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

doi:10.1016/j.apsusc.2015.03.152

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 journal › Article › peer-review

60 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 language	English
Pages (from-to)	99-108
Number of pages	10
Journal	Applied Surface Science
Volume	345
DOIs	https://doi.org/10.1016/j.apsusc.2015.03.152
Publication status	Published - 2015
Externally published	Yes

Keywords

Corrosion
Microstructure
Ti6Al4V
TiNiZrO
Tribocorrosion

ASJC Scopus subject areas

General Chemistry
Condensed Matter Physics
General Physics and Astronomy
Surfaces and Interfaces
Surfaces, Coatings and Films

Access to Document

10.1016/j.apsusc.2015.03.152

Cite this

Obadele, B. A., Andrews, A., Mathew, M. T., Olubambi, P. A., & Pityana, S. (2015). Improving the tribocorrosion resistance of Ti6Al4V surface by laser surface cladding with TiNiZrO ₂ composite coating Applied Surface Science, 345, 99-108. https://doi.org/10.1016/j.apsusc.2015.03.152

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title = " Improving the tribocorrosion resistance of Ti6Al4V surface by laser surface cladding with TiNiZrO 2 composite coating ",

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.",

keywords = "Corrosion, Microstructure, Ti6Al4V, TiNiZrO, Tribocorrosion",

author = "Obadele, {Babatunde Abiodun} and Anthony Andrews and Mathew, {Mathew T.} and Olubambi, {Peter Apata} and Sisa Pityana",

year = "2015",

doi = "10.1016/j.apsusc.2015.03.152",

language = "English",

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Obadele, BA, Andrews, A, Mathew, MT, Olubambi, PA & Pityana, S 2015, ' Improving the tribocorrosion resistance of Ti6Al4V surface by laser surface cladding with TiNiZrO ₂ composite coating ', Applied Surface Science, vol. 345, pp. 99-108. https://doi.org/10.1016/j.apsusc.2015.03.152

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

Research output: Contribution to journal › Article › peer-review

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T1 - Improving the tribocorrosion resistance of Ti6Al4V surface by laser surface cladding with TiNiZrO 2 composite coating

AU - Obadele, Babatunde Abiodun

AU - Andrews, Anthony

AU - Mathew, Mathew T.

AU - Olubambi, Peter Apata

AU - Pityana, Sisa

PY - 2015

Y1 - 2015

N2 - 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.

AB - 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.

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