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Friction and wear behaviours of Ti(C,O,N) dark decorative coatings

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Detalhes bibliográficos
Resumo:Reactive magnetron sputtering was used to obtain dark Ti(C,O,N) decorative coatings onto high speed steel. From a crystallographic point of view, depending by the amount of (N+O) mixture, the obtained films could be divided in two major regions: the first one with a predominant fcc crystallographic structure (for low amounts of (N+O)), and the second one containing films with amorphous structures. The best results for friction coefficient and wear rates (the minimum values) were registered for samples prepared in the beginning of the amorphous region. These two tribological parameters are mainly influenced by the carbon content in the films. Taking into account the practical goal of these kinds of films, the pure black films were obtained for higher amount of (N+O) mixture. Also for these amorphous darkest films reached in oxygen and nitrogen, the tribological properties are acceptable and the adherence reaches the maximum value.
Autores principais:Munteanu, D.
Outros Autores:Gabor, C.; Constantin, D. G.; Varga, B.; Adochite, R.; Andrei, O. C.; Chappé, J. M.; Cunha, L.; Moura, C.; Vaz, F.
Assunto:Decorative coating Composition Friction Wear
Ano:2011
País:Portugal
Tipo de documento:artigo
Tipo de acesso:acesso aberto
Instituição associada:Universidade do Minho
Idioma:inglês
Origem:RepositóriUM - Universidade do Minho
Descrição
Resumo:Reactive magnetron sputtering was used to obtain dark Ti(C,O,N) decorative coatings onto high speed steel. From a crystallographic point of view, depending by the amount of (N+O) mixture, the obtained films could be divided in two major regions: the first one with a predominant fcc crystallographic structure (for low amounts of (N+O)), and the second one containing films with amorphous structures. The best results for friction coefficient and wear rates (the minimum values) were registered for samples prepared in the beginning of the amorphous region. These two tribological parameters are mainly influenced by the carbon content in the films. Taking into account the practical goal of these kinds of films, the pure black films were obtained for higher amount of (N+O) mixture. Also for these amorphous darkest films reached in oxygen and nitrogen, the tribological properties are acceptable and the adherence reaches the maximum value.