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Nitridation of Zirconia
Author(s) -
Lerch Martin
Publication year - 1996
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1996.tb09028.x
Subject(s) - nitrogen , cubic zirconia , materials science , nitriding , ceramic , oxygen , zirconium , analytical chemistry (journal) , chemical engineering , inorganic chemistry , chemistry , metallurgy , organic chemistry , engineering
ZrO 2 can be nitrided partially by nitrogen at temperatures >1400°C. It is possible to describe all the synthesized phases with the general formula ZrO 2‐2χ N 4χ/3 (system ZrO 2 ‐Zr 3 N 4 ). Parameters–such as nitridation time, temperature, nitrogen pressure, and particle size–have a strong effect on the amount of incorporated nitrogen. Variation of these parameters allows the synthesis of Zr‐O‐N ceramics within a wide range of possible compositions. ZrO 2‐2χ cN4 χ/3 phases synthesized by reaction of ZrO 2 with nitrogen show ordered anion vacancies (β‐type structures). β‐type phases are non‐transformable under mechanical stress at ambient temperature. Nitrogen‐containing ZrO 2 shows very poor oxidation resistance. At temperatures >600°C, stability is found only in the presence of an oxygen getter.