A study of r.f.-sputtered Al and Ni thin films on AZ91D magnesium alloy
Resource
Surface & Coatings Technology 2006(200), 2769–2774
Journal
Surface & Coatings Technology 2006(200), 2769–2774
Pages
-
Date Issued
2006
Date
2006
Author(s)
Wu, S.K.
Yen, S.C.
Chou, T.S.
DOI
246246/2006111501243709
Abstract
Pure Al and Ni thin films have been successfully r.f.-sputtered on AZ91D substrate. After 350 8C24-h heat treatment in a high vacuum,
the 2 Am thickness of the Al film reacted completely with the substrate to form Al12Mg17 phase. However, the Ni film was not observed to
form a reactive layer after 350 8C48-h treatment. Scratch test results indicate that the cohesive strength exhibits a significant improvement
after the 350 8C48-h treatment for the Ni film. The hardness tests demonstrated that the Ni film is harder than the Al film, AZ91D and
Al12Mg17 phase. The sliding wear tests also showed that the Ni film has a lower wear rate than the others. The intrinsic brittleness of
Al12Mg17 phase has a low cohesive strength with the substrate and a poor wear resistance to grinding.
Subjects
Scratch test
Vicker’s hardness test
Block on disk
X-ray diffraction
Sputtering
Magnesium alloy AZ91D
Publisher
Taipei:National Taiwan University Coll Elect Engn
Type
journal article
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