Structure of magnetron hydroxyapatite films with small stoichiometry deviation
| Autor: | Mikhailov, I.F., Starikov, V.V., Baturin, A.A. |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science substructure 02 engineering and technology Characterization and properties 021001 nanoscience & nanotechnology 01 natural sciences phase composition Crystallography micro-strain 0103 physical sciences Cavity magnetron chemical composition General Materials Science hydroxyapatite coating 0210 nano-technology Stoichiometry |
| Popis: | Phase composition, coherence lengths and micro-strain level in hydroxyapatite films with controlled deviation from stoichiometry (Ca/P = 1.67) were measured by methods of X-ray diffraction and X-ray fluorescent analysis. It was established that at Ca/P = 1.6±0.03, hydroxyapatite layers with thickness 2m on the niobium substrates were practically single-phase but differed by the coherence lengths and micro-strain levels for different crystallographic directions: the coherence length along [001] was commensurable with the film thickness and much exceeded the values for [101] and [111] directions. The micro-strain level ε for [001] direction reached (1.3÷1.7)·10⁻³ being by an order higher than for [101] and [111] directions. That testifies constrained growth conditions along [001] with the high homogeneity of the lattice period of the hydroxyapatite film. |
| Databáze: | OpenAIRE |
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