Tailoring the Surface Morphology and the Crystallinity State of Cu- and Zn-Substituted Hydroxyapatites on Ti and Mg-Based Alloys; Materials; Vol. 13, iss. 19

Tailoring the Surface Morphology and the Crystallinity State of Cu- and Zn-Substituted Hydroxyapatites on Ti and Mg-Based Alloys; Materials; Vol. 13, iss. 19

Dades bibliogràfiques
Parent link:Materials
Vol. 13, iss. 19.— 2020.— [4449, 20 p.]
Autor corporatiu: Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов
Altres autors: Prosolov K. A. Konstantin Alexandrovich, Lastovka V. V. Vladimir Viktorovich, Belyavskaya O. A. Olga Andreevna, Lychagin D. V. Dmitry Vasilievich, Schmidt J. Jurgen, Sharkeev Yu. P. Yury Petrovich
Sumari:Title screen
Titanium-based alloys are known as a “gold standard” in the field of implantable devices. Mg-based alloys, in turn, are very promising biocompatible material for biodegradable, temporary implants. However, the clinical application of Mg-based alloys is currently limited due to the rapid resorption rate in the human body. The deposition of a barrier layer in the form of bioactive calcium phosphate coating is proposed to decelerate Mg-based alloys resorption. The dissolution rate of calcium phosphates is strongly affected by their crystallinity and structure. The structure of antibacterial Cu- and Zn-substituted hydroxyapatite deposited by an radiofrequency (RF) magnetron sputtering on Ti and Mg–Ca substrates is tailored by post-deposition heat treatment and deposition at increased substrate temperatures. It is established that upon an increase in heat treatment temperature mean crystallite size decreases from 47 ± 17 to 13 ± 9 nm. The character of the crystalline structure is not only governed by the temperature itself but relies on the condition such as either post-deposition treatment, where an amorphous calcium phosphate undergoes crystallization or instantaneous crystalline coating growth during deposition on the hot substrate. A higher treatment temperature at 700 °C results in local coating micro-cracking and induced defects, while the temperature of 400–450 °C resulted in the formation of dense, void-free structure.
Idioma:anglès
Publicat: 2020
Matèries:
электронный ресурс
труды учёных ТПУ
RF-magnetron sputtering
calcium phosphate
TEM
annealing
biomaterials
ВЧ-магнетронное распыление
фосфат кальция
отжиг
биоматериалы
Accés en línia:https://doi.org/10.3390/ma13194449
Format: Electrònic Capítol de llibre
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=666121

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