Tuning C–C sp2/sp3 ratio of DLC films in FCVA system for biomedical application

Rao, Xi; Yang, Jihan; Chen, Zilin; Yuan, Yidie; Chen, Qiubing; Feng, Xue; Qin, Lizhao; Zhang, Yongping

doi:10.1016/j.bioactmat.2020.02.009

Cited by 47 publications

(17 citation statements)

References 42 publications

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“…Diamond-like carbon (DLC) coatings are widely used in aerospace [1], automotive [2], defence [3], food and beverage [4], electronics [5], mechanical [6], biomedical [7], surface cosmetics [8] and digital [9] industries. Their recognition in this broad range of industries is due to their superior and multifunctional features.…”

Section: Significance Of Diamond-like Carbon Coatingsmentioning

confidence: 99%

Deposition of diamond-like carbon coatings: Conventional to non-conventional approaches for emerging markets

Zia

Birkett

2021

Ceramics International

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Section: Significance Of Diamond-like Carbon Coatingsmentioning

confidence: 99%

Deposition of diamond-like carbon coatings: Conventional to non-conventional approaches for emerging markets

Zia

Birkett

2021

Ceramics International

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“…The XPS analysis showed the linear increase of the nitrogen incorporation in the a-C:H(N) film with the increase of the amount of the N 2 gas in the treatment, which caused, in general, a decrease in the amount of C-C sp 3 bonding, increasing the adhesion of the film in the substrate and not necessarily the low wear resistance of the formed film.According to Robertson [4] the DLC film that presents hydrogen concentrations between 30 and 50% receives the nomenclature of hydrogenated amorphous carbon (a-C:H), and presents lower hardness and internal stress than ta-C, facilitating the adhesion process of the film in the metallic substrates. This occurs due to sp 2 bonds formed in detriment of sp 3 bonds.The DLC films have been used in a variety of applications due to their notable properties, as protective coatings against wear and corrosion, in optical windows (optical filters), data storage hard drives, high performance automotive parts, coatings for biomedical products and electromechanical microdevices [9][10][11][12].However, as reported by Chen et al [13] and confirmed by Cemin et al [11], the high intrinsic compressive stress of the film, the high variation of the elastic coefficient, the difference in thermal expansion and the low chemical affinity between DLC and substrate difficult the adhesion process of the DLC film mainly when deposited on metallic surfaces. Thus, the use of techniques as oxide layer removal and the use of film interlayer previously to the DLC film deposition can improve this adhesion feature.…”

mentioning

confidence: 99%

“…The DLC films have been used in a variety of applications due to their notable properties, as protective coatings against wear and corrosion, in optical windows (optical filters), data storage hard drives, high performance automotive parts, coatings for biomedical products and electromechanical microdevices [9][10][11][12].…”

mentioning

confidence: 99%

Effect of nitrogen in the properties of diamond-like carbon (DLC) coating on Ti₆Al₄V substrate

