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Manufacturing-induced surface contaminations

  • Summary In the course of classical optics manufacturing glass components are in permanent direct contact with aqueous operating materials. Such contact leads to a certain absorption of water and hydrogenous compounds that may induce severe glass defects. In this contribution, absorption of hydrogen and other contaminants during grinding of glass was observed and qualitatively detected via laser-induced breakdown spectroscopy. It is shown that hydrogen, calcium, magnesium, and carbon are implanted into the glass surface where the contaminant concentration increases over grinding time or contact time of the glass surface with water and the grinding tool, respectively. The contaminants hydrogen, calcium, and magnesium can be attributed to the water used as lubricant. In contrast, carbon most likely originates from wear debris of the used silicon carbide grinding pads. Several possible mechanisms that lead to such surface contamination of glasses during grinding – diffusion, accumulation in micro cracks as well as the formation of hydrated silica – are finally introduced.

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Metadaten
Author:Christoph GerhardORCiD, Alexander Dobis
URN:urn:nbn:de:kobv:526-opus4-15656
DOI:https://doi.org/https://doi.org/10.1002/vipr.202100752
DOI (Version of Record):https://doi.org/10.1002/vipr.202100752
Parent Title (English):Vakuum in Forschung und Praxis
Publisher:Wiley
Document Type:Article
Language:English
Year of Publication:2021
Publishing Institution:Technische Hochschule Wildau
Release Date:2021/12/17
Volume:33
Issue:1
First Page:33
Last Page:37
Source:Gerhard, C. and Dobis, A. (2021), Manufacturing-induced surface contaminations. Vakuum in Forschung und Praxis, 33: 33-37. https://doi.org/10.1002/vipr.202100752
Faculties an central facilities:Fachbereich Ingenieur- und Naturwissenschaften
Dewey Decimal Classification:6 Technik, Medizin, angewandte Wissenschaften / 62 Ingenieurwissenschaften / 621 Angewandte Physik
Licence (German):Creative Commons - CC BY - Namensnennung 4.0 International
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