Structure and properties of Ti–B–C–N nanocomposite coatings synthesized using pulsed closed field unbalanced magnetron sputtering (P-CFUBMS)

Lin, Ji; Mishra, Brajendra; Moore, John J.; Pinkas, Malki; Sproul, William D.

doi:10.1016/j.surfcoat.2008.06.083

Cited by 23 publications

(6 citation statements)

References 21 publications

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“…X-ray photoelectron spectroscopy (XPS) of the C1s revealed the existence of a TiB x C y phase together with the segregation of a-C that decreased the friction although the hardness was also reduced [19,20]. Alternatively, it has been also considered the possibility of co-sputtering a unique TiC:TiB 2 combined target and a lubricant phase such as graphitic carbon [20][21][22][23][24][25] or amorphous CN x phases using Ar/N 2 mixtures [12,13]. These multiphase coatings rendered similar tribological behaviour but maintaining a moderate hardness value of 25-30 GPa, of particular interest for tribological applications.…”

Section: Introductionmentioning

confidence: 99%

Phase composition and tribomechanical properties of Ti–B–C nanocomposite coatings prepared by magnetron sputtering

Sánchez-López

Abad

Justo

et al. 2012

J. Phys. D: Appl. Phys.

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Protective nanocomposite coatings based on hard ceramic phases (TiC, TiB 2) combined with amorphous carbon (a-C) are of interest because of their adequate balance between mechanical and tribological performances. In this work, Ti-B-C nanocomposite coatings were prepared by co-sputtering of graphite and TiB 2 targets. Varying the discharge power ratio applied to the graphite and TiB 2 targets from 0 to 2, the a-C content in the coatings could be tuned from 0 to 60%, as observed by means of Raman and X-ray photoelectron spectroscopy (XPS). The microstructural characterization demonstrated a progressive decrease in crystallinity from an initial nanocrystalline (nc) TiB 2-like structure to a distorted TiB x C y ternary compound with increasing C concentration. Xray absorption near-edge structure measurements on the B K-edge helped to determine a hexagonal arrangement around the B atoms in the ternary TiB x C y phase. A fitting analysis of the C1s XPS peak allowed to evaluate the relative amount of a-C and TiB x C y components. A drastic change in hardness (from 52 to 13 GPa) and friction coefficient values (from 0.8 to 0.2) is noticed when moving from nc-TiB 2 to TiBC/a-C nanocomposites. The fraction of a-C necessary to decrease the friction below 0.2 was found to be 45 %. Raman observation of the wear tracks determined the presence of disordered sp 2-bonded carbon phase associated to the diminution of the friction level.

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Section: Introductionmentioning

confidence: 99%

Phase composition and tribomechanical properties of Ti–B–C nanocomposite coatings prepared by magnetron sputtering

Sánchez-López

Abad

Justo

et al. 2012

J. Phys. D: Appl. Phys.

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“…The combined XRD, XPS, and phase composition results suggest that possibly the Ti-Si-C coatings had a nanocomposite structure consisting of nanocrystalline TiC, Ti 3 SiC 2 in an amorphous SiC/carbon matrix, similarly to Me-Si-N nanocomposite coatings [1][2][3][4]. Fig.…”

Section: Structural Analysismentioning

confidence: 99%

“…Nanocomposite coatings are usually formed from ternary or higher order systems which are supersaturated or metastable solid solutions or comprise at least two immiscible phases: either two nanocrystalline phases or, more commonly, an amorphous phase surrounding nanocrystallites of a secondary phase, which were usually selected from various nitrides, carbides, borides, and silicides [1]. Beyond these well-known systems, Me-Si-N (Me = transition metal) are known to exhibit super-hardness, and higher oxidation and corrosion resistance than those of the Me-Si-C system [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Effect of the carbon content on the structure and mechanical properties of Ti–Si–C coatings by cathodic arc evaporation

Chang

Chen

2010

Surface and Coatings Technology

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“…With a further increase of N concentration to 20-40 at.%, the friction coefficient is reduced to 0.54 [2] . Lin et al [3] synthesized TiBCN coatings with a high friction coefficient of 0.57-0.7 when the C concentration is in the range of 11.8-15.0 at.%. W. Tillmann studied TiBCN at 6.5 at.% C concentration with the friction coefficient in the range of 0.82-0.99 [4] .…”

Section: Introductionmentioning

confidence: 99%

Low Friction-Coefficient TiBCN Nanocomposite Coatings Prepared by Cathode Arc Plasma Deposition

Lin

Wang

Wan

et al. 2015

Plasma Sci. Technol.

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TiBCN nanocomposite coatings were deposited on cemented carbide and Si (100) by a cathode arc plasma system, in which TiB2 cathodes were used in mixture gases of N2 and C2H2. X-ray diffraction shows that TiB2 and Ti2B5 peaks enhance at low flow rates of C2H2, but they shrink when the flow rate is over 200 sccm. An increase of deposition rate was obtained from different TiBCN thicknesses for the same deposition time measured by scanning electron microscopy. Atomic force microscopy shows that the surface roughnesses are ∼10 nm and ∼20 nm at C2H2 flow rates of 0-100 sccm and of 150-300 sccm, respectively. High resolution transmission electron microscopy and X-ray photoelectron spectroscopy show that the coatings consist of nanocrystal phases Ti2B5, TiB2 and TiN, and amorphous phase carbon and BN. The average crystal sizes embedded in the amorphous matrices are 200 nm and 10 nm at C2H2 flow rates of 200 sccm and 300 sccm, respectively. In Raman spectra, the D-and G-bands increase with C2H2 flows at low flow rates, but weaken at high flow rates. The microhardness of the coatings decreases from 28.6 GPa to 20 GPa as the C2H2 increases from 0 sccm to 300 sccm, and the ball-on-disk measurement shows a dramatic decrease of the friction coefficient from 0.84 to 0.13. The reason for the reduced hardness and friction coefficient with the change of C2H2 flow rates is discussed.

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Structure and properties of Ti–B–C–N nanocomposite coatings synthesized using pulsed closed field unbalanced magnetron sputtering (P-CFUBMS)

Cited by 23 publications

References 21 publications

Phase composition and tribomechanical properties of Ti–B–C nanocomposite coatings prepared by magnetron sputtering

Phase composition and tribomechanical properties of Ti–B–C nanocomposite coatings prepared by magnetron sputtering

Effect of the carbon content on the structure and mechanical properties of Ti–Si–C coatings by cathodic arc evaporation

Low Friction-Coefficient TiBCN Nanocomposite Coatings Prepared by Cathode Arc Plasma Deposition

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