High frequency pulse anodising of magnetron sputtered Al–Zr and Al–Ti Coatings

Visweswara Chakravarthy Gudla, Kirill Bordo, Sara Engberg, Kristian Rechendorff, Rajan Ambat

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

High frequency pulse anodising of Al–Zr and Al–Ti coatings is studied as a surface finishing technique and compared to conventional decorative DC anodising. The Al–Zr and Al–Ti coatings were deposited using DC magnetron sputtering and were heat treated after deposition to generate a multiphase microstructure with Al3Zr and Al3Ti intermetallic phases in α-Al matrix. The effect of the Zr/Ti content and the anodising potential on the anodising rate, the optical appearance and the microstructure is investigated. Characterisation of the surfaces was performed using transmission electron microscopy, grazing incidence X-ray diffraction and the optical appearance was quantified using an integrating sphere-spectrometer setup. The anodising rate and the surface reflectance of the anodised surfaces were found to be increasing with anodising potential. Anodised layer was more homogeneous in terms of degree of oxidation of the intermetallic phases for high frequency pulse anodising when compared to conventional DC anodising.
Original languageEnglish
JournalMaterials & Design
Volume95
Pages (from-to)340-347
ISSN0264-1275
DOIs
Publication statusPublished - 2016

Keywords

  • Aluminium
  • Zirconium
  • Titanium
  • Pulse Anodising
  • TEM
  • Intermetallic

Cite this

Gudla, Visweswara Chakravarthy ; Bordo, Kirill ; Engberg, Sara ; Rechendorff, Kristian ; Ambat, Rajan. / High frequency pulse anodising of magnetron sputtered Al–Zr and Al–Ti Coatings. In: Materials & Design. 2016 ; Vol. 95. pp. 340-347.
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title = "High frequency pulse anodising of magnetron sputtered Al–Zr and Al–Ti Coatings",
abstract = "High frequency pulse anodising of Al–Zr and Al–Ti coatings is studied as a surface finishing technique and compared to conventional decorative DC anodising. The Al–Zr and Al–Ti coatings were deposited using DC magnetron sputtering and were heat treated after deposition to generate a multiphase microstructure with Al3Zr and Al3Ti intermetallic phases in α-Al matrix. The effect of the Zr/Ti content and the anodising potential on the anodising rate, the optical appearance and the microstructure is investigated. Characterisation of the surfaces was performed using transmission electron microscopy, grazing incidence X-ray diffraction and the optical appearance was quantified using an integrating sphere-spectrometer setup. The anodising rate and the surface reflectance of the anodised surfaces were found to be increasing with anodising potential. Anodised layer was more homogeneous in terms of degree of oxidation of the intermetallic phases for high frequency pulse anodising when compared to conventional DC anodising.",
keywords = "Aluminium , Zirconium, Titanium, Pulse Anodising , TEM, Intermetallic",
author = "Gudla, {Visweswara Chakravarthy} and Kirill Bordo and Sara Engberg and Kristian Rechendorff and Rajan Ambat",
year = "2016",
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journal = "Materials & Design",
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High frequency pulse anodising of magnetron sputtered Al–Zr and Al–Ti Coatings. / Gudla, Visweswara Chakravarthy; Bordo, Kirill; Engberg, Sara; Rechendorff, Kristian; Ambat, Rajan.

In: Materials & Design, Vol. 95, 2016, p. 340-347.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - High frequency pulse anodising of magnetron sputtered Al–Zr and Al–Ti Coatings

AU - Gudla, Visweswara Chakravarthy

AU - Bordo, Kirill

AU - Engberg, Sara

AU - Rechendorff, Kristian

AU - Ambat, Rajan

PY - 2016

Y1 - 2016

N2 - High frequency pulse anodising of Al–Zr and Al–Ti coatings is studied as a surface finishing technique and compared to conventional decorative DC anodising. The Al–Zr and Al–Ti coatings were deposited using DC magnetron sputtering and were heat treated after deposition to generate a multiphase microstructure with Al3Zr and Al3Ti intermetallic phases in α-Al matrix. The effect of the Zr/Ti content and the anodising potential on the anodising rate, the optical appearance and the microstructure is investigated. Characterisation of the surfaces was performed using transmission electron microscopy, grazing incidence X-ray diffraction and the optical appearance was quantified using an integrating sphere-spectrometer setup. The anodising rate and the surface reflectance of the anodised surfaces were found to be increasing with anodising potential. Anodised layer was more homogeneous in terms of degree of oxidation of the intermetallic phases for high frequency pulse anodising when compared to conventional DC anodising.

AB - High frequency pulse anodising of Al–Zr and Al–Ti coatings is studied as a surface finishing technique and compared to conventional decorative DC anodising. The Al–Zr and Al–Ti coatings were deposited using DC magnetron sputtering and were heat treated after deposition to generate a multiphase microstructure with Al3Zr and Al3Ti intermetallic phases in α-Al matrix. The effect of the Zr/Ti content and the anodising potential on the anodising rate, the optical appearance and the microstructure is investigated. Characterisation of the surfaces was performed using transmission electron microscopy, grazing incidence X-ray diffraction and the optical appearance was quantified using an integrating sphere-spectrometer setup. The anodising rate and the surface reflectance of the anodised surfaces were found to be increasing with anodising potential. Anodised layer was more homogeneous in terms of degree of oxidation of the intermetallic phases for high frequency pulse anodising when compared to conventional DC anodising.

KW - Aluminium

KW - Zirconium

KW - Titanium

KW - Pulse Anodising

KW - TEM

KW - Intermetallic

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JO - Materials & Design

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SN - 0264-1275

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