Calcium silicate layer on titanium fabricated by electrospray deposition

Csaba Buga, M. Hunyadi, Zoltán Gácsi, Csaba Hegedűs, József Hakl, Ute Schmidt, Shinn Jyh Ding, A. Csík

Research output: Article

Abstract

Titanium and its alloys have been used as implant materials. Non-ideal osseointegration of the implant materials has facilitated the development of the bioactive coatings on the implant surfaces. In this work, the bioactive calcium silicate (CaSi) powder prepared in a green synthesis route was used to cover the surface of Ti implants by a facile electrospray deposition method. Post annealing in air was also applied to form the oxidation layer on the Ti surface with the aim of increasing the bond strength between the CaSi coating layer and Ti substrate. For the characterization of the coatings several analytical methods such as X-ray diffraction, scanning electron microscopy, secondary neutral mass spectrometry, and Raman-spectroscopy were used, in addition to the measurement of bond strength and corrosion resistance. The results indicated a uniform CaSi layer with a thickness of about 1 μm deposited on the Ti substrate. Annealing in the range of 700–900 °C in air resulted in the formation of rutile phase of TiO2; more importantly, annealing at 800 °C did not significantly affect the composition of the CaSi layer consisting of β-Ca2SiO4. The bond strength between the coating layer and Ti substrate can be remarkably enhanced at an annealing temperature of 700 or 800 °C compared with the as-prepared coating without annealing. The annealed coatings had a better corrosion resistance than the as-prepared coating. It is concluded that the electrospray method associated with the post-annealing can be successfully used for the deposition of a CaSi layer with a defined structure and composition on titanium implants.

Original languageEnglish
Pages (from-to)401-408
Number of pages8
JournalMaterials Science and Engineering C
Volume98
DOIs
Publication statusPublished - máj. 1 2019

Fingerprint

calcium silicates
Calcium silicate
Titanium
titanium
coatings
Coatings
Annealing
annealing
activity (biology)
corrosion resistance
Corrosion resistance
Substrates
air
Bond strength (materials)
titanium alloys
Air
calcium silicate
Chemical analysis
Titanium alloys
rutile

Keywords

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

    Cite this

    Calcium silicate layer on titanium fabricated by electrospray deposition. / Buga, Csaba; Hunyadi, M.; Gácsi, Zoltán; Hegedűs, Csaba; Hakl, József; Schmidt, Ute; Ding, Shinn Jyh; Csík, A.

    In: Materials Science and Engineering C, Vol. 98, 01.05.2019, p. 401-408.

    Research output: Article

    Buga, Csaba ; Hunyadi, M. ; Gácsi, Zoltán ; Hegedűs, Csaba ; Hakl, József ; Schmidt, Ute ; Ding, Shinn Jyh ; Csík, A. / Calcium silicate layer on titanium fabricated by electrospray deposition. In: Materials Science and Engineering C. 2019 ; Vol. 98. pp. 401-408.
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    AU - Buga, Csaba

    AU - Hunyadi, M.

    AU - Gácsi, Zoltán

    AU - Hegedűs, Csaba

    AU - Hakl, József

    AU - Schmidt, Ute

    AU - Ding, Shinn Jyh

    AU - Csík, A.

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    AB - Titanium and its alloys have been used as implant materials. Non-ideal osseointegration of the implant materials has facilitated the development of the bioactive coatings on the implant surfaces. In this work, the bioactive calcium silicate (CaSi) powder prepared in a green synthesis route was used to cover the surface of Ti implants by a facile electrospray deposition method. Post annealing in air was also applied to form the oxidation layer on the Ti surface with the aim of increasing the bond strength between the CaSi coating layer and Ti substrate. For the characterization of the coatings several analytical methods such as X-ray diffraction, scanning electron microscopy, secondary neutral mass spectrometry, and Raman-spectroscopy were used, in addition to the measurement of bond strength and corrosion resistance. The results indicated a uniform CaSi layer with a thickness of about 1 μm deposited on the Ti substrate. Annealing in the range of 700–900 °C in air resulted in the formation of rutile phase of TiO2; more importantly, annealing at 800 °C did not significantly affect the composition of the CaSi layer consisting of β-Ca2SiO4. The bond strength between the coating layer and Ti substrate can be remarkably enhanced at an annealing temperature of 700 or 800 °C compared with the as-prepared coating without annealing. The annealed coatings had a better corrosion resistance than the as-prepared coating. It is concluded that the electrospray method associated with the post-annealing can be successfully used for the deposition of a CaSi layer with a defined structure and composition on titanium implants.

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