Oxidation behaviour of monolithic TiN ceramic

Anna Tampieri; E. Landi; A. Bellosi

Oxidation behaviour of monolithic TiN ceramic

Anna Tampieri, E. Landi, A. Bellosi

Houston Methodist

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

16 Scopus citations

Abstract

A series of experiments is described on the oxidation of hot pressed monolithic TiN, in static air, over the temperature range 400° to 1100°C. Several oxidation regimes, dependent on temperature and time, were observed for which different oxidation mechanisms are proposed: Diffusion controlled parabolic behaviour (700°-800°C). Inhomogeneous diffusion through surface microcracks (900°C and the first stage at 1000°C). Diffusion through a continuous oxide scale (early stage at 1100°C). Logarithmic law behaviour (longer time oxidation at 1000° and 1100°C). Activation energies were calculated as 254 kJ/mole for 700°-800°C and 190 kJ/mole for 900°-1000°C. At 1000° and 1100°C the oxide scale was founded to consist of preferentially oriented TiO₂ crystals.

Original language	English (US)
Pages (from-to)	194-196
Number of pages	3
Journal	British ceramic. Transactions and journal
Volume	90
Issue number	6
State	Published - Dec 1 1991

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Engineering(all)

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title = "Oxidation behaviour of monolithic TiN ceramic",

abstract = "A series of experiments is described on the oxidation of hot pressed monolithic TiN, in static air, over the temperature range 400° to 1100°C. Several oxidation regimes, dependent on temperature and time, were observed for which different oxidation mechanisms are proposed: Diffusion controlled parabolic behaviour (700°-800°C). Inhomogeneous diffusion through surface microcracks (900°C and the first stage at 1000°C). Diffusion through a continuous oxide scale (early stage at 1100°C). Logarithmic law behaviour (longer time oxidation at 1000° and 1100°C). Activation energies were calculated as 254 kJ/mole for 700°-800°C and 190 kJ/mole for 900°-1000°C. At 1000° and 1100°C the oxide scale was founded to consist of preferentially oriented TiO2 crystals.",

author = "Anna Tampieri and E. Landi and A. Bellosi",

year = "1991",

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AU - Tampieri, Anna

AU - Landi, E.

AU - Bellosi, A.

PY - 1991/12/1

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N2 - A series of experiments is described on the oxidation of hot pressed monolithic TiN, in static air, over the temperature range 400° to 1100°C. Several oxidation regimes, dependent on temperature and time, were observed for which different oxidation mechanisms are proposed: Diffusion controlled parabolic behaviour (700°-800°C). Inhomogeneous diffusion through surface microcracks (900°C and the first stage at 1000°C). Diffusion through a continuous oxide scale (early stage at 1100°C). Logarithmic law behaviour (longer time oxidation at 1000° and 1100°C). Activation energies were calculated as 254 kJ/mole for 700°-800°C and 190 kJ/mole for 900°-1000°C. At 1000° and 1100°C the oxide scale was founded to consist of preferentially oriented TiO2 crystals.

AB - A series of experiments is described on the oxidation of hot pressed monolithic TiN, in static air, over the temperature range 400° to 1100°C. Several oxidation regimes, dependent on temperature and time, were observed for which different oxidation mechanisms are proposed: Diffusion controlled parabolic behaviour (700°-800°C). Inhomogeneous diffusion through surface microcracks (900°C and the first stage at 1000°C). Diffusion through a continuous oxide scale (early stage at 1100°C). Logarithmic law behaviour (longer time oxidation at 1000° and 1100°C). Activation energies were calculated as 254 kJ/mole for 700°-800°C and 190 kJ/mole for 900°-1000°C. At 1000° and 1100°C the oxide scale was founded to consist of preferentially oriented TiO2 crystals.

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JF - British ceramic. Transactions and journal

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ER -

Oxidation behaviour of monolithic TiN ceramic

Abstract

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