The effect of nitrogen on the isothermal oxidation of substoichiometric zirconium carbide: Microstructural and spectroscopic investigations (2024)

Konnik, M. T., Oldham, T., Panerai, F. (Accepted/In press). The effect of nitrogen on the isothermal oxidation of substoichiometric zirconium carbide: Microstructural and spectroscopic investigations. Ceramics International. https://doi.org/10.1016/j.ceramint.2024.04.387

The effect of nitrogen on the isothermal oxidation of substoichiometric zirconium carbide: Microstructural and spectroscopic investigations. / Konnik, Matthew T.; Oldham, Trey; Panerai, Francesco et al.
In: Ceramics International, 2024.

Research output: Contribution to journal › Article › peer-review

Konnik, MT, Oldham, T, Panerai, F 2024, 'The effect of nitrogen on the isothermal oxidation of substoichiometric zirconium carbide: Microstructural and spectroscopic investigations', Ceramics International. https://doi.org/10.1016/j.ceramint.2024.04.387

Konnik MT, Oldham T, Panerai F, Stephani KA. The effect of nitrogen on the isothermal oxidation of substoichiometric zirconium carbide: Microstructural and spectroscopic investigations. Ceramics International. 2024. doi: 10.1016/j.ceramint.2024.04.387

Konnik, Matthew T. ; Oldham, Trey ; Panerai, Francesco et al. / The effect of nitrogen on the isothermal oxidation of substoichiometric zirconium carbide : Microstructural and spectroscopic investigations. In: Ceramics International. 2024.

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title = "The effect of nitrogen on the isothermal oxidation of substoichiometric zirconium carbide: Microstructural and spectroscopic investigations",

abstract = "The oxidation behavior of hot-pressed sub-stoichiometric zirconium carbide was investigated through isothermal flow-tube furnace experiments at temperatures ranging from 1000 to 1600 °C. Auxiliary gas composition influence on the oxidation of ZrC0.63 was studied by introducing oxygen to substrates held under either pure argon or nitrogen environments. During furnace ramp-up, prior to isothermal oxygen exposure, nitrogen flow was found to infiltrate the substrate resulting in ZrCxNy formation which provided superior oxidation resistance to the as-received ZrC0.63. Ex situ investigation of ceramic-oxide interfacial regions revealed the presence of carbon precipitate in both material sets at treatment temperatures of up to 1400 °C, along with the presence of the ZrCxOy system. At sufficiently high test temperatures, resulting scale formations for the N2/O2 systems were found to be less porous than the Ar/O2 counterparts, with a higher degree of c-/t-ZrO2 crystallites present at room temperature attributed to nitrogen incorporation into the anion sublattice of ZrO2.",

author = "Konnik, {Matthew T.} and Trey Oldham and Francesco Panerai and Stephani, {Kelly A.}",

note = "Publisher Copyright: {\textcopyright} 2024 The Authors",

year = "2024",

doi = "10.1016/j.ceramint.2024.04.387",

language = "English (US)",

journal = "Ceramics International",

issn = "0272-8842",

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T1 - The effect of nitrogen on the isothermal oxidation of substoichiometric zirconium carbide

T2 - Microstructural and spectroscopic investigations

AU - Konnik, Matthew T.

AU - Oldham, Trey

AU - Panerai, Francesco

AU - Stephani, Kelly A.

N1 - Publisher Copyright:© 2024 The Authors

PY - 2024

Y1 - 2024

N2 - The oxidation behavior of hot-pressed sub-stoichiometric zirconium carbide was investigated through isothermal flow-tube furnace experiments at temperatures ranging from 1000 to 1600 °C. Auxiliary gas composition influence on the oxidation of ZrC0.63 was studied by introducing oxygen to substrates held under either pure argon or nitrogen environments. During furnace ramp-up, prior to isothermal oxygen exposure, nitrogen flow was found to infiltrate the substrate resulting in ZrCxNy formation which provided superior oxidation resistance to the as-received ZrC0.63. Ex situ investigation of ceramic-oxide interfacial regions revealed the presence of carbon precipitate in both material sets at treatment temperatures of up to 1400 °C, along with the presence of the ZrCxOy system. At sufficiently high test temperatures, resulting scale formations for the N2/O2 systems were found to be less porous than the Ar/O2 counterparts, with a higher degree of c-/t-ZrO2 crystallites present at room temperature attributed to nitrogen incorporation into the anion sublattice of ZrO2.

AB - The oxidation behavior of hot-pressed sub-stoichiometric zirconium carbide was investigated through isothermal flow-tube furnace experiments at temperatures ranging from 1000 to 1600 °C. Auxiliary gas composition influence on the oxidation of ZrC0.63 was studied by introducing oxygen to substrates held under either pure argon or nitrogen environments. During furnace ramp-up, prior to isothermal oxygen exposure, nitrogen flow was found to infiltrate the substrate resulting in ZrCxNy formation which provided superior oxidation resistance to the as-received ZrC0.63. Ex situ investigation of ceramic-oxide interfacial regions revealed the presence of carbon precipitate in both material sets at treatment temperatures of up to 1400 °C, along with the presence of the ZrCxOy system. At sufficiently high test temperatures, resulting scale formations for the N2/O2 systems were found to be less porous than the Ar/O2 counterparts, with a higher degree of c-/t-ZrO2 crystallites present at room temperature attributed to nitrogen incorporation into the anion sublattice of ZrO2.

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