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. 2022 Mar 10;15(6):2052.
doi: 10.3390/ma15062052.

Study of Nano h-BN Impact on Lubricating Properties of Selected Oil Mixtures

Wiesław Urbaniak  1 , Tomasz Majewski  2 , Iwona Powązka  3 , Grzegorz Śmigielski  1 , Aneta D Petelska  4
Affiliations

Study of Nano h-BN Impact on Lubricating Properties of Selected Oil Mixtures

Wiesław Urbaniak et al. Materials (Basel). .

Abstract

Our experiments aimed to study the influence of layered materials with nanometric-scale particles, which are part of lubricant oils, on their tribological properties. The object of this study was a lubricant oil made using base oil PAO4, which contained nanoparticle hexagonal boron nitride (nano h-BN) and a dispersant based on succinic acid imide. Comparative tests for engine oil (CB30) were also performed. The paper presents the method of preparing the test material and the tribological test results, including wear spot diameter (wear mark), limit wear load, and seizure load. The test results obtained demonstrate that nano-hexagonal boron nitride improves the tribological properties of lubricant oils. However, oil preparation and the quantitative selection of components markedly influence the results.

Keywords: CB30; PAO4; friction; hexagonal boron nitride; lubricity; nanomaterials.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Model of lamellar lubrication in (a)—natural (biological) bearing and (b)—oil-colored porous bearings with the addition of h-BN [7].
Figure 2
Figure 2
T02U I Silesia four-ball tester, (a) picture of the measuring device, (b) diagram of a four-ball friction node (1, top ball; 2, bottom balls; 3, 4, holders) [21].
Figure 3
Figure 3
Hexagonal boron nitride (h-BN) (a) scanning microscope image; (b) crystallographic lattice diagram [7].
Figure 4
Figure 4
Pictures of sample wear spots following the test for samples are presented in Table 6.
Figure 5
Figure 5
Summary of wear spot diameter measurement results.
Figure 6
Figure 6
Limit wear load GOZ as a function of base oil used and h-BN and surfactant addition.
Figure 7
Figure 7
Seizure load values obtained.
See this image and copyright information in PMC

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