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Low-temperature synthesis of (TiC + Al2O3)/Al alloy composites based on dopant-assisted combustion

Authors
Son, Seong-GukLee, Byeong-HyeonLee, Jung-MooLee, Jae-Chul
Issue Date
15-11월-2015
Publisher
ELSEVIER SCIENCE SA
Keywords
In-situ processing; Metal matrix composite; Combustion reaction; Al alloy
Citation
JOURNAL OF ALLOYS AND COMPOUNDS, v.649, pp.409 - 416
Indexed
SCIE
SCOPUS
Journal Title
JOURNAL OF ALLOYS AND COMPOUNDS
Volume
649
Start Page
409
End Page
416
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/91896
DOI
10.1016/j.jallcom.2015.05.153
ISSN
0925-8388
Abstract
A feasible approach to fabricate an Al alloy composite reinforced with TiC and Al2O3 (hereinafter, (TiC + Al2O3)/Al alloy composite) based on in-situ processing at low temperatures was proposed. With appropriate amounts of excess Al added to the (4Al + 3TiO(2) + 3C) powder system, the spontaneous combustion reactions for forming TiC and Al2O3 were promoted, whereas a small amount of CuO added to the reagent powders caused triggering of the combustion reaction at lower temperatures (860 degrees C), which was thereafter self-maintaining. The TiC and Al2O3 particles thus formed could be dispersed uniformly in the Al matrix and contributed to a considerable increase in the strength and stiffness of the resultant composite material, demonstrating the feasibility of the proposed technique for producing metal matrix composites for load-bearing applications. In this study, we report the method used to fabricate the (TiC + Al2O3)/Al alloy composite at low temperatures, its synthesis, and the resultant properties. (C) 2015 Elsevier B.V. All rights reserved.
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공과대학 (신소재공학부)
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