Nowadays thermal plasma spray coating is widespread in automobile industry. For example, in the cylinder
manufacturing process coatings are applied for friction reduction, wear and corrosion resistance. After the honing
process, a coated surface exhibits porous microstructures, which are often characterized in order to understand functional
correlations between key parameters of the pores and friction performance. In this paper, spatial point pattern analysis is
used to investigate the pores’ distribution in a two dimensional space. Methods, such as nearest neighbor analysis and
Ripley’s K-function, are used to conduct the experiments to analyze the observer’s pattern. Different edge correction
methods in Ripley’s K-function are introduced. Confidence envelopes are simulated using the Monte Carlo method.
Experimental results are presented to reveal the patterns of pores, where influences of the selected measurement area on
the results are taken into account and further discussed.
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