Experimental study of thermal oxidation of nanoscale alloys of aluminium and zinc (nAlZn)

Aluminium-based alloys have wide applications but little is known about the thermal-chemical kinetics of nanoalloys. This work investigated the thermal oxidation of Zn and Al nanoalloys (nAlZn) with a BET equivalent diameter of 141nm through the simultaneous TGA/DSC method. The thermal analysis was...

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Bibliographic Details
Published inThe Journal of physics and chemistry of solids Vol. 85; pp. 188 - 196
Main Authors Noor, Fahad, Wen, Dongsheng
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.10.2015
Subjects
Alloys
Nanostructures
Thermodynamic properties
Thermogravimetric analysis (TGA)
Thermogravimetric analysis (TGA)
Nanostructures
Thermodynamic properties
Alloys
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Summary:Aluminium-based alloys have wide applications but little is known about the thermal-chemical kinetics of nanoalloys. This work investigated the thermal oxidation of Zn and Al nanoalloys (nAlZn) with a BET equivalent diameter of 141nm through the simultaneous TGA/DSC method. The thermal analysis was combined with elemental, morphology and crystalline structure analysis to elucidate the reaction mechanisms. It was found that the complete oxidation of nAlZn in air can be characterised by a three-stage process, including two endothermic and three exothermic reactions. With the help of ex-situ XRD, different reaction pathways were proposed for different stages, forming the end products of ZnO and ZnAl2O4. The reactivity comparison between Al and nAlZn suggested that different criteria should be used for different applications.
ISSN:0022-3697
1879-2553
DOI:10.1016/j.jpcs.2015.05.004