Low-temperature synthesis of (TiC + Al<inf>2</inf>O<inf>3</inf>)/Al alloy composites based on dopant-assisted combustion

Seong Guk Son, Byeong Hyeon Lee, Jung Moo Lee, Jae-chul Lee

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

A feasible approach to fabricate an Al alloy composite reinforced with TiC and Al<inf>2</inf>O<inf>3</inf> (hereinafter, (TiC + Al<inf>2</inf>O<inf>3</inf>)/Al alloy composite) based on in-situ processing at low temperatures was proposed. With appropriate amounts of excess Al added to the (4Al + 3TiO<inf>2</inf> + 3C) powder system, the spontaneous combustion reactions for forming TiC and Al<inf>2</inf>O<inf>3</inf> were promoted, whereas a small amount of CuO added to the reagent powders caused triggering of the combustion reaction at lower temperatures (860°C), which was thereafter self-maintaining. The TiC and Al<inf>2</inf>O<inf>3</inf> 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 + Al<inf>2</inf>O<inf>3</inf>)/Al alloy composite at low temperatures, its synthesis, and the resultant properties.

Original languageEnglish
Pages (from-to)409-416
Number of pages8
JournalJournal of Alloys and Compounds
Volume649
DOIs
Publication statusPublished - 2015 Jul 30

Keywords

  • Al alloy
  • Combustion reaction
  • In-situ processing
  • Metal matrix composite

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Chemistry
  • Metals and Alloys

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