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  4. Influence of Glassy Carbon Surface Finishing on its Wear Behavior during Precision Glass Moulding of Fused Silica
 
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2019
Journal Article
Titel

Influence of Glassy Carbon Surface Finishing on its Wear Behavior during Precision Glass Moulding of Fused Silica

Abstract
Laser technology has a rising demand for high precision Fused Silica components. Precision Glass Moulding (PGM) is a technology that can fulfil the given demands in efficiency and scalability. Due to the elevated process temperatures of almost 1400 C and the high mechanical load, Glassy Carbon was qualified as an appropriate forming tool material for the moulding of Fused Silica. Former studies revealed that the tools surface finishing has an important influence on wear behaviour. This paper deals with investigation and analysis of surface preparation processes of Glassy Carbon moulds. In order to fulfil standards for high precision optics, the finishing results will be characterised by sophisticated surface description parameters used in the optics industry. Later on, the mould performance, in terms of wear resistance, is tested in extended moulding experiments. Correlations between the surface finish of the Glassy Carbon tools and their service lifetime are traced back to fundamental physical circumstances and conclusions for an optimal surface treatment are drawn.
Author(s)
Grunwald, Tim
WZL der RWTH Aachen; Fraunhofer IPT
Wilhelm, Dennis Patrick
Fraunhofer-Institut für Produktionstechnologie IPT
Dambon, Olaf
Fraunhofer-Institut für Produktionstechnologie IPT
Bergs, Thomas
WZL der RWTH Aachen; Fraunhofer IPT
Zeitschrift
Materials
Funder
Deutsche Forschungsgemeinschaft DFG
DOI
10.3390/ma12050692
File(s)
N-538041.pdf (7.55 MB)
Language
English
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Fraunhofer-Institut für Produktionstechnologie IPT
Tags
  • glassy carbon

  • surface finishing

  • polishing

  • precision glass mould...

  • fused silica

  • white light interfero...

  • atomic force microsco...

  • wear

  • adhesion

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