Titanium perovskite (CaTiO3) formation in Ti6Al4V alloy using the electrical discharge machining process for biomedical applications

Sales, Wisley Falco; Oliveira, A.R.F.; Raslan, Alberto Arnaldo

doi:10.1016/j.surfcoat.2016.10.028

Cited by 45 publications

(20 citation statements)

References 11 publications

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“…The presence of Cu in the recast layer is due to ion transfer from the brass wire electrode which has been previously reported by other researchers [24,27,28]. The presence of the oxygen for oxides produced by mWEDM as compared with the original γ-TiAl substrate can be attributed to preferential oxidation of Ti which is thermodynamically favored [35]. Nb and Cr are γ-TiAl alloy elements.…”

Section: Surface Characterizationssupporting

confidence: 63%

Advanced surface treatment techniques counteract biofilm-associated infections on dental implants

Koopaie

Bordbar‐Khiabani

Kolahdooz

et al. 2020

Mater. Res. Express

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Topography and surface chemistry can significantly affect biofilm formation on dental implants. Recently, the γ-TiAl alloy was considered as the most reliable candidates for the preparation of dental implants because of its excellent mechanical strength, chemical stability and biocompatibility. The emphasis of this study lies in the effects of high-speed milling assisted the minimum quantity of lubrication (HSM-MQL), micro-current wire electrical discharge machining (mWEDM), Er,Cr:YSGG laser and sandblasting/largegrit/acid-etching (SLA) treatments on surface morphology, topography, chemical composition, wettability and biofilm-associated infections on the surface of each group. The surface-treated samples were analyzed using a scanning electron microscope (SEM), SEM surface reconstruction, energy dispersive x-ray spectroscopy (EDS) and water contact angle measuring system. SEM and topography images of mWEDM and laser-treated surfaces showed more irregular surfaces compared to SLA and HSM-MQL surfaces. Results showed that mWEDM and laser-treated surfaces revealed hydrophobic behavior. A significant decrease of biofilm formation was observed on mWEDM treated surface due to the hydrophobicity and existence of the copper element in the recast layer chemical composition. Moreover, EDS confirmed that the zirconium, silicon, and fluorine elements were decorated onto the SLA treated γ-TiAl surface that can have a direct effect on the anti-bacterial activity.

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Section: Surface Characterizationssupporting

confidence: 63%

Advanced surface treatment techniques counteract biofilm-associated infections on dental implants

Koopaie

Bordbar‐Khiabani

Kolahdooz

et al. 2020

Mater. Res. Express

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“…A work presented by Peng et al [19] shows a generation of nanoporous biocompatible layer on the EDMed Ti surface. Sales et al [136] and Shabgard and Khosrozadeh [137] modify the surface of Ti-6Al-4V by adding calcium and carbon nanotubes in the dielectric fluids, respectively. The surface of the biodegradable magnesium alloy was improved when PM-EDM uses zinc powder [17].…”

Section: Evolution Of Edm Applicationsmentioning

confidence: 99%

“…The last approach is to employ both powder and the tool electrode. A nanoporous and calcium-rich oxide layer is produced on Ti-6Al-4V surface when 0.1 Mol/L of calcium chloride aqueous solution was added to deionized water during sinking EDM [136]. This oxide surface was proved to have high hardness and reasonable biocompatibility, enough for biomedical applications, especially for bone and teeth.…”

Section: Biocompatible and Bioactive Oxide Layer Formationmentioning

confidence: 99%

A Review of Additive Mixed-Electric Discharge Machining: Current Status and Future Perspectives for Surface Modification of Biomedical Implants

Aliyu

Rani

Ginta

et al. 2017

Advances in Materials Science and Engineering

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Surface treatment remained a key solution to numerous problems of synthetic hard tissues. The basic methods of implant surface modification include various physical and chemical deposition techniques. However, most of these techniques have several drawbacks such as excessive cost and surface cracks and require very high sintering temperature. Additive mixed-electric discharge machining (AM-EDM) is an emerging technology which simultaneously acts as a machining and surface modification technique. Aside from the mere molds, dies, and tool fabrication, AM-EDM is materializing to finishing of automobiles and aerospace, nuclear, and biomedical components, through the concept of material migrations. The mechanism of material transfer by AM-EDM resembles electrophoretic deposition, whereby the additives in the AM-EDM dielectric fluids are melted and migrate to the machined surface, forming a mirror-like finishing characterized by extremely hard, nanostructured, and nanoporous layers. These layers promote the bone in-growth and strengthen the cell adhesion. Implant shaping and surface treatment through AM-EDM are becoming a key research focus in recent years. This paper reports and summarizes the current advancement of AM-EDM as a potential tool for orthopedic and dental implant fabrication. Towards the end of this paper, the current challenges and future research trends are highlighted.

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“…The use of calcium chloride aqueous solution, during machining of titanium alloy with graphite electrode, produced calcium enriched uneven surface, in the form of titanium perovskite, which was credited to the incidence of re-solidification as well as ion embedding. A porous layer was noted on lateral section underneath a sample where an even hardened layer was generated up to a depth of around 200 μm from the surface (Sales et al, 2016).…”

Section: Surface Integritymentioning

confidence: 99%

Methods and variables in Electrical discharge machining of titanium alloy – A review

Pramanik

Basak

Littlefair

et al. 2020

Heliyon

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Titanium perovskite (CaTiO3) formation in Ti6Al4V alloy using the electrical discharge machining process for biomedical applications

Cited by 45 publications

References 11 publications

Advanced surface treatment techniques counteract biofilm-associated infections on dental implants

Advanced surface treatment techniques counteract biofilm-associated infections on dental implants

A Review of Additive Mixed-Electric Discharge Machining: Current Status and Future Perspectives for Surface Modification of Biomedical Implants

Methods and variables in Electrical discharge machining of titanium alloy – A review

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