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Influence of Substrate Temperature and Hydrothermal Treatment on the Phase Composition of Plasma-Sprayed Phosphate Coatings

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Abstract—

Phosphate coatings have been produced by plasma-spraying hydroxyapatite (HA) and tricalcium phosphate (TCP) powders onto Ti substrates at initial temperatures of 20, 300, and 550°C, followed by hydrothermal treatment (HTT) at 650°C, and the variation in the phase composition of the coatings has been examined in relation to the phase composition of the plasma-sprayed powders: 100 wt % HA, 100 wt % α‑TCP, and 100 wt % β-TCP. The as-prepared coatings produced by plasma-spraying the HA powder consisted of 87–91 wt % HA and 9–13 wt % CaO, and after HTT their phase composition was 89–93 wt % HA and 7–11 wt % CaO. The coatings produced by plasma-spraying the α-TCP powder at initial substrate temperatures from 20 to 550°C consisted entirely of a crystalline α-TCP phase. The coatings produced by plasma-spraying the β-TCP powder consisted of both β-TCP and α-TCP, and the content of the latter phase decreased from 100 to 80% as the substrate temperature was raised from 20 to 550°C. After HTT, the coatings contained 26–28% HA, independent of the phase composition of the starting TCP powders.

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Funding

This work was supported by the Russian Science Foundation, project no. 20-19-00671.

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Authors and Affiliations

  1. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, 119334, Moscow, Russia

    V. I. Kalita, D. I. Komlev, A. A. Radyuk, V. S. Komlev, V. F. Shamrai, V. P. Sirotinkin & A. Yu. Fedotov

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  1. V. I. Kalita
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  2. D. I. Komlev
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  3. A. A. Radyuk
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  4. V. S. Komlev
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  5. V. F. Shamrai
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  6. V. P. Sirotinkin
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  7. A. Yu. Fedotov
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Correspondence to V. I. Kalita.

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Translated by O. Tsarev

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Kalita, V.I., Komlev, D.I., Radyuk, A.A. et al. Influence of Substrate Temperature and Hydrothermal Treatment on the Phase Composition of Plasma-Sprayed Phosphate Coatings. Inorg Mater 57, 598–602 (2021). https://doi.org/10.1134/S0020168521060030

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  • DOI: https://doi.org/10.1134/S0020168521060030

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