Thin Films Deposition of Ta2O5 and ZnO by E-Gun Technology on Co-Cr Alloy Manufactured by Direct Metal Laser Sintering

Băilă, Diana-Irinel; Vițelaru, Cătălin; Trușcă, Roxana; Constantin, Lidia R.; Păcurar, Ancuţa; Parau, Anca Constantina; Păcurar, Răzvan

doi:10.3390/ma14133666

Cited by 5 publications

(6 citation statements)

References 29 publications

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“…1314-61-0, from Sigma-Aldrich (St. Louis, MO, USA) were used as raw materials. The coating deposition is similar to references [18,33]. The e-gun process was realized in a physical vapor deposition chamber; in high vacuum at pressure of 10 −5 to 10 −6 torr.…”

Section: Methodsmentioning

confidence: 99%

“…Ta 2 O 5 film has prospective applications in devices such as optical filters, optical waveguides, non-linear optical devices and photonic crystals [32]. Ta 2 O 5 thin films were obtained by pulsed laser ablation, magnetron sputtering, atomic layer deposition, ion beam sputtering and heat evaporation [32,33]. The synthesis of the Ta 2 O 5 coatings with better properties requires the characterization of the coatings related to the preparation method.…”

Section: Introductionmentioning

confidence: 99%

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Hydrophobic and Transparent Tantalum Pentoxide-Based Coatings for Photovoltaic (PV) Solar Panels

Mocioiu,

Atkinson,

Aricov

et al. 2024

Coatings

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Photovoltaic (PV) solar panels suffer from efficiency losses due to the accumulation of dust on their surface during operation, as well as the loss of transparency in the top glass. The efficiency can be increased when hydrophobic films are deposited on the top glass of the solar cells. The top glass of solar cells must have three characteristics: high transmittance in the 380–750 nm range, a band gap greater than 3.2 eV and a refractive index higher than 1.23. So, the films require the same characteristics. This work presents an increase in the contact angle (related to an increase in the hydrophobic character) when Ta2O5 is partially substituted with ZnO. The studied films, physically deposited on glass by e-gun technology, present a non-crystalline state in the form of the X-ray patterns shown. The films have a transmission of 75%–80% in the visible range. The morphology and roughness of the coatings were evaluated by atomic force microscopy. All films show the values of the Millipore water contact angle higher than 91 degrees, leading to the acquisition of hydrophobic properties on the surface. In comparison, the substrate is hydrophilic, with an average contact angle of 53.81 ± 2.16. The hydrophobic properties and self-cleaning ability make the films recommendable for application. The band gap of the coatings was calculated with the Tauc method, and they have values of 4.5–4.6 eV.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hydrophobic and Transparent Tantalum Pentoxide-Based Coatings for Photovoltaic (PV) Solar Panels

Mocioiu,

Atkinson,

Aricov

et al. 2024

Coatings

Self Cite

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“…It is important to mention that the trend to eliminate the use of CoCr and NiCr, due to toxicological risks evidenced in the EU regulations, has a relatively slow rate, and nowadays, more evaluations of their ion release are taking place [67]. Simultaneously with alternative strategies to reduce the risk of heavy metals for dental health, improving the quality of the CoCr alloys by changing their surface composition using coatings [68], new advanced technologies in obtaining CoCr for alloys have been tested [69,70].…”

Section: Trends In Enhancing Coatings Performances On Cocr Alloys and Other Metallic Alloys (Including High-entropy Alloys)mentioning

confidence: 99%

“…Innovative strategies with both new advanced technologies and new coatings in obtaining new CoCr alloys have been introduced [6,70]. Regarding new compositions or alloys with new structures and properties, the trend is to involve more elements that are capable of inducing more functionality, even with the addition of small quantities.…”

Section: Trends In Enhancing Coatings Performances On Cocr Alloys and Other Metallic Alloys (Including High-entropy Alloys)mentioning

confidence: 99%

Sustainable Coatings on Metallic Alloys as a Nowadays Challenge

2021

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Starting with a description of the meaning of sustainable coating nowadays, this review presents a selection of methods for sustainable coatings manufacture using raw materials, saving energy and costs. This selection creates an introduction for the coatings performances of intensively investigated coated alloys and their multifunctionality. There are many examples and EU recommendations to be discussed, and we especially chose to introduce sustainable coatings with both industrial and medical functions, such as bioinspired films and coatings on high-entropy alloys, biodegradable metallic alloys, etc. A special focus is on nanotechnology and nanomaterials in green procedures, enhancing coatings’ multifunctionality, introducing green corrosion inhibitors, smart additives, and coatings based on superhydrophobicity. The conclusions and future perspectives of sustainable and multifunctional coatings, as expressions of sustainable advanced materials, are based on important motivations of such studies.

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“…The size of the metal powder particles is between 20 and 40 µm. The size of the particles, the surfaces of the products, as well as their geometric configuration influence the final printing resolution [23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Reconditioning by Welding of Prosthesis Obtained through Additive Manufacturing

Ronțescu

Amza

Bogatu

et al. 2022

Metals

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Biocompatible titanium alloys are increasingly being used to make custom medical implants using additive manufacturing processes. This paper considered the welding reconditioning of a titanium-alloy customized additive manufactured hip implant with several manufacturing defects. The personalized implants are made starting from a Computer-Aided Design (CAD) model as a direct result from the medical imaging investigations of the areas of interest. Then the customized implant is fabricated using an additive manufacturing process (in this case Powder Bed Fusion—Direct Metal Laser Sintering—DMLS). The analysis of the chemical composition values as well as the values of the mechanical properties of the samples obtained via DMLS additive manufacturing process, revealed that such a manufacturing process can be successfully used to make customized surgical implants. The mechanical properties values of the DMLS samples are approximately equal to those specified by the manufacturer of the titanium powder used for sintering. On average, the tensile strength was found to be 24.75% higher, while yield strength 22.7% higher than the values provided in the standard for surgical implants applications. In case the additive manufacturing process produces products with defects one might want to try and recover the implant due to costs and time constraints. The Tungsten Inert Gas (TIG) welding reconditioning process with ERTi-5 Ti64 rod for welding titanium alloys with a content of 6% aluminum and 4% vanadium filler material was used to restore the geometric characteristics as well as the functional properties of a custom hip medical prosthesis. After welding depositing successive layers of materials, the surfaces of the prosthesis were machined to restore the functional properties according to the characteristics of the original 3D model. A 3D scan was used to compare the geometrical characteristics between the original part and reconditioned one. Deviations were less than 1 mm and were acceptable from the medical point of view.

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Thin Films Deposition of Ta2O5 and ZnO by E-Gun Technology on Co-Cr Alloy Manufactured by Direct Metal Laser Sintering

Cited by 5 publications

References 29 publications

Hydrophobic and Transparent Tantalum Pentoxide-Based Coatings for Photovoltaic (PV) Solar Panels

Hydrophobic and Transparent Tantalum Pentoxide-Based Coatings for Photovoltaic (PV) Solar Panels

Sustainable Coatings on Metallic Alloys as a Nowadays Challenge

Reconditioning by Welding of Prosthesis Obtained through Additive Manufacturing

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