Structure, mechanical and tribological properties of TaCx composite films with different graphite powers

Hu, Jiaojiao; Li, Hang; Li, Jianliang; Huang, Jingjing; Kong, Jian; Zhu, Heguo; Xiong, Dangsheng

doi:10.1016/j.jallcom.2020.153769

Cited by 13 publications

(3 citation statements)

References 40 publications

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“…Coating 5 demonstrated hardness H = 28.3 GPa, Young's modulus E = 288 GPa, and elastic recovery W = 76.4%. The mechanical properties of coatings increased at higher carbon concentrations, similar to the results obtained in [41,42]. The increase in mechanical properties can be partially attributed to the increase of compressive stresses in the carbon-rich coatings (Table 2).…”

Section: Resultssupporting

confidence: 79%

Structure, Oxidation Resistance, Mechanical, and Tribological Properties of N- and C-Doped Ta-Zr-Si-B Hard Protective Coatings Obtained by Reactive D.C. Magnetron Sputtering of TaZrSiB Ceramic Cathode

Kiryukhantsev-Korneev

Сытченко

Vorotilo

et al. 2020

Coatings

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Coatings in the Ta-Zr-Si-B-C-N system were produced by magnetron sputtering of a TaSi2-Ta3B4-(Ta,Zr)B2 ceramic target in the Ar medium and Ar-N2 and Ar-C2H4 gas mixtures. The structure and composition of coatings were studied using scanning electron microscopy, glow discharge optical emission spectroscopy, energy-dispersion spectroscopy, and X-ray diffraction. Mechanical and tribological properties of coatings were determined using nanoindentation and pin-on-disk tests using 100Cr6 and Al2O3 balls. The oxidation resistance of coatings was evaluated by microscopy and X-ray diffraction after annealing in air at temperatures up to 1200 °C. The reactively-deposited coatings containing from 30% to 40% nitrogen or carbon have the highest hardness up to 29 GPa and elastic recovery up to 78%. Additionally, coatings with a high carbon content demonstrated a low coefficient of friction of 0.2 and no visible signs of wear when tested against 100Cr6 ball. All coatings except for the non-reactive ones can resist oxidation up to a temperature of 1200 °C thanks to the formation of a protective film based on Ta2O5 and SiO2 on their surface. Coatings deposited in Ar-N2 and Ar-C2H4 demonstrated superior resistance to thermal cycling in conditions 20-T−20 °C (where T = 200–1000 °C). The present article compares the structure and properties of reactive and “standard-inert atmosphere” deposited coatings to develop recommendations for optimizing the composition.

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Section: Resultssupporting

confidence: 79%

Structure, Oxidation Resistance, Mechanical, and Tribological Properties of N- and C-Doped Ta-Zr-Si-B Hard Protective Coatings Obtained by Reactive D.C. Magnetron Sputtering of TaZrSiB Ceramic Cathode

Kiryukhantsev-Korneev

Сытченко

Vorotilo

et al. 2020

Coatings

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“…It has to be noted that often such conditions have been marked as dry conditions in literature, while those may be considered simply as unlubricated conditions. Most studies have been performed at ambient temperature and pressure, while few deal with wear studies and friction tests at higher temperature [4][5][6][7][8][9][10][11]16,21,24,30,[38][39][40][41][42][43][44]49,52,[55][56][57]61,[66][67][68][69][70]. The wear mechanisms identified in tests carried out at ambient temperature and in humid air are abrasive wear and tribochemical reactions, resulting in third-body conditions; the constitution and microstructure of the nanocomposite thin films determine the predominant wear and friction scenario (dependent also on the tribosystem in general).…”

Section: Introductionmentioning

confidence: 99%

Wear Study of a Magnetron-Sputtered TiC/a-C Nanocomposite Coating under Media-Lubricated Oscillating Sliding Conditions

Schneider

Ulrich

Patscheider³

et al. 2022

Coatings

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Friction and wear performance of non-reactively magnetron-sputtered hydrogen-free TiC/a-C coatings were characterized under lubricated oscillating sliding conditions against 100Cr6 steel. The friction mediators, isooctane, ethanol and distilled water, were chosen to address the actual trend of environmentally friendly green technologies in mobility and the potential use of carbon-based nanocomposite thin film materials for tribocomponents in contact with gasoline and alternative biofuels. Sliding pairs of the TiC/a-C coatings showed significantly reduced friction and wear compared to the reference materials under both unlubricated and lubricated conditions (when using the aforementioned media isooctane, ethanol and distilled water). Quasi-stationary friction coefficient of the TiC/a-C sliding pairs after running-in was almost independent of test conditions and could be traced back to self-lubrication as a result of the formation of a transfer layer on the steel counter body. Wear of the coatings based on micro-abrasion and tribochemical reaction was significantly influenced by the environmental conditions. Lowest wear was measured after tests in non-polar isooctane whereas highest wear was measured after tests in water.

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“…Among transition metal carbides, tantalum carbide (TaC) has attracted considerable attention since it has high hardness, good thermal stability, high melting temperature (3880 • C), low contact resistance, and excellent tribological performance. Based on its superior performance and promising applications in industry, nanocomposite TaC coatings have been prepared and studied by a variety of modern surface modification technologies, such as hot pressing [17], magnetron sputtering [1] [18][19] [20][21] [22] [23], in situ reaction (ISR) technique [24] [25], carburization [26] [27], pulsed laser ablation deposition [28][29] [30], chemical vapor deposition [31] [32], electrodeposition [33] and so on. Among them, one of the most widely used techniques to grow TaC films is direct current (DC) magnetron sputtering.…”

Section: Introductionmentioning

confidence: 99%

Structure, mechanical and tribological properties, and oxidation resistance of TaC/a-C:H films deposited by high power impulse magnetron sputtering

Luo

Yazdi

Chen

et al. 2020

Ceramics International

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Structure, mechanical and tribological properties of TaCx composite films with different graphite powers

Cited by 13 publications

References 40 publications

Structure, Oxidation Resistance, Mechanical, and Tribological Properties of N- and C-Doped Ta-Zr-Si-B Hard Protective Coatings Obtained by Reactive D.C. Magnetron Sputtering of TaZrSiB Ceramic Cathode

Structure, Oxidation Resistance, Mechanical, and Tribological Properties of N- and C-Doped Ta-Zr-Si-B Hard Protective Coatings Obtained by Reactive D.C. Magnetron Sputtering of TaZrSiB Ceramic Cathode

Wear Study of a Magnetron-Sputtered TiC/a-C Nanocomposite Coating under Media-Lubricated Oscillating Sliding Conditions

Structure, mechanical and tribological properties, and oxidation resistance of TaC/a-C:H films deposited by high power impulse magnetron sputtering

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