Comparison of oxide thickness of aluminium and the effects of selected alloying additions

Research output: Chapter in Book/Report/Conference proceedingConference contribution

External organisations

  • School of Metallurgy and Materials Science
  • Doncasters Precision Castings Ltd

Abstract

An experiment was undertaken to study the oxidation of liquid superpure aluminium (SPAl) and alloys containing Mg, Si, Cu and Fe. The alloys were held at 750 °C, for a number of different holding times up to 7 hours. A comparison of the oxidation of SP-Al (superpure) held at 700 °C, 750 °C and 800 °C for 3 hours was also carried out. On observation of the samples using SEM and EDX the oxides of SP-Al and the Al-Mg alloy grew quickly (by 5.8 μm after 7 hours and 2 μm after 1 hour, respectively), in a manner reported in the literature. The other alloys had reduced rates of oxide growth, with thickness changes between 30 nm and 0.25 μm for Al-Si, Al-Cu and Al-Fe alloys. Changes in holding temperature showed a thick oxide on samples held at 850 °C for 3 hours.

Details

Original languageEnglish
Title of host publicationMaterials Science Forum
Publication statusPublished - 2013
Event6th International Light Metals Technology Conference, LMT 2013 - Old Windsor, United Kingdom
Duration: 24 Jul 201326 Jul 2013

Publication series

NameMaterials Science Forum
Volume765
ISSN (Print)02555476

Conference

Conference6th International Light Metals Technology Conference, LMT 2013
CountryUnited Kingdom
CityOld Windsor
Period24/07/1326/07/13

Keywords

  • Aluminium, Double oxide film, Nucleation, Oxidation