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1368 |
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Wednesday, June 04, 2008, Room 05 4:20 PM Polymers, Environmental-Friendly Coatings, Non Destructive Testing Testing coatings directly on coated parts without destroying any additionally coated samples, polymer-based coatings and environmental-friendly coatings |
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Plastics metallization by detonation spraying |
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Igor Smurov* / Ecole Nationale d'ingénieurs de Saint-Etienne (ENISE), France Vladimir Ulianitsky / Lavrentyev Institute of Hydrodynamics SB RAS, Russia Aleksey Shtertser/ Lavrentyev Institute of Hydrodynamics SB RAS, Russia Sergey Zlobin/ Lavrentyev Institute of Hydrodynamics SB RAS, Russia |
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Metallization of plastics by thermal spraying is studied. The possibility to obtain high adhesion of metal particles to the surface of a wide range of plastic materials is shown. Powders are sprayed with a new generation detonation gun ?Dragon? designed at Larentyev Institute of Hydrodynamics SB RAS. The apparatus is characterized by a high-precision gas supply system and a dosed localized powder feeding system. Computer control provides a flexible programmed readjustment of the detonation gases energy impact on powder particles which is a key factor in precision control of spraying parameters for low-melting point powder materials. It is found that under certain spraying conditions molten particles of a low-melting point material not only do not provoke erosion of plastic material at their high velocity impact on the substrate but strong-bond fusion, sufficient to further form a thick coating, occurs. Aluminium, zinc and tin powders are sprayed on substrates from fibreglass, polyester, fluoroplastic and some other plastics. Load capacity of the obtained coatings reaches 100 kg/cm2. It is shown that on top of a thin layer from a low-melting point powder material high-melting point metals and even ceramics can be deposited. |