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https://hdl.handle.net/10316/113730
Título: | Decorative Chromium Coatings on Polycarbonate Substrate for the Automotive Industry | Autor: | Ponte, Filipa Sharma, Pooja Figueiredo, Nuno Miguel Ferreira, Jorge Carvalho, Sandra |
Palavras-chave: | polycarbonate; chromium coating; plasma etching; sputtering; automotive industry | Data: | 14-Mar-2023 | Editora: | MDPI | Projeto: | This research was supported by the COMPETE 2020, a Portuguese and European Union initiative through the Project POCI-01-0247-FEDER-072607, R&D and production of logos for the automotive industry. This work was supported by the Portuguese Foundation for Science and Technology (FCT) in the framework of Strategic Funding (co-financed via UIDB/00285/2020) and LA/P/0112/2020. | Título da revista, periódico, livro ou evento: | Materials | Volume: | 16 | Número: | 6 | Resumo: | Metal-coated plastic parts are replacing traditional metallic materials in the automotive industry. Sputtering is an alternative technology that is more environmentally friendly than electrolytic coatings. Most metalized plastic parts are coated with a thin metal layer (~100-200 nm). In this work, the challenge is to achieve thicker films without cracking or without other defects, such as pinholes or pores. Chromium coatings with different thicknesses were deposited onto two different substrates, polycarbonate with and without a base coat, using dc magnetron sputtering in an atmosphere of Ar. Firstly, in order to improve the coating adhesion on the polymer surface, a plasma etching treatment was applied. The coatings were characterized for a wide thickness range from 800 nm to 1600 nm. As the thickness of the coatings increased, there was an increase in the specular reflectivity and roughness of the coatings and changes in morphology due to the columnar growth of the film and a progressive increase in thermal stresses. Furthermore, a decrease in the hardness and the number of pinholes was noticed. The maximum thickness achieved without forming buckling defects was 1400 nm. The tape tests confirmed that every deposited coating showed a good interface adhesion to both polymers. | URI: | https://hdl.handle.net/10316/113730 | ISSN: | 1996-1944 | DOI: | 10.3390/ma16062315 | Direitos: | openAccess |
Aparece nas coleções: | FCTUC Eng.Mecânica - Artigos em Revistas Internacionais I&D CEMMPRE - Artigos em Revistas Internacionais |
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Ficheiro | Descrição | Tamanho | Formato | |
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Decorative-Chromium-Coatings-on-Polycarbonate-Substrate-for-the-Automotive-IndustryMaterials.pdf | 7.59 MB | Adobe PDF | Ver/Abrir |
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