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Kinetics of Thermal Oxidation of Titanium Nitride Powder at Different Oxidizing Atmospheres
Author(s) -
Hou XinMei,
Hu XiaoJun,
Chou KuoChih
Publication year - 2011
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.1551-2916.2010.04084.x
Subject(s) - oxidizing agent , partial pressure , thermogravimetric analysis , isothermal process , materials science , oxide , oxygen , kinetics , thermal oxidation , titanium , nitride , scanning electron microscope , chemical engineering , titanium nitride , diffusion , inorganic chemistry , chemistry , layer (electronics) , metallurgy , composite material , thermodynamics , organic chemistry , physics , quantum mechanics , engineering
The oxidation behavior of titanium nitride powder at different oxidizing atmospheres was investigated using thermogravimetric analysis, X‐ray diffraction, and scanning electron microscopy. Oxidation experiments have been carried out both in isothermal as well as nonisothermal modes. The nonisothermal oxidation result showed that the oxidation rate was affected by temperature, heating rate, and oxygen partial pressure. The isothermal oxidation result showed that the diffusion of oxygen through the oxide product layer to the oxide/titanium nitride interface was the rate‐controlling step and the oxidation product became obviously porous at elevated temperature. In view of the oxidation kinetics, Chou model, which quantitatively expresses the oxidation weight increment as a function of time, heating rate, temperature, and oxygen partial pressure, has been employed and gotten a good agreement.