Use of Cluster Analysis for Assessment of Surface Replicas Machined by a Laser Beam

Abstract

This article deals with research of replica preparation of polypropylene surfaces machined by a laser beam. For the production of replicas, we decided to test the material SILOFLEX © which is mainly used in dentistry. There we are also looking for expertise in the preparation and application of this material on the surfaces. Subsequently investigated methods of statistical evaluation. In this article the cluster analysis is primarily used, this analysis uses four basic methods: Ward's Minimum Variance, Furthest Neighbour, Weighted Pair-Group and Pair-Weighted Centroid Group. The results are there also demonstrated using Abbott Firestone curves. The result of the article is to demonstrate the similarity of the amplitude of surface roughness parameters using above mentioned four methods Cluster analysis using Cophenetic correlation coefficient and using average values of cumulative totals compiled into the Abbott Firestone curve and the replica of the original surface. Original surfaces and replicas will be scanned using a contactless 3D scanner Talysurf CLI 500.

The use of FIB for the preparation of a structure analogous to the natural sur-face and its replication by selected types of polymers

“…FIB-SEM is usually used for imaging of the structures of the different materials on a micrometer and nanometer scale for micro-, nanopreparation of the structures. [2,3,4,5,6,7,8] The content of the presented text is experimental verification of the possibility of using a focused ion beam for the preparation of surface structures analogous to natural patterns and the use of the two-step imprinting method to obtain replicas of the surface. Different polymeric materials (water-alcohol-soluble polymers, amorphous and crystallizing polymers) were used for the experiment to describe their ability to replicate the surface formed by FIB.…”