## 3 Results
### Results of Experimental Studies  
After the diamond sliding burnishing process, surface roughness parameters were measured: the root mean square height \(\mathrm{Sq}\) [\(\mathrm{\SIUnitSymbolMicro m}\)]; skewness Ssk [-]; kurtosis Sku [-]; the maximum peak heigh of the surface \(\mathrm{Sp}\) [\(\mathrm{\SIUnitSymbolMicro m}\)]; the maximum pit height of the surface \(\mathrm{Sv}\) [\(\mathrm{\SIUnitSymbolMicro m}\)]; the maximum heigh of the surface \(\mathrm{Sz}\) [\(\mathrm{\SIUnitSymbolMicro m}\)]; the arithmetical mean height of the surface \(\mathrm{Sa}\) [\(\mathrm{\SIUnitSymbolMicro m}\)]. Other factors measured were the height parameters of the roughness profile: the average maximum profile height of the ten largest peak-to-valley separations in the evaluation area \(\mathrm{Rz}\) [\(\mathrm{\SIUnitSymbolMicro m}\)], the arithmetical mean deviation of the profile \(\mathrm{Ra}\) assessed [\(\mathrm{\SIUnitSymbolMicro m}\)] and the total height of the profile \(\mathrm{Rt}\) [\(\mathrm{\SIUnitSymbolMicro m}\)] (Table 4). The measurements were carried out in the Laboratory of micro- and nanoengineering located in the Department of Precision Mechanics, the Koszalin University of Technology, using a Taylor Hobson Precision device with the TalySurf CCI6000 system. A Nikon lens with a magnification of 50\(\times\) was used. The results were processed in the TalyMap Platinum program. Examples of the surface roughness results according to the Ra parameter after the sliding burnishing process are listed in Table 5. The view of the surface of the sample after grinding and after diamond sliding burnishing is shown in Figure 15. \begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \hline \multirow{2}{*}{**Plan**} & \multicolumn{6}{c}{**Surface Roughness Parameters**} & \multicolumn{6}{c}{**Profile Roughness Parameters**} \\ \cline{2-10}  & **Sq [\(\mathrm{\SIUnitSymbolMicro m}\)]** & **Ssk [-]** & **Sku [-]** & **Sp [\(\mathrm{\SIUnitSymbolMicro m}\)]** & **Sv [\(\mathrm{\SIUnitSymbolMicro m}\)]** & **Sz [\(\mathrm{\SIUnitSymbolMicro m}\)]** & **Sa [\(\mathrm{\SIUnitSymbolMicro m}\)]** & **Rz [\(\mathrm{\SIUnitSymbolMicro m}\)]** & **Rt [\(\mathrm{\SIUnitSymbolMicro m}\)]** & **Ra [\(\mathrm{\SIUnitSymbolMicro m}\)]** \\ \hline
1 & 0.465 & \(-\)0.028 & 3.14 & 2.39 & 2.54 & 4.93 & 0.369 & 1.98 & 2.30 & 0.326 \\
2 & 0.769 & \(-\)0.189 & 3.51 & 4.30 & 4.01 & 8.31 & 0.614 & 5.11 & 6.30 & 0.549 \\
3 & 0.583 & \(-\)0.255 & 3.70 & 5.20 & 2.94 & 8.14 & 0.444 & 2.74 & 3.22 & 0.384 \\
4 & 0.721 & 0.098 & 3.31 & 3.82 & 4.38 & 8.20 & 0.568 & 4.65 & 5.17 & 0.557 \\
5 & 0.753 & 0.003 & 3.18 & 3.74 & 3.96 & 7.70 & 0.599 & 4.23 & 4.52 & 0.556 \\
6 & 0.567 & \(-\)0.149 & 3.51 & 3.75 & 3.46 & 7.21 & 0.441 & 3.37 & 3.48 & 0.396 \\
7 & 0.673 & \(-\)0.187 & 3.36 & 3.66 & 3.82 & 7.47 & 0.528 & 3.87 & 4.40 & 0.479 \\
8 & 0.957 & \(-\)0.543 & 3.94 & 4.38 & 5.66 & 10.0 & 0.740 & 5.11 & 5.90 & 0.605 \\
9 & 0.722 & \(-\)0.212 & 3.30 & 3.84 & 4.48 & 8.32 & 0.571 & 3.59 & 4.06 & 0.529 \\
10 & 0.810 & \(-\)0.378 & 3.82 & 5.50 & 4.66 & 10.2 & 0.625 & 3.42 & 4.84 & 0.549 \\
11 & 0.754 & \(-\)0.245 & 3.44 & 3.98 & 4.51 & 9.20 & 0.613 & 3.61 & 4.13 & 0.473 \\
12 & 0.796 & \(-\)0.276 & 3.37 & 4.45 & 4.47 & 9.75 & 0.587 & 3.49 & 4.66 & 0.508 \\
13 & 0.783 & \(-\)0.306 & 3.67 & 4.38 & 4.58 & 8.64 & 0.596 & 3.54 & 4.28 & 0.504 \\ \hline \hline \end{tabular}
\end{table} 
Table 4: Average values of surface and profile roughness parameters.