SEDL / STP / STP1532-EB / STP153220120006

Interdiffusion Phenomena of Zirconia-Nitride Layers on Coated AISI 310 Steel

Gómez, Bernardo J.
Instituto de Física Rosario (CONICET-UNR), Rosario,

Nachez, Lucas
Instituto de Física Rosario (CONICET-UNR), Rosario,
Instituto Fluminense de Educação Superior, Santo Antônio de Pádua, RJ

Caruso, Ricardo
Instituto de Física Rosario (CONICET-UNR), Rosario,
Laboratorio de Materiales Cerámicos, Universidad Nacional de Rosario, Rosario,

Díaz-Parralejo, Antonio
Departamento de Electrónica e Ingeniería Electromecánica, Escuela de Ingenierías Industriales, Universidad de Extremadura, Badajoz,

Feugeas, Jorge N.
Instituto de Física Rosario (CONICET-UNR), Rosario,

de Sanctis, Oscar
Laboratorio de Materiales Cerámicos, Universidad Nacional de Rosario, Rosario,

Pages: 13    Published: Apr 2012

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Abstract

Duplex coatings on stainless steel American Iron and Steel Institute (AISI) 310 were prepared by a double process consisting of a plasma nitriding treatment and a multilayer ZrO²-3 mol % Y²O³ coating grown by chemical solution deposition. In this paper we investigate the interdiffusion phenomena between the elements and the deposited phases. The zirconia coating process over the nitrided steel initiated strong diffusion events. Hydrogen diffuses easily throughout the coating and acts as a reducing agent. The layer of zirconia works as a sieve, retaining nitrogen and allowing the passage of hydrogen. The contribution of this study show the interdiffusion at the interfaces of elements in samples subjected to treatments known as duplex coatings.