Nanocrystalline diamond/amorphous carbon composite films for applications in tribology, optics and biomedicine

Popov, C.; Kulisch, W.; Jelínek, M.; Bock, A.; Strnad, Jakub

doi:10.1016/j.tsf.2005.07.163

Cited by 55 publications

(35 citation statements)

References 21 publications

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“…However, the presence of nanocrystalline diamond in such a graphite structure dominating matrix was amazing, though diamond naocrystallites have been observed in carbon film in some other studies. It was demonstrated that polycrystalline diamond films could be synthesized by CVD techniques, which was governed by pre-existing nucleation induced by bias pretreatment, scratching technique, and preseeding [37][38][39]. Wang et al [40] proposed that the growth mechanisms of nanocrystalline diamond embedded in hydrogenated fullerenelike carbon films could be considered as a nanographite (fullerenelike carbon)-nanodiamond phase transformation promoted by densification of the fullerenelike carbon in the presence of hydrogen.…”

Section: Discussionmentioning

confidence: 99%

Nanocomposite Microstructure and Environment Self-Adapted Tribological Properties of Highly Hard Graphite-Like Film

Wang

et al. 2010

Tribol Lett

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Graphite-like carbon (GLC) nanocomposite films were fabricated by DC magnetron sputtering using high pure graphite target at ambient temperature. Raman spectroscopy and X-ray photoelectron spectroscopy (XPS) investigation showed that the as-deposited GLC films have high concentration of sp 2 -hybridized carbon. High-resolution transmission electron microscopy (HRTEM) images and selected area diffraction patterns (SADP) indicated a complex nanocomposite microstructure of the GLC films. As well as nanocrystalline graphite, a face-center cubic (fcc) diamond with a grain size in the range of 3-8 nm were dispersed in the amorphous carbon matrix inhomogenously and integrally. The nanocomposite GLC film had high hardness of 23 GPa, which was attributed to the mutual strengthening effect of nanoparticles and amorphous matrix. More importantly, the as-deposited nanocomposite GLC film exhibited excellent self-adapted tribological properties in different environments of ambient air, different relative humidity and water. The friction coefficients were 0.053 in ambient air and 0.046 in distilled water, while specific wear rates were 4.5 9 10 -16 m 3 N -1 m -1 and 1.6 9 10 -16 m 3 N -1 m -1 , respectively. The friction regimes and mechanisms in different environments were elaborated. This film is foreseen to high potential in protecting and solid lubricating material in humidity or water environment.

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Section: Discussionmentioning

confidence: 99%

Nanocomposite Microstructure and Environment Self-Adapted Tribological Properties of Highly Hard Graphite-Like Film

Wang

et al. 2010

Tribol Lett

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“…Diamond films were also combined in multilayer coatings with other structures, such as nanocubic boron nitride [18], amorphous ¼ carbon [19] or tetrahedral amorphous carbon (ta-C) [20]. In all cases, the composite structure shows improved properties, when compared to the individual coatings.…”

Section: Introductionmentioning

confidence: 99%

Self-mated tribological systems based on multilayer micro/nanocrystalline CVD diamond coatings

Salgueiredo¹,

Abreu²,

Amaral³

et al. 2013

Wear

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The tribological response of multilayer micro/nanocrystalline diamond coatings grown by the hot filament CVD technique is investigated. These multigrade systems were tailored to comprise a starting microcrystalline diamond (MCD) layer with high adhesion to a silicon nitride (Si3N4) ceramic substrate, and a top nanocrystalline diamond (NCD) layer with reduced surface roughness. Tribological tests were carried out with a reciprocating sliding configuration without lubrication. Such composite coatings exhibit a superior critical load before delamination (130 -200 N), when compared to the mono-(60-100 N) and bilayer coatings (110 N), considering ∼10 mm thick films. Regarding the friction behaviour, a short-lived initial high friction coefficient was followed by low friction regimes (friction coefficients between 0.02 and 0.09) as a result of the polished surfaces tailored by the tribological solicitation. Very mild to mild wear regimes (wear coefficient values between 4.1 10 −8 and 7.7 10 −7 mm 3 N −1 m −1 ) governed the wear performance of the self-mated multilayer coatings when subjected to highload short-term tests (60-200 N; 2 h; 86 m) and medium-load endurance tests (60 N; 16 h; 691 m).

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“…The few reported publications on the biological behavior of NCD coatings are very specific regarding the cell type/ application [3,[24][25][26]; in the present work, two fibroblast cell culture systems were used to address the cytotoxicity of NCD-coated Si 3 N 4 samples: L929 cells (a mouse permanent cell line) and human gingival fibroblasts. Cell behavior was evaluated in terms of cell adhesion on the NCD films, cell viability/proliferation (mitochondrial function, MTT assay) and pattern of cell growth.…”

Section: Introductionmentioning

confidence: 99%

Cytotoxicity evaluation of nanocrystalline diamond coatings by fibroblast cell cultures

et al. 2009

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Nanocrystalline diamond/amorphous carbon composite films for applications in tribology, optics and biomedicine

Cited by 55 publications

References 21 publications

Nanocomposite Microstructure and Environment Self-Adapted Tribological Properties of Highly Hard Graphite-Like Film

Nanocomposite Microstructure and Environment Self-Adapted Tribological Properties of Highly Hard Graphite-Like Film

Self-mated tribological systems based on multilayer micro/nanocrystalline CVD diamond coatings

Cytotoxicity evaluation of nanocrystalline diamond coatings by fibroblast cell cultures

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