Tribotechnical Properties of Nickel Based Cermet Materials

Sevostyanov, N. V.; Bolshakova, A. N.; Bolsunovskaya, T. A.; Burkovskaya, N. P.

doi:10.3103/s1068366621050111

Cited by 4 publications

(1 citation statement)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…One major drawback of this approach is ignoring the counterbody while increasing bearing hardness straightforwardly to reduce wear. The addition of hard inclusions such as carbides and oxides may increase the life cycle of a bearing, intensifying the wear rate of shafts as well, which are much more expensive and difficult to replace and repair [6,7]. On the other hand, soft (white) metals, such as tin and lead, significantly increase the tribological 2 of 23 properties but reduce the mechanical ones.…”

Section: Introductionmentioning

confidence: 99%

Study of Adaptation Processes in Tribofilms during Friction of Antifriction Aluminum Alloys for Journal Bearings

Podrabinnik,

Gershman,

Mironov

et al. 2023

Metals

View full text Add to dashboard Cite

This paper provides results on the tribological behavior of experimental Al–Sn–Pb–Si–Cu–Mg–Zn aluminum alloys and describes the adaptation phenomena that reduce wear intensity during friction with steel. The main focus is on tribofilm formation, which plays an important role in friction energy dissipation. The alloys were tested in a rig imitating a journal-bearing shaft couple, and the friction surfaces were studied by the scanning electron microscopy, energy-dispersive analysis and X-ray photoelectron spectroscopytechniques. Based on the analysis, a conclusion on processes and tribochemical reactions was made. Compared to the initial state, eight new compounds were found on the friction surface. In the most wear-resistant alloy, magnesium precipitated from a solid solution with the subsequent oxidation. The same process was detected for zinc in the least wear-resistant alloy due to its low magnesium content. Furthermore, CuSn3 and PbS compounds, which require >600 °C temperature to compose, were found in tribofilms, indicating that the rubbing body lost thermodynamic equilibrium during friction. The revealed processes are non-spontaneous and decrease the wear intensity of the alloys, as they are accompanied by negative entropy production and dissipation of friction energy. Stepwise depth XPS analysis also showed the functional levels of the tribofilms.

show abstract

Section: Introductionmentioning

confidence: 99%