Details

Autor(en) / Beteiligte

• Shamray, V.F.
• Sirotinkin, V.P.
• Kalita, V.I.
• Komlev, V.S.
• Barinov, S.M.
• Fedotov, A.Yu
• Gordeev, A.S.

Titel

Study of the crystal structure of hydroxyapatite in plasma coating

Ist Teil von

• Surface & coatings technology, 2019-08, Vol.372, p.201-208

Ort / Verlag

Lausanne: Elsevier B.V

Erscheinungsjahr

2019

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Layer-by-layer X-ray diffraction (XRD) and scanning electron microscopy (SEM) have been used to study a thick (~350 μm) plasma-sprayed hydroxyapatite (HA) coating deposited onto a titanium plate preheated to 300 °C. It was found that the main microstructure characteristics such as microdomain size (d) and microstrain (Δ) and the phase composition weakly change with depth. The absence of amorphous phase in the coating can be caused by the crystallization of the splats upon deposition. The HA crystal structure of the coating is substantially distorted relative to that of the parent powder. Changes in the HA crystal structure over the coating thickness relative to that of the parent HA powder are considered within a model representing the HA crystal structure as packing of Ca5(PO4)3 clusters. [Display omitted] •The lattices of the crystals in the thick hydoxyapatite (HA) plasma-spray coatings are highly distorted.•The main microstructure characteristics of the coating are: microdomain sizes d≈1000 Å and a microstrains Δ≈1•10-3.•The change of crystal structure parameters have been analyzed by the model using the Ca5 (PO4)3 cluster.