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New nickel plated metal mirrors utilizing meltspun aluminium silicon alloy

 
: Gebhardt, A.; Risse, S.; Peschel, T.; Senden, R.; Bosch, A.J.

European Society for Precision Engineering and Nanotechnology -EUSPEN-:
EUSPEN 2009, 9th International Conference of the European Society for Precision Engineering & Nanotechnology. Proceedings. Vol.2 : 2nd-5th June 2009, San Sebastian, Spain
Bedford: Euspen, 2009
ISBN: 978-0-9553082-6-0
pp.427-430
European Society for Precision Engineering and Nanotechnology (International Conference) <9, 2009, San Sebastian>
English
Conference Paper
Fraunhofer IOF ()

Abstract
High performance metal mirrors require a polishable surface layer to achieve the demands for the UV/VIS wavelengths. The amorphous electroless nickel (NiP) offers the possibility for the manufacturing of mirrors with exceilent figure and roughness [1]. However, the mirror substrate material particularly aluminium 6061 has a signiliicant mismateh in the coefficient of thermal expansion (CTE). Due to temperature changes, the bimetailic effcct introduces figure distortions. The ncw idea is tu match the CTE by using a meitspun aluminium alloy with a high silicon contents (\'12 40 %) as mirror substrate [2]. Besides the matching of the CTE, the specific stiffness shows a considerable increase compared to A1606 1.

: http://publica.fraunhofer.de/documents/N-104908.html