Estudo de secções verticais do sistema Cu-Li-Mg por calorimetria diferencial de varrimento

• Autor(a) principal: M. H. Braga
• Data de Publicação: 2001
• Outros Autores: L. F. Malheiros
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: https://hdl.handle.net/10216/67203

The Cu-Li-Mg was, until this moment, been just studied by Melnik et al. These authors had studied the system by XRD at 643 K. The only ternary compound they have found was Cu8Li2Mg15. In the present work weve started by studying the system by means of XRD and SEM/EDS and we were able to confirm the existence of Cu8Li2Mg15. Besides that, it was developed a first assessment that relates our experimental work and the one from Melnik et al. with the Gibbs energies of the phases that constitute the system. As the experimental work was still not enough to assess the ternary at all range of temperatures, specially near liquidus, we have done some measurements on DTA/DSC with samples corresponding to three vertical sections. The results obtained for xLi 0.05 were compared with the assessed vertical section.