Oxidation Behavior of Titanium Boride at Elevated Temperatures

Young Hag Koh; Seung Yong Lee; Hyoun Ee Kim

doi:10.1111/j.1151-2916.2001.tb00641.x

Oxidation Behavior of Titanium Boride at Elevated Temperatures

Young Hag Koh, Seung Yong Lee, Hyoun Ee Kim

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

120 Citations (Scopus)

Abstract

The oxidation behavior of dense TiB2 specimens was investigated. Hot-pressed TiB₂ with 2.5 wt% Si₃N₄ as a sintering aid was exposed to air at temperatures between 800° and 1200°C for up to 10 h. The TiB₂ exhibited two distinct oxidation behaviors depending on the temperature. At temperatures below 1000°C, parabolic weight gains were observed as a result of the formation of TiO₂(s) and B₂O₃(l) on the surface. The oxidation layer comprised two layers: an inner layer of crystalline TiO₂ and an outer layer mainly composed of B2O3. When the oxidation temperatures were higher than 1000°C, gaseous B₂O₃ was formed along with crystalline TiO₂ by the oxidation process. In this case, the surface was covered with large TiO₂ grains imbedded in a highly textured small TiO₂ matrix.

Original language	English
Pages (from-to)	239-241
Number of pages	3
Journal	Journal of the American Ceramic Society
Volume	84
Issue number	1
DOIs	https://doi.org/10.1111/j.1151-2916.2001.tb00641.x
Publication status	Published - 2001 Jan
Externally published	Yes

ASJC Scopus subject areas

Ceramics and Composites
Materials Chemistry

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10.1111/j.1151-2916.2001.tb00641.x

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title = "Oxidation Behavior of Titanium Boride at Elevated Temperatures",

abstract = "The oxidation behavior of dense TiB2 specimens was investigated. Hot-pressed TiB2 with 2.5 wt% Si3N4 as a sintering aid was exposed to air at temperatures between 800° and 1200°C for up to 10 h. The TiB2 exhibited two distinct oxidation behaviors depending on the temperature. At temperatures below 1000°C, parabolic weight gains were observed as a result of the formation of TiO2(s) and B2O3(l) on the surface. The oxidation layer comprised two layers: an inner layer of crystalline TiO2 and an outer layer mainly composed of B2O3. When the oxidation temperatures were higher than 1000°C, gaseous B2O3 was formed along with crystalline TiO2 by the oxidation process. In this case, the surface was covered with large TiO2 grains imbedded in a highly textured small TiO2 matrix.",

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AU - Koh, Young Hag

AU - Lee, Seung Yong

AU - Kim, Hyoun Ee

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N2 - The oxidation behavior of dense TiB2 specimens was investigated. Hot-pressed TiB2 with 2.5 wt% Si3N4 as a sintering aid was exposed to air at temperatures between 800° and 1200°C for up to 10 h. The TiB2 exhibited two distinct oxidation behaviors depending on the temperature. At temperatures below 1000°C, parabolic weight gains were observed as a result of the formation of TiO2(s) and B2O3(l) on the surface. The oxidation layer comprised two layers: an inner layer of crystalline TiO2 and an outer layer mainly composed of B2O3. When the oxidation temperatures were higher than 1000°C, gaseous B2O3 was formed along with crystalline TiO2 by the oxidation process. In this case, the surface was covered with large TiO2 grains imbedded in a highly textured small TiO2 matrix.

AB - The oxidation behavior of dense TiB2 specimens was investigated. Hot-pressed TiB2 with 2.5 wt% Si3N4 as a sintering aid was exposed to air at temperatures between 800° and 1200°C for up to 10 h. The TiB2 exhibited two distinct oxidation behaviors depending on the temperature. At temperatures below 1000°C, parabolic weight gains were observed as a result of the formation of TiO2(s) and B2O3(l) on the surface. The oxidation layer comprised two layers: an inner layer of crystalline TiO2 and an outer layer mainly composed of B2O3. When the oxidation temperatures were higher than 1000°C, gaseous B2O3 was formed along with crystalline TiO2 by the oxidation process. In this case, the surface was covered with large TiO2 grains imbedded in a highly textured small TiO2 matrix.

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Oxidation Behavior of Titanium Boride at Elevated Temperatures

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