Laser surface structuring of Ti6Al4V substrates for adhesion enhancement in Ti6Al4V-PEEK joints

Bruno Henriques; Miguel Sampaio; Mihaela Buciumeanu; Júlio C.M. Souza; José R. Gomes; Filipe Silva; Oscar Carvalho

doi:10.1016/j.msec.2017.04.157

Laser surface structuring of Ti6Al4V substrates for adhesion enhancement in Ti6Al4V-PEEK joints

Bruno Henriques^*, Miguel Sampaio, Mihaela Buciumeanu, Júlio C.M. Souza, José R. Gomes, Filipe Silva, Oscar Carvalho

^*Corresponding author for this work

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

38 Citations (Scopus)

Abstract

PEEK is a promising polymer possessing high mechanical strength and biocompatibility and therefore it can be associated to titanium for biomedical applications. This study aimed at producing Ti6Al4V-PEEK joints with enhanced adhesion through laser-structuring Ti6Al4V treatments. Ti6Al4V cylindrical substrates were prepared by two types of surface treatments: alumina blasting and laser structuring. The holes number and size in laser-structured surfaces was varied. PEEK was then hot pressed against the metallic substrate to completely filling the surface cavities. The adhesion of the PEEK/Ti6Al4V joint was assessed by a shear bond strength test. Fracture surfaces and interfaces were investigated by SEM/EDS. Significant differences were found in the shear bond strength between alumina blasted and laser-structured samples. Bond strength improvement (exceeding 300%) was registered for the laser-structured specimens relative to grit-blasted ones. The laser-structuring technique showed to be very promising in the production of specifically designed surfaces for high strength and mechanically stable Ti6Al4V/PEEK joints.

Original language	English
Pages (from-to)	177-184
Number of pages	8
Journal	Materials Science and Engineering C
Volume	79
DOIs	https://doi.org/10.1016/j.msec.2017.04.157
Publication status	Published - 1 Oct 2017
Externally published	Yes

Keywords

Joint shear bond strength
PEEK
Sandblasting, surface laser structuring
Ti6Al4V

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10.1016/j.msec.2017.04.157

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title = "Laser surface structuring of Ti6Al4V substrates for adhesion enhancement in Ti6Al4V-PEEK joints",

abstract = "PEEK is a promising polymer possessing high mechanical strength and biocompatibility and therefore it can be associated to titanium for biomedical applications. This study aimed at producing Ti6Al4V-PEEK joints with enhanced adhesion through laser-structuring Ti6Al4V treatments. Ti6Al4V cylindrical substrates were prepared by two types of surface treatments: alumina blasting and laser structuring. The holes number and size in laser-structured surfaces was varied. PEEK was then hot pressed against the metallic substrate to completely filling the surface cavities. The adhesion of the PEEK/Ti6Al4V joint was assessed by a shear bond strength test. Fracture surfaces and interfaces were investigated by SEM/EDS. Significant differences were found in the shear bond strength between alumina blasted and laser-structured samples. Bond strength improvement (exceeding 300%) was registered for the laser-structured specimens relative to grit-blasted ones. The laser-structuring technique showed to be very promising in the production of specifically designed surfaces for high strength and mechanically stable Ti6Al4V/PEEK joints.",

keywords = "Joint shear bond strength, PEEK, Sandblasting, surface laser structuring, Ti6Al4V",

author = "Bruno Henriques and Miguel Sampaio and Mihaela Buciumeanu and Souza, {J{\'u}lio C.M.} and Gomes, {Jos{\'e} R.} and Filipe Silva and Oscar Carvalho",

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doi = "10.1016/j.msec.2017.04.157",

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AU - Henriques, Bruno

AU - Sampaio, Miguel

AU - Buciumeanu, Mihaela

AU - Souza, Júlio C.M.

AU - Gomes, José R.

AU - Silva, Filipe

AU - Carvalho, Oscar

PY - 2017/10/1

Y1 - 2017/10/1

N2 - PEEK is a promising polymer possessing high mechanical strength and biocompatibility and therefore it can be associated to titanium for biomedical applications. This study aimed at producing Ti6Al4V-PEEK joints with enhanced adhesion through laser-structuring Ti6Al4V treatments. Ti6Al4V cylindrical substrates were prepared by two types of surface treatments: alumina blasting and laser structuring. The holes number and size in laser-structured surfaces was varied. PEEK was then hot pressed against the metallic substrate to completely filling the surface cavities. The adhesion of the PEEK/Ti6Al4V joint was assessed by a shear bond strength test. Fracture surfaces and interfaces were investigated by SEM/EDS. Significant differences were found in the shear bond strength between alumina blasted and laser-structured samples. Bond strength improvement (exceeding 300%) was registered for the laser-structured specimens relative to grit-blasted ones. The laser-structuring technique showed to be very promising in the production of specifically designed surfaces for high strength and mechanically stable Ti6Al4V/PEEK joints.

AB - PEEK is a promising polymer possessing high mechanical strength and biocompatibility and therefore it can be associated to titanium for biomedical applications. This study aimed at producing Ti6Al4V-PEEK joints with enhanced adhesion through laser-structuring Ti6Al4V treatments. Ti6Al4V cylindrical substrates were prepared by two types of surface treatments: alumina blasting and laser structuring. The holes number and size in laser-structured surfaces was varied. PEEK was then hot pressed against the metallic substrate to completely filling the surface cavities. The adhesion of the PEEK/Ti6Al4V joint was assessed by a shear bond strength test. Fracture surfaces and interfaces were investigated by SEM/EDS. Significant differences were found in the shear bond strength between alumina blasted and laser-structured samples. Bond strength improvement (exceeding 300%) was registered for the laser-structured specimens relative to grit-blasted ones. The laser-structuring technique showed to be very promising in the production of specifically designed surfaces for high strength and mechanically stable Ti6Al4V/PEEK joints.

KW - Joint shear bond strength

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KW - Sandblasting, surface laser structuring

KW - Ti6Al4V

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ER -

Laser surface structuring of Ti6Al4V substrates for adhesion enhancement in Ti6Al4V-PEEK joints

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Keywords

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