Navegando por Assunto "Newton's Law of Cooling"

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Determinação do calor específico de ligas AlCu produzidas em um dispositivo de solidificação unidirecional vertical ascendente
(Universidade Federal do Pará, 2008-11-24) MARTINS, Marcelo Gonçalves; SÁ, Fernando Antonio de; http://lattes.cnpq.br/8275621144223544
The knowledge of the properties of the thermophysics is extremely important to the study of the metallic alloys obtained from the solidification, once this one it is directly related to the heat transfer coefficient at the metal / mold interface. Thus, the researchers group of metallurgy and environment – GAPEMM of Federal University of Pará develops a line of research that proposes to develop techniques and procedures which has as main objective to determine them. On the other side, it is known that there is a significant correlation among process, structure, and properties obtained from a material during solidification. Since the distribution of solute in a metallic alloy occurs in a heterogeneous way. The way the solidification happens and the quantification of the varieties involved in the process has fundamental influence in the properties of the material. The present study used alloys Al-Cu (Al-2%Cu, Al-5%Cu e Al-8%Cu) obtained from a process upward directional solidification, made through one dispositive planned, constructed and calibrated by gapemm. Through these researches, there’s the intention to study the specific heat as it gets away the plate mold as well as the raise of the solute content. To do this, it was used a technique known in the literature as the Newton´s law cooling, which makes it possible through the curves of temperature x time to determine the necessary temperatures that will allow the calculation of the specific heat.