Table 1.
Surface topography, including line roughness (Ra, Rz, Rq, Rv, Rp, RSm) and surface roughness (Sa, Sz, Sq, Sv, Sp) parameters of SS 320, SS 240 and PTFE a.
| Material | Line Roughness [µm] b | Surface Roughness [µm] c | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Ra | Rz | Rq | Rv | Rp | RSm | Sa | Sz | Sq | Sv | Sp | |
| SS 320 | 0.5 ± 0.0 | 2.5 ± 0.1 | 0.7 ± 0.0 | 1.3 ± 0.1 | 1.5 ± 0.1 | 10.2 ± 0.5 | 0.7 | 7.5 | 0.6 | 2.7 | 2.9 |
| SS 240 | 1.0 ± 0.0 | 4.2 ± 0.1 | 1.0 ± 0.1 | 1.7 ± 0.1 | 2.1 ± 0.1 | 10.7 ± 1.3 | 1.1 | 17.6 | 1.0 | 9.7 | 5.1 |
| PTFE | 0.2 ± 0.0 | 0.9 ± 0.2 | 0.3 ± 0.1 | 0.5 ± 0.1 | 0.4 ± 0.1 | 9.7 ± 2.2 | 0.5 | 15.1 | 0.5 | 6.9 | 3.2 |
a SS 320 and SS 240, Stainless steel with a grit of 320 and 240; PTFE, polytetrafluoroethylene; Ra, arithmetic mean roughness value; Rz, mean roughness depth; Rq, root mean square deviation; Rv, maximum depth of valleys; Rp, the maximum height of peaks; RSm, mean spacing at the mean line; Sa, mean arithmetic height of surface roughness; Sz, the maximum height of surface roughness; Sq, root mean square height; Sv, maximum pit height; Sp, maximum peak height; b Means ± standard deviation of 41 line roughness measurements; c for surface roughness single measurements were performed.