Nucleation of intermediate phases in aluminium-silver-copper alloys

Julian M. Rosalie, Laure Bourgeois, Barry C. Muddle

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2 Citations (Scopus)


The nucleation of intermediate phases in aluminium alloys containing silver and copper has been examined. When aged isothermally these alloying elements precipitate as the metastable phases θ′(Al2Cu) and γ(Ag2Al), forming on {100} and {111} habit planes respectively. This study focuses on determining the influence of the θ′ precipitate phase upon the nucleation of the γ phase. Alloys with equimolar amounts of copper and silver show a considerably more refined distribution of the γ phase than equivalent binary aluminium-silver alloys. In addition, the θ′ precipitate is seen in close association with one or more γ particles, with the silver-rich precipitate adjoining a growth ledge of the θ′ phase. This suggests that θ′, and in particular the growth ledges, play a role in the nucleation of γ.

Original languageEnglish
Number of pages6
Publication statusPublished - 1 Dec 2005
EventInternational Conference on Solid-Solid Phase Transformations in Inorganic Materials (PTM) 2005 - Phoenix Arizona USA, Phoenix, United States of America
Duration: 29 May 20053 Jun 2005


ConferenceInternational Conference on Solid-Solid Phase Transformations in Inorganic Materials (PTM) 2005
Abbreviated titlePTM 2005
Country/TerritoryUnited States of America


  • Aluminium alloys
  • Copper
  • Nucleation
  • Silver

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