Ultrathin film coating of hydroxyapatite (HA) on a magnesium–calcium alloy using RF magnetron sputtering for bioimplant applications

Сурменева, М. А.; Mukhametkaliyev, T.M.; Khakbaz, Hadis; Surmenev, Roman A.; Kannan, M. Bobby

doi:10.1016/j.matlet.2015.03.140

Cited by 64 publications

(26 citation statements)

References 20 publications

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“…The cathodic current was significantly lower for the coated magnesium-calcium alloy, and as a result, the corrosion current density (i corr ) for the coated alloy was~98 % lower than that of the bare alloy (from 90 AE 14.1 μA/cm 2 to 1.8 AE 1.8 μA/cm 2 ) [85]. The degradation rate for the coated magnesium-calcium alloy was~0.04 mm/year and~2.07 mm/year for the bare alloy [85]. Thus, the decrease in the degradation rate due to the ultrathin coating is significantly high, which makes the coating technique very attractive for the magnesium-calcium alloy.…”

Section: Specific Aspects Related To the Bioceramic Coatings Ultrathimentioning

confidence: 94%

“…In addition, the polarization resistance (R p ) of the magnesium-calcium alloy (1 wt% Ca) coated with HA films with the thickness ranging from 550 to 750 nm was found to be more than two orders of magnitude higher under in vitro conditions as compared to that of the bare alloy, i.e., R p = 63,346 AE 13,422 Ω.cm 2 for coated sample and R p = 413 AE 11 Ω.cm 2 for bare alloy [85]. The cathodic current was significantly lower for the coated magnesium-calcium alloy, and as a result, the corrosion current density (i corr ) for the coated alloy was~98 % lower than that of the bare alloy (from 90 AE 14.1 μA/cm 2 to 1.8 AE 1.8 μA/cm 2 ) [85]. The degradation rate for the coated magnesium-calcium alloy was~0.04 mm/year and~2.07 mm/year for the bare alloy [85].…”

Section: Specific Aspects Related To the Bioceramic Coatings Ultrathimentioning

confidence: 97%

“…Furthermore, in case of NiTi substrates, an average nickel release rate from the samples, with a dense crystalline~600 nm thick HA coating deposited by RF magnetron sputtering, was reduced by 7-10 times compared to the uncoated substrates [83]. Therefore, the HA film deposited via RF magnetron sputtering onto the biodegradable materials was investigated as a potential candidate in order to be used as protective coatings against corrosion [84,85].…”

Section: Specific Aspects Related To the Bioceramic Coatings Ultrathimentioning

confidence: 99%

See 2 more Smart Citations

Bioceramic Coatings for Metallic Implants

Vlădescu

Surmeneva

Cotruț

et al. 2016

Handbook of Bioceramics and Biocomposites

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Section: Specific Aspects Related To the Bioceramic Coatings Ultrathimentioning

confidence: 94%

Section: Specific Aspects Related To the Bioceramic Coatings Ultrathimentioning

confidence: 97%

Section: Specific Aspects Related To the Bioceramic Coatings Ultrathimentioning

confidence: 99%

See 1 more Smart Citation

Bioceramic Coatings for Metallic Implants

Vlădescu

Surmeneva

Cotruț

et al. 2016

Handbook of Bioceramics and Biocomposites

Self Cite

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“…For example, in the recent study by M.A. Surmeneva et al [ 33 ] the ultrathin as-deposited CaP coating significantly enhanced the degradation resistance of Mg–1 wt.% Ca alloy. It is well-known that the degradation rate of CaP not only dependent on Ca/P ratio but on a material crystallinity state.…”

Section: Introductionmentioning

confidence: 99%

Tailoring the Surface Morphology and the Crystallinity State of Cu- and Zn-Substituted Hydroxyapatites on Ti and Mg-Based Alloys

et al. 2020

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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.

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“…With excellent mechanical properties and biocompatibility in human body environment, magnesium alloy has been increasingly used as the biodegradable orthopedic implant material [1]. Compared with traditional bone implant material such as stainless steel [2][3][4], tantalum alloy [5] and titanium alloy [6][7], secondary surgery removal is not needed for magnesium alloy, and this can effectively reduce the stress shielding effect [8].…”

Section: Introductionmentioning

confidence: 99%