Nd‐YAG Laser Nitriding of t‐Zirconia | Zendy

Kathuria Yash P. | Zendy

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Nd‐YAG Laser Nitriding of t‐Zirconia

Author(s) -

Kathuria Yash P.

Publication year - 2007

Publication title -

plasma processes and polymers

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.644

H-Index - 74

eISSN - 1612-8869

pISSN - 1612-8850

DOI - 10.1002/ppap.200731802

Subject(s) - nitriding , materials science , cubic zirconia , raman spectroscopy , yttria stabilized zirconia , tetragonal crystal system , nitrogen , layer (electronics) , diffraction , metallurgy , indentation hardness , analytical chemistry (journal) , crystallography , composite material , crystal structure , microstructure , chemistry , optics , ceramic , physics , organic chemistry , chromatography

Surface nitriding of yttria (Y 2 O 3 ) stabilized tetragonal zirconia (t‐ZrO 2 ) has been performed using the pulsed Nd‐YAG laser irradiation in the nitrogen atmosphere. The results show modification of the crystallographic structure between the original t‐ZrO 2 and the treated one. Nitrogen atoms enter in ZrO 2 substituting oxygen atoms in the network. X‐Ray diffraction and Raman spectra show an efficient transformation of the t‐ZrO 2 at the surface that exhibits typical yellow‐gold color of ZrN with high hardness and wear resistance. The hardness measured with Vickers indenter yields a high value of 1410 HV. Nitriding is accompanied by the formation of a few micron thick gradient layer of ZrN structure on the top and a partial transformation of t‐ZrO 2 into cubic zirconia ( c ‐ZrO 2 ) beneath deep in the bulk due to nitrogen concentration gradient.

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