Almeida

Souza

Costa

et al. 2020

Mater. Res. Express

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The great interest in the study of diamond-like carbon films (a-C:H) is justified by its mechanical and tribological properties. However, the high internal stress of the film results in its difficult adhesion to the metallic substrate, which can be solved by nitrogen incorporation in the a-C:H film, allowing a formed film of lower internal stress. The objective of this work is to evaluate the influence of flow (20, 30 and 40sccm), CH 4 /Ar ratio (90/10 and 70/30) and voltage (400, 500, 600 and 700 V) in the a-C:H formation. For the best condition of the film, we studied the effect of nitrogen incorporation in the hardness and wear resistance of the a-C:H(N), modifying the nitrogen percentage in the treatment at 10% to 60% N 2 . The treatments were carried out in the Ti 6 Al 4 V substrate by DC-PECVD for two hours. For good adhesion of the films on the substrate, a silicon interlayer must be produced. The increase in the voltage above 600 V increases the I D /I G and film thickness, causing its delamination, and the gas ratio did not influence the a-C:H characteristics. The a-C:H film deposited with 30 sccm, 90/10 and 500 V was characterized as a-C:H (hard), with properties such as the hardness of 17 GPa, 30% H, 39% sp 3 and I D /I G ratio of 0.58. Since nitrogen reduced the deposition rate, the total gas flow for the production of a-C:H(N) was performed with 40 sccm. The Raman spectra of a-C:H(N) films showed changes in D band intensity and displacement in relation to the nitrogen-free film spectrum, evidencing the incorporation of nitrogen in the film. The XPS analysis showed the linear increase of the nitrogen incorporation in the a-C:H(N) film with the increase of the amount of the N 2 gas in the treatment, which caused, in general, a decrease in the amount of C-C sp 3 bonding, increasing the adhesion of the film in the substrate and not necessarily the low wear resistance of the formed film.According to Robertson [4] the DLC film that presents hydrogen concentrations between 30 and 50% receives the nomenclature of hydrogenated amorphous carbon (a-C:H), and presents lower hardness and internal stress than ta-C, facilitating the adhesion process of the film in the metallic substrates. This occurs due to sp 2 bonds formed in detriment of sp 3 bonds.The DLC films have been used in a variety of applications due to their notable properties, as protective coatings against wear and corrosion, in optical windows (optical filters), data storage hard drives, high performance automotive parts, coatings for biomedical products and electromechanical microdevices [9][10][11][12].However, as reported by Chen et al [13] and confirmed by Cemin et al [11], the high intrinsic compressive stress of the film, the high variation of the elastic coefficient, the difference in thermal expansion and the low chemical affinity between DLC and substrate difficult the adhesion process of the DLC film mainly when deposited on metallic surfaces. Thus, the use of techniques as oxide layer removal and the use of film interlayer previously to ...

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“…The influence of nitrogen impurities on the structure and properties of DLC and ta-C coatings can be expected during annealing in ambient air and in sliding tests at high temperatures. The increase in the sp 2 bond content, release of the stress, and improvement in the adhesion to Si and CoCrMo alloys were revealed for nitrogen-doped DLC coatings [40,41].…”

Section: Introductionmentioning

confidence: 92%

High-Temperature Tribological Performance of Al2O3/a-C:H:Si Coating in Ambient Air

et al. 2021

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The study investigates thermal stability and high temperature tribological performance of a-C:H:Si diamond-like carbon (DLC) coating. A thin alumina layer was deposited on top of the a-C:H:Si coating to improve the tribological performance at high temperatures. The a-C:H:Si coating and alumina layer were prepared using plasma-activated chemical vapour deposition and atomic layer deposition, respectively. Raman and X-ray photoelectron spectroscopy were used to investigate the structures and chemical compositions of the specimens. The D and G Raman peaks due to sp2 bonding and the peaks corresponding to the trans-polyacetylene (t-Pa) and sp bonded chains were identified in the Raman spectra of the a-C:H:Si coating. Ball-on-disc sliding tests were carried out at room temperature and 400 °C using Si3N4 balls as counter bodies. The a-C:H:Si coating failed catastrophically in sliding tests at 400 °C; however, a repeatable and reproducible regime of sliding with a low coefficient of friction was observed for the Al2O3/a-C:H:Si coating at the same temperature. The presence of the alumina layer and high stress and temperature caused structural changes in the bulk a-C:H:Si and top layers located near the contact area, leading to the modification of the contact conditions, delivering of extra oxygen into the contact area, reduction of hydrogen effusion, and suppression of the atmospheric oxidation.

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Tuning C–C sp2/sp3 ratio of DLC films in FCVA system for biomedical application

Cited by 47 publications

References 42 publications

Deposition of diamond-like carbon coatings: Conventional to non-conventional approaches for emerging markets

Deposition of diamond-like carbon coatings: Conventional to non-conventional approaches for emerging markets

Effect of nitrogen in the properties of diamond-like carbon (DLC) coating on Ti₆Al₄V substrate

High-Temperature Tribological Performance of Al2O3/a-C:H:Si Coating in Ambient Air

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Tuning C–C sp2/sp3 ratio of DLC films in FCVA system for biomedical application

Cited by 47 publications

References 42 publications

Deposition of diamond-like carbon coatings: Conventional to non-conventional approaches for emerging markets

Deposition of diamond-like carbon coatings: Conventional to non-conventional approaches for emerging markets

Effect of nitrogen in the properties of diamond-like carbon (DLC) coating on Ti6Al4V substrate

High-Temperature Tribological Performance of Al2O3/a-C:H:Si Coating in Ambient Air

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Effect of nitrogen in the properties of diamond-like carbon (DLC) coating on Ti₆Al₄V substrate