International comparison of surface-texture parameters organized by the Asia-Pacific Metrology Programme

摘要

This paper reports on an international comparison of surface-texture parameters, R_(a), R_(y5) and R_(y), carried out between nine national metrology institutes from 1996 to 1998 under the auspices of the Asia-Pacific Metrology Programme (APMP) and coordinated by the CSIRO National Measurement Laboratory (NML, Australia). The results show that the consistency of the R_(a) measurements is generally better than that of the R_(y5) and R_(y) measurements, which appear to split into two sub-groups with some crossover. Agreement is somewhat better for artefacts of higher surface roughness. Measurements of step height were also made as a potential indicator of correlation between the basic length scale and the surface-roughness parameters. These show satisfactory agreement, within the stated uncertainties and with the normalized error, E_(n), values <1 in all cases.