Role of excess Al on the combustion reaction in the Al-TiO2-C system

Je Woo Kim; Jung Moo Lee; Joon Ho Lee; Jae Chul Lee

doi:10.1007/s12540-014-6020-8

Role of excess Al on the combustion reaction in the Al-TiO₂-C system

Je Woo Kim, Jung Moo Lee, Joon Ho Lee, Jae Chul Lee

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

14 Citations (Scopus)

Abstract

Of various systems that utilize a self-propagating high-temperature synthesis, the Al-TiO₂-C system is representative of in-situ production of metal matrix composites reinforced with TiC and Al₂O₃. Contrary to common understanding, however, the following reaction 4Al + 3TiO₂ + 3C→3TiC + 2Al₂O₃ is infeasible in the Al-TiO₂-C system with the given stoichiometric composition of 4Al + 3TiO₂ + 3C. Experiments have shown that the formation of TiC and Al₂O₃ is feasible only in an Al-TiO₂-C system that contains a certain amount of excess Al. In this study, the mechanism of the reactions in the Al-TiO₂-C system was elucidated in order to explain why excess Al is needed to promote the formation of TiC and Al₂O₃. We also estimated the amount of excess Al that is necessary to promote the complete transformation of the Al-TiO₂-C powders to TiC and Al₂O₃.

Original language	English
Pages (from-to)	1151-1156
Number of pages	6
Journal	Metals and Materials International
Volume	20
Issue number	6
DOIs	https://doi.org/10.1007/s12540-014-6020-8
Publication status	Published - 2014 Nov 16

Bibliographical note

Funding Information:
This research was supported by a Grant (No. 10037308) from the Fundamental R&D Program for Core Technology of Materials, funded by the Ministry of Knowledge Economy, Republic of Korea.

Publisher Copyright:
© 2014, The Korean Institute of Metals and Materials and Springer Science+Business Media Dordrecht.

Keywords

X-ray diffraction
alloys
composites
differential thermal analysis
metal matrix composites

ASJC Scopus subject areas

Condensed Matter Physics
Mechanics of Materials
Metals and Alloys
Materials Chemistry

Access to Document

10.1007/s12540-014-6020-8

Cite this

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title = "Role of excess Al on the combustion reaction in the Al-TiO2-C system",

abstract = "Of various systems that utilize a self-propagating high-temperature synthesis, the Al-TiO2-C system is representative of in-situ production of metal matrix composites reinforced with TiC and Al2O3. Contrary to common understanding, however, the following reaction 4Al + 3TiO2 + 3C→3TiC + 2Al2O3 is infeasible in the Al-TiO2-C system with the given stoichiometric composition of 4Al + 3TiO2 + 3C. Experiments have shown that the formation of TiC and Al2O3 is feasible only in an Al-TiO2-C system that contains a certain amount of excess Al. In this study, the mechanism of the reactions in the Al-TiO2-C system was elucidated in order to explain why excess Al is needed to promote the formation of TiC and Al2O3. We also estimated the amount of excess Al that is necessary to promote the complete transformation of the Al-TiO2-C powders to TiC and Al2O3.",

keywords = "X-ray diffraction, alloys, composites, differential thermal analysis, metal matrix composites",

author = "Kim, {Je Woo} and Lee, {Jung Moo} and Lee, {Joon Ho} and Lee, {Jae Chul}",

note = "Funding Information: This research was supported by a Grant (No. 10037308) from the Fundamental R&D Program for Core Technology of Materials, funded by the Ministry of Knowledge Economy, Republic of Korea. Publisher Copyright: {\textcopyright} 2014, The Korean Institute of Metals and Materials and Springer Science+Business Media Dordrecht.",

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doi = "10.1007/s12540-014-6020-8",

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AU - Lee, Jung Moo

AU - Lee, Joon Ho

AU - Lee, Jae Chul

N1 - Funding Information: This research was supported by a Grant (No. 10037308) from the Fundamental R&D Program for Core Technology of Materials, funded by the Ministry of Knowledge Economy, Republic of Korea. Publisher Copyright: © 2014, The Korean Institute of Metals and Materials and Springer Science+Business Media Dordrecht.

PY - 2014/11/16

Y1 - 2014/11/16

N2 - Of various systems that utilize a self-propagating high-temperature synthesis, the Al-TiO2-C system is representative of in-situ production of metal matrix composites reinforced with TiC and Al2O3. Contrary to common understanding, however, the following reaction 4Al + 3TiO2 + 3C→3TiC + 2Al2O3 is infeasible in the Al-TiO2-C system with the given stoichiometric composition of 4Al + 3TiO2 + 3C. Experiments have shown that the formation of TiC and Al2O3 is feasible only in an Al-TiO2-C system that contains a certain amount of excess Al. In this study, the mechanism of the reactions in the Al-TiO2-C system was elucidated in order to explain why excess Al is needed to promote the formation of TiC and Al2O3. We also estimated the amount of excess Al that is necessary to promote the complete transformation of the Al-TiO2-C powders to TiC and Al2O3.

AB - Of various systems that utilize a self-propagating high-temperature synthesis, the Al-TiO2-C system is representative of in-situ production of metal matrix composites reinforced with TiC and Al2O3. Contrary to common understanding, however, the following reaction 4Al + 3TiO2 + 3C→3TiC + 2Al2O3 is infeasible in the Al-TiO2-C system with the given stoichiometric composition of 4Al + 3TiO2 + 3C. Experiments have shown that the formation of TiC and Al2O3 is feasible only in an Al-TiO2-C system that contains a certain amount of excess Al. In this study, the mechanism of the reactions in the Al-TiO2-C system was elucidated in order to explain why excess Al is needed to promote the formation of TiC and Al2O3. We also estimated the amount of excess Al that is necessary to promote the complete transformation of the Al-TiO2-C powders to TiC and Al2O3.

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