Abstract
Plasma coatings of hydroxyapatite (HA) were formed on Ti substrates in modes to obtain high mechanical properties, structural stability, and phase composition. Preheating the titanium substrate to 550°C increases the content of the equilibrium HA phase in the coating to 92%. By the DSC method, there is no local thermal effect of heat release at 723°C, as in the case of a coating sprayed onto an unheated substrate, and there is no halo in the X-ray diffraction pattern in the region of the main HA reflections. Hydrothermal treatment (HTT) of the HA coating at 650°C increases the HA content to 98%, regardless of the temperature of the preheating of the Ti substrate. Regardless of the state of the coatings, there is a gradual release of heat in DSC studies in the range of 450–1000°C, which increases after hydrothermal treatment. This phenomenon requires additional research. The crystallite size in the sprayed coatings of 42.1–43.1 nm increases to 64.4–68.3 nm after HTT is comparable to the crystallite size of 57.4 nm in the sprayed powder. After HTT of coating, the tricalcium phosphate phase is absent.
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The study was supported by the Russian Science Foundation (project no. 20-19-00671).
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Chueva, T.R., Gamurar, N.V., Kalita, V.I. et al. Influence of Titanium Substrate Temperature on Phase Structure of a Plasma Hydroxyapatite Coating. Inorg. Mater. Appl. Res. 13, 386–392 (2022). https://doi.org/10.1134/S2075113322020113
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DOI: https://doi.org/10.1134/S2075113322020113