Effect of doping elements on the friction and wear properties of SiC in unlubricated sliding condition

“…Sintered silicon carbide (SiC), widely used as a hard mating material, is a potential candidate but its friction and wear properties need to be investigated in the scope of these new applications. Silicon carbide offers good mechanical properties (high hardness, high Young modulus), good corrosion resistance and good thermal conductivity, that make it suitable for tribological applications in different atmosphere (in air, argon or vacuum) 1,2 and in dry or lubricated sliding. 3,4 Overall, it shows a coefficient of friction in the range of 0.2-0.7 and a low wear rate, particularly when lubricated.…”

Section: Introductionmentioning

confidence: 99%

Tribological characterization of silicon carbide and carbon materials

Lafon-Placette

Delbé

Denape

et al. 2015

Journal of the European Ceramic Society

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OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. AbstractTribological properties of a silicon carbide in homogeneous contact configuration are often related in lubricated or even dry conditions but only for ball or pin-on-disk configurations. The present study develops an experiment using a ring-on-ring device under dry friction in order to better match the industrial needs for dry mechanical seals applications. Tribological tests were run at a temperature of 120• C, a sliding speed of 2 m/s and a contact pressure of 0.15 MPa on SiC/SiC and SiC/C pairs, with different impregnated carbon materials. The measurements were sensitive to the formation and the circulation of the third body at the contact interface. This third body was mainly composed by carbon, oxygen and the carbon impregnants. An amorphization process of the tribofilm was revealed by using Raman spectroscopy. Based on chemical analysis and mechanical considerations, the wear mechanisms were found to be driven by cracking process and oxidation.

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“…In many of the above-mentioned applications, the friction and wear resistance properties are important. Reviewing the existing literature, [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] it has been noted that the majority of the tribological investigations of SiC was carried out under dry lubricated conditions as well as in an aqueous environment.…”

Section: Introductionmentioning

confidence: 99%

Microfracture and Limited Tribochemical Wear of Silicon Carbide During High‐Speed Sliding in Cryogenic Environment

Guha¹,

Basu²

2010

Journal of the American Ceramic Society

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In an effort to develop an understanding of the tribological properties of silicon carbide (SiC) in a cryogenic environment, this contribution reports on the results of the sliding wear properties of the self‐mated SiC in liquid nitrogen (LN2). Two sets of sliding wear tests were conducted in a planned manner in LN2 under varying combinations of operating conditions, using a specially designed high‐speed cryo‐tribometer. In the first set, the sliding velocity is varied up to 1.1 m/s, for 600 s, at a constant load of 5 N; while the second set of experiments were conducted with loads of 5, 10, and 15 N, at a constant speed of 3.3 m/s for 900 s, thereby enabling to evaluate tribological potential over a broad spectrum of operating conditions. In our experiments, high coefficient of friction (COF) (0.28–0.40) and high wear resistance (∼10−7–10−6 mm3/N m) have been measured for self‐mated SiC. The topographical observations using a scanning electron microscope reveal that limited tribochemical layer formation, as well as grain boundary microfracture‐induced damage mechanisms, contribute to the wear of self‐mated SiC. The experimental results are critically analyzed with reference to flash temperature and contact stress conditions, as well as compared with some baseline experiments, conducted under ambient conditions. A comparison with our earlier research results, obtained with self‐mated Al2O3 or ZrO2, establishes the good tribological potential of self‐mated SiC in LN2, in terms of exhibiting a better combination of COF and wear rate.

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Effect of doping elements on the friction and wear properties of SiC in unlubricated sliding condition

Cited by 35 publications

References 19 publications

Dry sliding wear behavior of nano-sized SiC pins against SiC and Si3N4 discs

Dry sliding wear behavior of nano-sized SiC pins against SiC and Si3N4 discs

Tribological characterization of silicon carbide and carbon materials

Microfracture and Limited Tribochemical Wear of Silicon Carbide During High‐Speed Sliding in Cryogenic Environment

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