general agreement has been reached thus far. The sputtering and redeposition theory is among the most accepted ones but, even though this mechanism is feasible, its contribution to the nitriding effect is under question. Furthermore, the novel active screen plasma nitriding technique has been successful in treating samples left at floating potential, where sputtering can not be considered to play a major role. Therefore, it has been proposed that the material sputtered from the cathodic mesh of the active screen furnace (auxiliary cathode) and deposited onto the treated specimens is involved in the mass transfer of nitrogen. The contribution made by this transferred material is the focus of attention of the present study. The hardening effect on the treated specimens showed considerable correlation with the deposition layer, and the XRD analysis of this deposited material yielded possible FeN and FexN peaks. This finding supports the deposition of iron nitrides and their subsequent decomposition on the treated substrate as a mechanism of significance to the plasma nitriding treatments conducted in active screen experimental settings.
Language eng
DOI 10.1016/j.vacuum.2009.07.002
Field of Research 091207 Metals and Alloy Materials
0912 Materials Engineering
Socio Economic Objective 869999 Manufacturing not elsewhere classified
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2009, Elsevier
Persistent URL http://hdl.handle.net/10536/DRO/DU:30088207

Document type: Journal Article
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