Structure of magnetron hydroxyapatite films with small stoichiometry deviation
Шифр та назва спеціальності
STC "Institute for Single Crystals"
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 was commensurable with the film thickness and much exceeded the values for and directions. The micro-strain level ε for direction reached (1.3÷1.7)·10-3 being by an order higher than for and directions. That testifies constrained growth conditions along with the high homogeneity of the lattice period of the hydroxyapatite film.
hydroxyapatite coating, chemical composition, phase composition, substructure, micro-strain
Mikhailov I. F. Structure of magnetron hydroxyapatite films with small stoichiometry deviation / I. F. Mikhailov, V. V. Starikov, A. A. Baturin // Functional Materials. – 2016. – Vol. 23, No. 3. – P. 394-397.