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Copper-Nickel Alloy Coating on Cast Iron by Cold Spray: Microstructure and Thermal Analysis

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Abstract:

Glass containers are manufactured by pressing or blowing a hot glass gob (700-1200°C) onto a metallic mould. Beside forming the glass, moulds are heat exchangers for cooling down the glass final product. To this goal, moulds are made of cast iron or copper-nickel alloy due to their thermal properties. If copper-nickel (nickel aluminium bronze) is the most efficient material, cast iron is mainly used for economic purposes. To enhance the properties of the cast iron mould, cold spray coating of a copper-nickel alloy is investigated. Optimization of the parameters process such as spraying temperature (800-1000°C), pressure (40-50bar) and gun’s travel speed (200-400mm/s) lead to a dense and well-bonded “bronze” coating on cast iron. Microstructural analysis is performed thanks to Optical Microscope, Scanning Electron Microscope, Electron BackScattered Diffraction, X-Rays Diffraction and microhardness tests. Finally, a simple thermal experiment has been designed for demonstrating thermal performances of the coating-substrate couple.

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Periodical:

Solid State Phenomena (Volume 384)

Pages:

25-31

DOI:

https://doi.org/10.4028/p-CW2nwu

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Online since:

January 2026

Authors:

Timothée Lauridant*, Aya Rostom, François Brisset, Fazati Bourahima

Keywords:

Cast Iron, Cold Spray, Copper-Nickel Alloy, Microstructure, Thermal Conductivity

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© 2026 Trans Tech Publications Ltd. All Rights Reserved

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* - Corresponding Author

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