Microplasma synthesis of biocompatible coatings with additions of magnesium, silicon and silver on pure titanium from homogeneous electrolytes

Terleeva, O. P.; Slonova, A. I.; Миронов, И. В.; Rogov, Aleksey B.; Sharkeev, Yu. P.

doi:10.1016/j.surfcoat.2016.05.045

Cited by 14 publications

(5 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Many PEO treatments of Ti-based alloys are targeted at biomedical applications, where the coating prefers porosity so that cells have sufficient room to duplicate or bifurcate through tissue engineering [98][99][100][101]. In particular, calcium phosphate coatings on titanium implants have been extensively studied and their compositions are carefully tuned for biocompatibility [102][103][104][105][106][107].…”

Section: Soft Sparking On Ti-based Alloysmentioning

confidence: 99%

Review of the Soft Sparking Issues in Plasma Electrolytic Oxidation

Tsai

Chou

2018

Metals

View full text Add to dashboard Cite

Abstract:A dense inner layer is highly valued among the surface coatings created through plasma electrolytic oxidation (PEO) treatment, because the PEO coating has been troubled by inherent porosity since its conception. To produce the favored structure, a proven technique is to prompt a soft sparking transition, which involves a sudden decrease in light and acoustic emissions, and a drop in anodic voltage under controlled current mode. Typically these phenomena occur in an electrolyte of sodium silicate and potassium hydroxide, when an Al-based sample is oxidized with an AC or DC (alternating or direct current) pulse current preset with the cathodic current exceeding the anodic counterpart. The dense inner layer feature is pronounced if a sufficient amount of oxide has been amassed on the surface before the transition begins. Tremendous efforts have been devoted to understand soft sparking at the metal-oxide-electrolyte interface. Studies on aluminum alloys reveal that the dense inner layer requires plasma softening to avoid discharge damages while maintaining a sufficient growth rate, a porous top layer to retain heat for sintering the amassed oxide, and proper timing to initiate the transition and end the surface processing after transition. Despite our understanding, efforts to replicate this structural feature in Mg-and Ti-based alloys have not been very successful. The soft sparking phenomena can be reproduced, but the acquired structures are inferior to those on aluminum alloys. An analogous quality of the dense inner layer is only achieved on Mg-and Ti-based alloys with aluminate anion in the electrolytic solution and a suitable cathodic current. These facts point out that the current soft sparking knowledge on Mg-and Ti-based alloys is insufficient. The superior inner layer on the two alloys still relies on rectification and densification of aluminum oxide.

show abstract

Section: Soft Sparking On Ti-based Alloysmentioning

confidence: 99%

Review of the Soft Sparking Issues in Plasma Electrolytic Oxidation

Tsai

Chou

2018

Metals

View full text Add to dashboard Cite

show abstract

“…8(b), (c)) welcoming the osteoblast adhesion in the human body. 112,113) As it was shown recently, nano Ti coated with the PEO technique has finer structure, contains more biocompatible compounds and shows higher cell adhesion compared to the coating on CG Ti. 98) For the orthopedic applications, the PEO coating opens possibilities to develop an "ideal coating".…”

Section: Surface Modification Of Nanometals For Implant Applicationsmentioning

confidence: 95%

“…EDTA, transfers the electrolytes into colloids with higher stability. 113,128) An important aspect of the PEO coating bioactivity increase is the development of higher hydroxyapatite (HAp) content. Usually, Ca-, P-containing phases in the PEO coating have a various crystalline structure, and also a significant amount of amorphous phase is present.…”

Section: Surface Modification Of Nanometals For Implant Applicationsmentioning

confidence: 99%

Developing Nanostructured Metals for Manufacturing of Medical Implants with Improved Design and Biofunctionality

2019

View full text Add to dashboard Cite

Recent years have witnessed a series of numerous investigative activities to improve existing metallic biomaterials (Ti and Ti alloys, stainless steels, Mg and Fe alloys) by their nanostructuring for advanced medical applications using severe plastic deformation (SPD) processing. Nanostructured metals are peculiar for their enhanced strength and fatigue life, which makes them an excellent choice for fabrication of implants with improved design for dentistry and orthopedics. Moreover, surface modification of nanometals by chemical etching and bioactive coatings show a significant improvement of biomedical properties. Various studies conducted in this field make it possible to fabricate miniaturized dental implants and nanoTi plates with enhanced osseointegration.

show abstract

“…The chemical composition of the MAO coatings depends on the electrolyte constituents and processing conditions [ 4 , 7 , 8 , 9 , 10 , 11 ]. It has been shown that Ti implants with MAO coatings containing a phosphorus (P) element can improve cell adhesion and proliferation [ 11 ], and P-containing electrolytes such as H 3 PO 4 [ 8 , 10 , 11 ], NaH 2 PO 4 [ 3 , 12 ], Na 3 PO 4 [ 9 ], sodium hexametaphosphate [ 13 , 14 ], calcium glycerophosphate [ 15 ], β-glycerophosphate disodium [ 16 ] and phytic acid (C 6 H 6 (PO 4 ) 6 H 12 , abbreviated as H 12 Phy or InsP6) [ 17 ] have been used in MAO treatment. H 12 Phy, also known as inositol hexakisphosphate, is a natural and nontoxic organic macromolecule, and its structure is shown in Figure 1 a [ 18 ].…”

Section: Introductionmentioning

confidence: 99%

Novel Mg-Incorporated Micro-Arc Oxidation Coatings for Orthopedic Implants Application

et al. 2021

View full text Add to dashboard Cite

In this study, Ti-6Al-4V alloy samples were processed by micro-arc oxidation (MAO) in phytic acid (H12Phy) electrolytes with the addition of different concentrations of EDTA-MgNa2 (Na2MgY) and potassium hydroxide (KOH). The surface characterization and cytocompatibility of MAO-treated samples were evaluated systematically. H12Phy is a necessary agent for MAO coating formation, and the addition of Na2MgY and KOH into the electrolytes increases the surface roughness, micropore size and Mg contents in the coatings. The MAO coatings are primarily composed of anatase, rutile, MgO and Mg3(PO4)2. Magnesium (Mg) ions in the electrolytes enter into MAO coatings by diffusion and electromigration. The MAO coatings containing 2.97 at% Mg show excellent cell viability, adhesion, proliferation, alkaline phosphatase activity, extracellular matrix (ECM) mineralization and collagen secretion, but the cytocompatibility of the MAO coatings containing 6.82 at% Mg was the worst due to the excessively high Mg content. Our results revealed that MAO coatings with proper Mg contents improve the cytocompatibility of the Ti-6Al-4V alloys and have large potential in orthopedic applications.

show abstract

Microplasma synthesis of biocompatible coatings with additions of magnesium, silicon and silver on pure titanium from homogeneous electrolytes

Cited by 14 publications

References 34 publications

Review of the Soft Sparking Issues in Plasma Electrolytic Oxidation

Review of the Soft Sparking Issues in Plasma Electrolytic Oxidation

Developing Nanostructured Metals for Manufacturing of Medical Implants with Improved Design and Biofunctionality

Novel Mg-Incorporated Micro-Arc Oxidation Coatings for Orthopedic Implants Application

Contact Info

Product

Resources

About