Modificação da superfície e das propriedades tribológicas do titânio por carbonitretação a plasma

Rocha, R. C. S.; Braz, Danilo Cavalcanti; Barbosa, José; Filho, A. Nunes; Jacobsen, Stefan; Vasconcelos, Matheus; Alves, Clodomiro

doi:10.1590/s1517-70762011000300004

Cited by 2 publications

(2 citation statements)

References 13 publications

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“…A chromel‐alumel thermocouple was placed in contact with the bottom of the sample holder to monitor temperature. The gas flow rate was controlled by digital flow meters (MKS model 247), as detailed in previous work .…”

Section: Methodsmentioning

confidence: 99%

Titanium Surface Chemical Composition Interferes in the Pseudomonas aeruginosa Biofilm Formation

et al. 2018

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Bacterial adhesion on three different surfaces: untreated Ti, plasma nitriding, and plasma carbonitriding Ti substrates were investigated. The samples were placed in bacterial cultures of Pseudomonas aeruginosa to assess biofilm formation. The correlation between the amount of bacteria attached to the surface after a lapse of time with nanotopography and physicochemical properties was performed. TiN showed the highest capacity to avoid bacterial adhesion, while presenting intermediate roughness and wettability. Although the surface of TiCN had the highest surface roughness and low contact angle (high wettability), bacterial adhesion was intermediate on this sample. Untreated Ti, even though presenting a smooth surface and low wettability, had the highest tendency to form biofilms.

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Section: Methodsmentioning

confidence: 99%

Titanium Surface Chemical Composition Interferes in the Pseudomonas aeruginosa Biofilm Formation

et al. 2018

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“…As an alternative technique, there is the plasma cleaning technology, which has been the object of study of several works [2][3][4][5][6][7] and shown to be an efficient technique in degradation of compounds with different organic functions. Plasma cleaning technologies are already being used in the cleaning of inputs in the semiconductor sectors [8], food industry [9], medical [10,11], sputtering printed circuit boards [12], surface modification [13][14][15][16] and nitriding [17,18]. However, due to the complexity of the plasma environment, it is necessary to obtain more information about the influence of the different species on the degradation of organic functions [19].…”

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confidence: 99%

Influence of applied plasma power on degradation of L-proline in an inductively coupled RF plasma reactor

et al. 2022

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Surface treatments such as heat treatments, paints, plasma treatments and galvanizing are important in metal working industry. In those treatments, the required adhesion characteristics can be limited if contaminants are present, so there is a need to clean these surfaces. Conventional processes can be costly, some generated waste may be environmentally hazardous and, in some cases, due to part geometry, they are not effective. Alternatively, plasma treatments which are considered to be environmentally clean, more efficient and with lower operating costs can overcome those difficulties. Due to the reactional complexity of these treatments, there are many fields to be researched, such as which reactions are due to impacts of (neutral) chemical species and which are due to excited species and radiation. The present work aims to verify the interactions between Ar-10%O 2 plasma using amino acid L-proline in an inductively coupled radiofrequency plasma. This study showed that oxidative plasma promotes high degradation of the sample. A gas analyzer (quadrupole mass spectrometer) coupled to the gas outlet was used and many gaseous products are detected during treatment, such: H 2 , H 2 O, CO, NO (Nitric Oxide) and CO 2 while L-proline undergoes intense degradation. The conclusions allow to state that the interaction between the Ar/O 2 plasma and L-proline promotes intense degradation through the breakdown of the heterocyclic ring of the molecule.

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Modificação da superfície e das propriedades tribológicas do titânio por carbonitretação a plasma

Cited by 2 publications

References 13 publications

Titanium Surface Chemical Composition Interferes in the Pseudomonas aeruginosa Biofilm Formation

Titanium Surface Chemical Composition Interferes in the Pseudomonas aeruginosa Biofilm Formation

Influence of applied plasma power on degradation of L-proline in an inductively coupled RF plasma reactor

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