TY - JOUR
T1 - Tailoring the surface morphology and the crystallinity state of cu-and zn-substituted hydroxyapatites on Ti and Mg-based alloys
AU - Prosolov, Konstantin A.
AU - Lastovka, Vladimir V.
AU - Belyavskaya, Olga A.
AU - Lychagin, Dmitry V.
AU - Schmidt, Juergen
AU - Sharkeev, Yurii P.
N1 - Funding Information:
Funding: This research was funded by to the Government research assignment for ISPMS SB RAS, project No. III.23.2.5.
Publisher Copyright:
© 2020 by the authors. Licensee MDPI, Basel, Switzerland.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/10/1
Y1 - 2020/10/1
N2 - 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.
AB - 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.
KW - Annealing
KW - Biomaterials
KW - Calcium phosphate
KW - RF-magnetron sputtering
KW - TEM
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U2 - 10.3390/ma13194449
DO - 10.3390/ma13194449
M3 - Article
AN - SCOPUS:85093943793
VL - 13
SP - 1
EP - 20
JO - Materials
JF - Materials
SN - 1996-1944
IS - 19
M1 - 4449
ER -