De nanopartículas a nanocamada compacta : recobrimento de partículas em forma de pó pelo processo de PVD

Detalhes bibliográficos
Ano de defesa: 2020
Autor(a) principal: Lisbôa, Allan de Moraes
Orientador(a): Feil, Adriano Friedrich
Banca de defesa: Não Informado pela instituição
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Pontifícia Universidade Católica do Rio Grande do Sul
Programa de Pós-Graduação: Programa de Pós-Graduação em Engenharia e Tecnologia de Materiais
Departamento: Escola Politécnica
País: Brasil
Palavras-chave em Português:
Palavras-chave em Inglês:
Área do conhecimento CNPq:
Link de acesso: http://tede2.pucrs.br/tede2/handle/tede/9450
Resumo: Nanostructured coatings have become a subject of great interest in the industry, due to the possibilities of obtaining materials with unique physicochemical properties. This increment of properties gives improvements in features and functions such as electronics, catalytic, chemical, magnetic, mechanical, etc. The coating of flat surfaces by the magneto sputtering technique is quite common in the industry - glass coatings and metallic materials - but the use of this technique for surface coating of dust particles is still new. The present work seeks from the knowledge of deposition (PVD), to cover polymethylmethacrylate (PMMA) microspheres with a silver nanometer layer. The thickness of this coating ranged from nanoparticles on the dust surface (welldistributed island formation) to the formation of a homogeneous compact nanolayer. Because it is a process that uses a physical deposition route, the process is clean, reproductive and inexpensive, making it possible to be applied in the most varied branches of industry. Silver layers on PMMA microspheres (PMMA-Ag) were produced and characterized by the following techniques: UV-Vis, RBS, FEG and TEM.