Improving the tribocorrosion resistance of Ti6Al4V surface by laser surface cladding with TiNiZrO 2 composite coating

Babatunde Abiodun Obadele, Anthony Andrews, Mathew T. Mathew, Peter Apata Olubambi, Sisa Pityana

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Ti6Al4V alloy was laser cladded with titanium, nickel and zirconia powders in different ratio using a 2 kW CW ytterbium laser system (YLS). The microstructures of the cladded layers were examined using field emission scanning electron microscopy (FESEM) equipped with energy dispersive X-ray spectroscopy (EDS) and X-ray diffractometry (XRD). Corrosion and tribocorrosion tests were performed on the cladded surface in 1 M H 2 SO 4 solution. The microstructure revealed the transformation from a dense dendritic structure in TiNi coating to a flower-like structure observed in TiNiZrO 2 cladded layers. There was a significant increase in surface microindentation hardness values of the cladded layers due to the present of hard phase ZrO 2 particles. The results obtained show that addition of ZrO 2 improves the corrosion resistance property of TiNi coating but decrease the tribocorrosion resistance property. The surface hardening effect induced by ZrO 2 addition, combination of high hardness of Ti 2 Ni phase could be responsible for the mechanical degradation and chemical wear under sliding conditions.

Original languageEnglish
Pages (from-to)99-108
Number of pages10
JournalApplied Surface Science
Volume345
DOIs
Publication statusPublished - Jan 1 2015
Externally publishedYes

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Composite coatings
coatings
composite materials
Lasers
hardness
Ytterbium
Hardness
lasers
Coatings
corrosion tests
microstructure
Microstructure
ytterbium
Titanium
Nickel
zirconium oxides
corrosion resistance
Zirconia
hardening
Field emission

All Science Journal Classification (ASJC) codes

  • Surfaces, Coatings and Films

Cite this

Obadele, Babatunde Abiodun ; Andrews, Anthony ; Mathew, Mathew T. ; Olubambi, Peter Apata ; Pityana, Sisa. / Improving the tribocorrosion resistance of Ti6Al4V surface by laser surface cladding with TiNiZrO 2 composite coating. In: Applied Surface Science. 2015 ; Vol. 345. pp. 99-108.
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Improving the tribocorrosion resistance of Ti6Al4V surface by laser surface cladding with TiNiZrO 2 composite coating. / Obadele, Babatunde Abiodun; Andrews, Anthony; Mathew, Mathew T.; Olubambi, Peter Apata; Pityana, Sisa.

In: Applied Surface Science, Vol. 345, 01.01.2015, p. 99-108.

Research output: Contribution to journalArticle

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