Abstract
The replicative production of complex optical lenses made of glass has become very important over the last decades. The technology precision glass moulding has a great potential to fulfil the optical demands on high surface quality, small tolerances and high uniformity of glass lenses at high production volumes. A noble metal MSIP-PVD coating is used to increase lifetime of the precision moulds. Beside the chemical resistance and protection of the moulds against the hot glass, prevention of glass sticking and oxidation adhesion between coating and substrate is of great importance. As state-of-the-art a noble metal coating based on platinum and iridium is used with a nickel interlayer. As a result of previously presented research replacement of the nickel interlayer by a chromium interlayer has increased adhesion between coating and substrate significantly. The present research work shows an increase of this adhesion as a function of interlayer thickness. Application oriented heating tests show an influence of the interlayer on the glass behaviour during the heating cycle due to a diffusion process between interlayer and toplayer. A coating system of 20 nm Cr interlayer and 300 nm Pt40Ir60 function layer exhibits a good combination between good compound adhesion and little influence on the glass behaviour.
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References
Brinksmeier E, Glaeble R, Osmer J (2011) Surface integrity demands of high precision optical molds and realization by a new process chain. Procedia Eng 19:40–43
(1974) Method for molding glass lenses, patent No. US 383 334 7
(1980) Press molding method for thick optical glass molding, patent No. JP 550 628 15
Ma KJ, Chien HH, Chuan WH, Chao CL, Hwang KC (2008) Design of protective coatings for glass lens molding. Trans Tech Publications, Switzerland
US Patent 4606750, Mold for direct press molding of optical glass element. Matsushita Electric Industrial Co., Ltd, Aug. 19, 1986
Brand J, Gadow R, Killinger A (2004) Surface and coating technology. Amsterdam, Elsevier, pp 180–181 p 213–217
Klocke F, Georgiadis K, Sarikaya H, Wang F (2008) Proceedings of the 7th international conference “THE” Coatings in manufacturing engineering, October 1–3, 2008, Chalkidiki, Greece
Wu FB, Chen WY, Duh JG, Tsai YY, Chen YI (2003) Ir-based multi-component coating on tungsten carbide by RF magnetron sputtering process. Surf Coat Technol 163–164:227–232
Bobzin K, Klocke F, Bagcivan N, Ewering M, Georgiadis K, Münstermann T (2010) Key Eng Mater 438:57–64
Bouzakis K-D, Michailidis N, Hadjiyiannis D, Efstathiou K, Pavlidou E, Erkens G, Rambadt S, Wirth I (2001) Surf Coat Technol 146–147:443
Bouzakis K-D, Siganos A, Leyendecker T, Erkens G (2004) Thin Solid Films 460:181–189
CERATIZIT GRADE GUIDE—for precision glass moulding. No. 385
Hutchinson JM, Smith S, Horne B, Gourlay GM (1999) Macromolecules 32:5046
Shelby JE (2005) Introduction to glass science and technology, 2nd edn. RSC, Cambridge
Jebsen-Marwedel H, Brückner R (2011) Glastechnische Fertigungsfehler, ISBN 978-3-642-16432-3, Springer
Schott AG (2004) TIE31: Mechanical and thermal properties of optical glass
Ray F. Egerton (2005) Physical principles of electron microscopy, ISBN 0-387-25800-0, Springer
Acknowledgments
The authors gratefully acknowledge the financial support of the Federal Ministry of Economics and Technology (BMWi) within the project “SpeedCoat – System zur schnellen und ganzheitlichen Entwicklung angepasster Schichtsysteme für Präzisionsformen in der Heißformgebung hochpräziser Glasoptiken” at the RWTH Aachen University.
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Bobzin, K., Bagcivan, N., Ewering, M. et al. Influence of interlayer thickness of a thin noble metal MSIP-PVD coating on compound and system properties for glass lens moulding. Prod. Eng. Res. Devel. 6, 311–318 (2012). https://doi.org/10.1007/s11740-012-0385-7
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DOI: https://doi.org/10.1007/s11740-012-0385-7