Microstructure, tribological and cutting performance of Ti-DLC/α-C:H multilayer film on cemented carbide

Huang, Lei; Yuan, Jun; Li, Chao; Hong, Dongbo

doi:10.1016/j.surfcoat.2018.08.076

Cited by 60 publications

(26 citation statements)

References 30 publications

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“…Thus, the introduction of Ti and N into the coating structure causes an increase in the number of carbon atoms in the state with sp 3 -hybridization of bonds compared to undoped and doped only with titanium, which is typical for the coating with a high content of the diamond phase. This The Structure and Properties of a-C:Ti and a-C:Ti:N Coatings behavior of Csp 2 /Csp 3 is close agreement with the data obtained Raman spectroscopy and is confirmed by the results presented in [15,16].…”

Section: Resultssupporting

confidence: 90%

The Structure and Properties of a-C:Ti and a-C:Ti:N Coatings Deposited on a Titanium and Titanium Nitride Sublayer

Jiang

Piliptsou

Rogachev

et al. 2021

Lecture Notes in Mechanical Engineering

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This paper presents the deposition of Ti(TiN)/a-C:Ti(TiN) coatings, doped by titanium and nitrogen atoms on steel 316L and Si substrates, to study the microstructures and mechanical properties. The coatings were obtained using titanium cathode DC and graphite target pulse arc sputtering under nitrogen pressure of 10 -1 Pa. The phase composition in the coatings was studied by XPS and Raman spectroscopy. XPS results showed that Ti-C bonds formed in the Ti/TiN/a-C:Ti coating, while Ti-N, Ti-C, C-N bonds were observed in the Ti/TiN/a-C:Ti:N coatings. Raman spectroscopy exhibited that the doped titanium layers into a-C coatings decrease the size of Csp 2 clusters. An increased disordering was also observed in Csp 2 clusters, which is essential for the mechanical properties. The surface microstructure of the coatings was further characterized by AFM, which indicated strong dependences on the droplet phase, grain size, and nature (such as graphite, titanium carbide, titanium carbonitride) the coating. The microhardness of coatings rose to 12.5 GPa. The doped titanium layers decreased internal stresses in Ti/TiN/a-C:Ti, i.e., 108,1 MPa. The friction coefficient is less than 0.3, dependent on the presence of Ti atoms in a-C coatings. Internal stresses are reduced due to the introduction of doping elements and soft metal layers in the coating structure. The change in the sp 2 /sp 3 ratio determines the change in microhardness values and kinetics of friction.

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Section: Resultssupporting

confidence: 90%

The Structure and Properties of a-C:Ti and a-C:Ti:N Coatings Deposited on a Titanium and Titanium Nitride Sublayer

Jiang

Piliptsou

Rogachev

et al. 2021

Lecture Notes in Mechanical Engineering

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“…They can be used to increase hardness [ 1 , 2 , 3 ], improve wear resistance, reduce the coefficient of friction [ 1 , 2 , 3 , 4 , 5 ] and enhance the biocompatibility of the modified surface [ 6 , 7 ] or its resistance to colonisation by micro-organisms [ 7 , 8 ]. Due to their advantages, diamond-like carbon (DLC) coatings are tested in a wide range of applications in very different areas: biomedicine [ 5 , 6 , 7 , 8 , 9 ], machining [ 10 , 11 ], electronics [ 12 , 13 ] and electrochemistry [ 14 , 15 ]. To date, there are many known techniques for producing DLC coatings, with the dominant methods being chemical vapour deposition (CVD) and physical vapour deposition (PVD).…”

Section: Introductionmentioning

confidence: 99%

Impact of Plasma Pre-Treatment on the Tribological Properties of DLC Coatings on PDMS Substrates

et al. 2021

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The processes of the deposition of carbon coatings on PDMS (polydimethylsiloxane) substrates using plasma techniques are widely used in a large number of studies, in applications ranging from electronic to biological. That is why the potential improvement of their functional properties, including tribological properties, seems very interesting. This paper presents an analysis of the impact of plasma pre-treatment on the properties of the produced diamond-like carbon (DLC) coatings, including changes in the coefficients of friction and wear rates. The initial modification processes were performed using two different techniques based on low-pressure plasma (RF PACVD, radio-frequency plasma-assisted chemical vapour deposition) and dielectric barrier discharge (DBD) plasma. The effects of the above-mentioned treatments on the geometric structure of the PDMS surface and its water contact angles and stability over time were determined. The basic properties of the DLC coatings produced on unmodified substrates were compared to those of the coatings subjected to plasma pre-treatment. The most interesting effects in terms of tribological properties were achieved after the DBD process and production of DLC coatings, achieving a decrease in wear rates to 2.45 × 10−8 mm3/Nm. The tests demonstrate that the cross-linking of the polymer substrate occurs during plasma pre-treatment.

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“…7. The rapid decrease in CoF of the raw NBR rubber at the beginning of the tribo-test was associated to the effect of flash temperature rising on the contact area [37]. CoF subsequently reaches the steady value of~1.2.…”

Section: Tribologymentioning

confidence: 96%

On the adhesion and wear resistance of DLC films deposited on nitrile butadiene rubber: A Ti-C interlayer

Liu

Cao

et al. 2020

Diamond and Related Materials

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To promote the adhesion strength between diamond-like carbon (DLC) films and nitrile butadiene rubber (NBR) substrates, titanium-doped carbon (Ti-C) films prepared by dual-target magnetron sputtering under varied substrate bias voltages were used as an interlayer on the rough NBR. The surface topography and structure of Ti-C films were investigated by atomic force microscopy (AFM) and Raman spectra. Raman analysis indicates that the increase of substrate bias voltage leads to an increase of the number or the size of sp 2 clusters in the Ti-C interlayer. The adhesion strength and tribological properties of DLC films coated on NBR substrate were scrutinized by a scratch tester and a ball-on-disk tribometer, respectively. It was found that DLC film with a Ti-C interlayer at a certain bias voltage exhibited superior wear resistance with a low coefficient of friction (CoF) during the sliding of 6000 laps. No clear damages in the coatings were observed from the wear tracks. Besides, the scratch test also revealed a reliable adhesion when the interlayer was prepared at −150 V, as confirmed by a scratch crack width of~50 μm as compared to that of the pure DLC film increasing to~120 μm. Therefore, a Ti-C interlayer could significantly enhance the adhesion and wear resistance of DLC thin films deposited on NBR.

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Microstructure, tribological and cutting performance of Ti-DLC/α-C:H multilayer film on cemented carbide

Cited by 60 publications

References 30 publications

The Structure and Properties of a-C:Ti and a-C:Ti:N Coatings Deposited on a Titanium and Titanium Nitride Sublayer

The Structure and Properties of a-C:Ti and a-C:Ti:N Coatings Deposited on a Titanium and Titanium Nitride Sublayer

Impact of Plasma Pre-Treatment on the Tribological Properties of DLC Coatings on PDMS Substrates

On the adhesion and wear resistance of DLC films deposited on nitrile butadiene rubber: A Ti-C interlayer

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