Influence of ion nitriding process on the properties of zirconia coating deposited on stainless steel

GOMEZ, B J; CARUSO RICARDO,; NACHEZ LUCAS,; PARRALEJO A, DÍAZ; FEUGEAS, J N; DE SANCTIS OSCAR,

BRAZILIAN JOURNAL OF PHYSICS

Brazilian Physical Society

Lugar: Sao Pablo; Año: 2006 vol. 36 p. 1000 - 1003

0103-9733

ZrO_{2}-3 mol % Y_{2}O_{3}-coated AISI 310 stainless steel wasnitrided using plasma produced by dc pulsed discharge in a mixture of N_{2} and H_{2} at an equilibrium temperature of 450 oC. Profilechemical analyses with GDOS (glow discharge optical spectroscopy) and XRDshowed the formation of Nitrogen/Y - ZrO_{2} solid solution. Nitrogen atomsenter in the zirconia substituting to the oxygen atoms in thenetwork. Although, the nitrogen content measured in zirconia coating is greater than theallowed maximum nitrogen content in doped-zirconia solid solution, theformation of oxynitrides could not be detected. The phase structure was investigated by X-ray diffractometry. The mechanical properties were studied bymeans ultramicrohardness indentation tests. The nitruration improves themechanical responses of the ZrO_{2}-3 mol  Y_{2}O_{3} -coated AISI 310stainless steel.