Reaction kinetics in the combustion synthesis of Al-Ir-Ni intermetallic compounds

Kai Cai, Machiko Ode, Hideyuki Murakami

Research output: Contribution to journalArticle

Abstract

The combustion synthesis of Al50 Ir48Ni2 (at.%) was conducted at different heating rates in both a differential scanning calorimetry (DSC) chamber and a vacuum furnace. It was found that a higher heating rate, a sufficient amount of reactant powder, and effective control of the heat loss facilitated the complete reaction and resulted in combusted single IrAl phase products. Otherwise, multiphase products containing IrAl, unreacted Ir, and Al3Ir were synthesized. The reactions involved in different processes were discussed in terms of the thermal competition between heat generation and loss during the reaction. All ignition temperatures were below 773 K, indicating that the combustion reaction occurs at the solid-solid state. With increasing heating rate, the ignition temperature increased while the product density decreased.

Original languageEnglish
Pages (from-to)1953-1960
Number of pages8
JournalJournal of Materials Research
Volume23
Issue number7
DOIs
Publication statusPublished - 2008 Jul 1
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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