Al2O3/Al composites produced by directed melt oxidation using Zn containing external dopants

Roslinda Shamsudin, R. J. Hand

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Al2O3/Al composites have been produced by the directed melt oxidation of Al with externally applied Zn containing dopants. Zn, ZnO and ZnAl2O4 are all shown to be capable of initiating the directed melt oxidation of Al without any Mg being present. The external surfaces of the reaction products were covered with a layer of ZnO overlaying a layer of ZnAl2O4, however, no Zn was observed within the composite bodies. Doping with ZnO or ZnAl2O4 resulted in a fine, dense ceramic microstructure and the amount of growth increased with increasing firing time and increasing ZnO or ZnAl2O4 content. Doping with Zn resulted in significantly less dense composites to those produced using ZnO or ZnAl2O4 and thus in the Zn system oxide and spinel dopants offer a significant advantage over using metallic Zn.

Original languageEnglish
Pages (from-to)1613-1619
Number of pages7
JournalJournal of Materials Science
Volume36
Issue number7
DOIs
Publication statusPublished - 1 Apr 2001

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Doping (additives)
Oxidation
Composite materials
Reaction products
Oxides
Microstructure

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Al2O3/Al composites produced by directed melt oxidation using Zn containing external dopants. / Shamsudin, Roslinda; Hand, R. J.

In: Journal of Materials Science, Vol. 36, No. 7, 01.04.2001, p. 1613-1619.

Research output: Contribution to journalArticle

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