A Review on Adhesion Strength of Peo Coatings by Scratch Test Method

Sharifi, Hossein; Mahmood, Asif; Darband, Ghasem Bratai; Shrestha, Suman

doi:10.1142/s0218625x18300046

Cited by 44 publications

(15 citation statements)

References 101 publications

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“…This coating composition and morphology provides sufficient surface passivation for the implant prolonged operation in the corrosive fluids of a human body [81]. Also, this type of coating exhibits exceptional adhesion to the titanium surface as summarized elsewhere [5].…”

Section: Synthesis Of Bioactive Bifunctional Moleculesmentioning

confidence: 93%

Biocompatible Organic Coatings Based on Bisphosphonic Acid RGD-Derivatives for PEO-Modified Titanium Implants

et al. 2020

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Currently, significant attention is attracted to the problem of the development of the specific architecture and composition of the surface layer in order to control the biocompatibility of implants made of titanium and its alloys. The titanium surface properties can be tuned both by creating an inorganic sublayer with the desired morphology and by organic top coating contributing to bioactivity. In this work, we developed a composite biologically active coatings based on hybrid molecules obtained by chemical cross-linking of amino acid bisphosphonates with a linear tripeptide RGD, in combination with inorganic porous sublayer created on titanium by plasma electrolytic oxidation (PEO). After the addition of organic molecules, the PEO coated surface gets nobler, but corrosion currents increase. In vitro studies on proliferation and viability of fibroblasts, mesenchymal stem cells and osteoblast-like cells showed the significant dependence of the molecule bioactivity on the structure of bisphosphonate anchor and the linker. Several RGD-modified bisphosphonates of β-alanine, γ-aminobutyric and ε-aminocaproic acids with BMPS or SMCC linkers can be recommended as promising candidates for further in vivo research.

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Section: Synthesis Of Bioactive Bifunctional Moleculesmentioning

confidence: 93%

Biocompatible Organic Coatings Based on Bisphosphonic Acid RGD-Derivatives for PEO-Modified Titanium Implants

et al. 2020

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“…The formation of Cr 2 AlC coatings debris acts as a stress riser and causes an increase in the friction coefficient. After reaching the maximum load at the end of scratch, the coating buckling cracks and spallation was observed [ 82 ]. Therefore, the Cr 2 AlC coatings exhibit excellent mechanical integrity and elastic recovery.…”

Section: Resultsmentioning

confidence: 99%

Fabrication and Mechanical Properties of Cr2AlC MAX Phase Coatings on TiBw/Ti6Al4V Composite Prepared by HiPIMS

Qureshi

Tang

et al. 2021

Materials

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The high-power impulse magnetron sputtering (HiPIMS) technique is widely used owing to the high degree of ionization and the ability to synthesize high-quality coatings with a dense structure and smooth morphology. However, limited efforts have been made in the deposition of MAX phase coatings through HiPIMS compared with direct current magnetron sputtering (DCMS), and tailoring of the coatings’ properties by process parameters such as pulse width and frequency is lacking. In this study, the Cr2AlC MAX phase coatings are deposited through HiPIMS on network structured TiBw/Ti6Al4V composite. A comparative study was made to investigate the effect of average power by varying frequency (1.2–1.6 kHz) and pulse width (20–60 μμs) on the deposition rate, microstructure, crystal orientation, and current waveforms of Cr2AlC MAX phase coatings. X-ray diffraction (XRD), scanning electron microscopy (SEM), and atomic force microscopy (AFM) were used to characterize the deposited coatings. The influence of pulse width was more profound than the frequency in increasing the average power of HiPIMS. The XRD results showed that ex situ annealing converted amorphous Cr-Al-C coatings into polycrystalline Cr2AlC MAX phase. It was noticed that the deposition rate, gas temperature, and roughness of Cr2AlC coatings depend on the average power, and the deposition rate increased from 16.5 to 56.3 nm/min. Moreover, the Cr2AlC MAX phase coatings produced by HiPIMS exhibits the improved hardness and modulus of 19.7 GPa and 286 GPa, with excellent fracture toughness and wear resistance because of dense and column-free morphology as the main characteristic.

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“…8(a)). 110,111) This mechanism provides the surface morphology with regulated roughness and porosity ( Fig. 8(b), (c)) welcoming the osteoblast adhesion in the human body.…”

Section: Surface Modification Of Nanometals For Implant Applicationsmentioning

confidence: 99%

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

2019

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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.

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A Review on Adhesion Strength of Peo Coatings by Scratch Test Method

Cited by 44 publications

References 101 publications

Biocompatible Organic Coatings Based on Bisphosphonic Acid RGD-Derivatives for PEO-Modified Titanium Implants

Biocompatible Organic Coatings Based on Bisphosphonic Acid RGD-Derivatives for PEO-Modified Titanium Implants

Fabrication and Mechanical Properties of Cr2AlC MAX Phase Coatings on TiBw/Ti6Al4V Composite Prepared by HiPIMS

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

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