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

BERNARDO J. GÓMEZ; LUCAS NACHEZ; RICARDO CARUSO; ANTONIO DÍAZ-PARRALEJO; JORGE N. FEUGEAS; OSCAR DE SANCTIS

JOURNAL OF TESTING AND EVALUATION

AMER SOC TESTING MATERIALS

Lugar: West Conshohocken; Año: 2010 vol. 8 p. 1 - 9

0090-3973

Duplex coatings on stainless steel 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 de-posited phases. The zirconia coating process over the nitrided steel initiated strong diffusion events. Hy-drogen 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.