Corrosion behavior of magnetron sputtered α-Ta coatings on smooth and rough steel substrates

Maeng, S.; Axe, Lisa; Tyson, Trevor; Gładczuk, L.; Sosnowski, Marek

doi:10.1016/j.surfcoat.2005.08.128

Cited by 13 publications

(5 citation statements)

References 15 publications

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“…Esta equação foi empregada por diversos autores para avaliar a porosidade de revestimentos PVD (Maeng et al 2006, Lins et al 2006, Vacandio et al 2000.…”

Section: Porosidadeunclassified

"Caracterização do comportamento frente à corrosão de um aço inoxidável austenítico para aplicações biomédicas com revestimentos PVD de TiN, TiCN e DLC"

Antunes¹

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por sua orientação, seu apoio e sua confiança sempre presentes. Ao amigo Dr. Ronaldo Ruas da Brasimet S. A., por sua ajuda imprescindível e constante na aplicação dos revestimentos de TiN, TiCN e DLC em todas as amostras ao longo do trabalho. Sem ele, este trabalho não teria sido possível. À minha esposa Msc. Mara Cristina Lopes de Oliveira por sua ajuda e seu companheirismo que sempre nos mantiveram unidos ao longo deste trabalho. Ao amigo e técnico do Laboratório de Corrosão do IPEN Olandir Vercino Correa por sua ajuda fundamental. À Dra. Olga Zazuco Higa do IPEN por sua ajuda e orientação nos testes de citotoxicidade e genotoxicidade. Ao amigo Dr. Sérgio Luiz de Assis pelas valiosas discussões.

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“…Esta equação foi empregada por diversos autores para avaliar a porosidade de revestimentos PVD (Maeng et al 2006, Lins et al 2006, Vacandio et al 2000.…”

Section: Porosidadeunclassified

"Caracterização do comportamento frente à corrosão de um aço inoxidável austenítico para aplicações biomédicas com revestimentos PVD de TiN, TiCN e DLC"

Antunes¹

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“…Consequently, it is important to note that only few studies report the corrosion performance of Ta-based materials and are out of the scope of dental implant application. Mostly, the studies focus on Ta corrosion behavior influenced by crystalline phases [21,22] or surface roughness [23] in acid environments (i.e. H 2 SO 4 ), or on the influence of different Ta deposition methods on the corrosion performance in saline environments (NaCl), testing steel corrosion protection approaches [24].…”

Section: Introductionmentioning

confidence: 99%

“…Still, b-Ta structure is more susceptible to suffer corrosion due to its brittle nature [21,22]. Additionally, it was found that the corrosion protection was maintained even using substrates with different roughness [23]. On the other hands, the electrochemical performance for tantalum oxides has shown to be dependent on the oxide morphology/density, revealing a lower coating breakdown potential and faster pit growth in highly porous Ta 2 O 5 .…”

Section: Introductionmentioning

confidence: 99%

Influence of Oxygen content on the electrochemical behavior of Ta1-xOx coatings

Alves

Calderón

Dias

et al. 2016

Electrochimica Acta

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In this study, Ta 1-x O x coatings were deposited by reactive magnetron sputtering aiming at the enhancement of the electrochemical stability stainless steel 316L. The coatings were produced using variable oxygen content in order to determine its influence on the films morphological features and corrosion resistance. Structural and morphological characteristics were correlated with the corrosion behavior in artificial saliva. Potentiodynamic and electrochemical impedance spectroscopy tests were complemented with X-ray photoelectron spectroscopy to determine the electrochemical behavior of the coatings. The results reveal a more protective behavior of the coatings as the oxygen amount increases in the films, as well as pitting inhibition in the coated stainless steel, independently of the film composition. A synergetic effect between Ta 2 O 5 and phosphate-based passive layers is suggested as the protective mechanisms of the coatings; while the more active electrochemical behavior of low oxygen content films is evidenced as a consequence of the metallic tantalum on the surface with a more open morphology and larger density of defects on the surface.2016 Published by Elsevier Ltd.

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“…Bulk tantalum has excellent physical and chemical properties such as good ductility, high melting point (2996 ∘ C), and relatively low thermal conductivity (57 W/m⋅K at 20 ∘ C) [18]. Ta films deposited by physical vapor deposition have been used to protect large caliber military gun tubes [18][19][20][21][22]. Kang et al produced Ta/TaN multilayer films on a high speed steel substrate by reactive sputtering and achieved a microvickers hardness of 2700 kgf mm −2 [23].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Thermal Stability of TiN/Ta Multilayer Film Deposited by Ion Beam Assisted Deposition

Shang

Shao

2014

Advances in Materials Science and Engineering

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TiN/Ta multilayer film with a modulation period of 5.6 nm and modulation ratio of 1 : 1 was produced by ion beam assisted deposition. Microstructure of the as-deposited TiN/Ta multilayer film was observed by transmission electron microscopy and mechanical properties were investigated. Residual stress in the TiN/Ta multilayer film was about 72% of that of a TiN monolayer film with equivalent thickness deposited under the same conditions. Partial residual stress was released in the Ta sublayers during deposition, which led to the decrease of the residual stress of the TiN/Ta multilayer film. Nanohardness (H) of the TiN/Ta multilayer film was 24 GPa, 14% higher than that of the TiN monolayer film. It is suggested that the increase of the nanohardness is due to the introduction of the Ta layers which restrained the growth of TiN crystal and led to the decrease of the grain size. A significant increase (3.5 times) of theH3/E2(Eelastic modulus) value indicated that the TiN/Ta multilayer film has higher elasticity than the TiN monolayer film. TheLc(critical load in nano-scratch test) value of the TiN monolayer film was 45 mN, which was far lower than that of the TiN/Ta multilayer film (around 75 mN). Results of the indentation test showed a higher fracture toughness of the TiN/Ta multilayer film than that of the TiN monolayer film. Results of differential scanning calorimetric (DSC) and thermo gravimetric analysis (TGA) indicate that the TiN/Ta multilayer film has better thermal stability than the TiN monolayer film.

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Corrosion behavior of magnetron sputtered α-Ta coatings on smooth and rough steel substrates

Cited by 13 publications

References 15 publications

"Caracterização do comportamento frente à corrosão de um aço inoxidável austenítico para aplicações biomédicas com revestimentos PVD de TiN, TiCN e DLC"

"Caracterização do comportamento frente à corrosão de um aço inoxidável austenítico para aplicações biomédicas com revestimentos PVD de TiN, TiCN e DLC"

Influence of Oxygen content on the electrochemical behavior of Ta1-xOx coatings

Mechanical Properties and Thermal Stability of TiN/Ta Multilayer Film Deposited by Ion Beam Assisted Deposition

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