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Fusão de metais não-ferrosos usando irradiação de micro-ondas

Authors: Pechoto, Luís Otávio Pontes;

Fusão de metais não-ferrosos usando irradiação de micro-ondas

Abstract

A fundição de metais não ferrosos é uma das técnicas industriais mais utilizadas atualmente para a produção de peças e componentes mecânicos, empregando diferentes formas de aquecimento por energia elétrica ou por combustão. Todavia a fundição de metais por meio de irradiação de micro-ondas é um tema relativamente recente e que vem ganhando destaque científico e tecnológico. O propósito deste trabalho é investigar a aplicação de micro-ondas para a fusão de metais não-ferrosos como estanho, chumbo, alumínio e cobre. Como metais em volumes massivos não absorvem micro-ondas foi empregado um anel feito de carboneto de silício como susceptor e isolado termicamente com uma manta de fibra cerâmica. Este sistema simples foi capaz de gerar a energia térmica necessária para a fusão dentro de um forno de micro-ondas comum para uso doméstico. Para análise do processamento foram processadas cargas de 50 e 100 gramas dos metais inseridos em cadinho de grafite, sendo obtidas as curvas de aquecimento durante o aquecimento e fusão dos materiais. Os resultados obtidos provam ser viável a fusão de metais não-ferrosos em tempos similares a outros métodos de aquecimento, sendo, portanto, uma técnica alternativa e simples para a fundição para metais em pequena escala.

The melting of non-ferrous metals is one of the most used industrial techniques today to produce mechanical parts and components, employing different forms of heating by electrical energy or by combustion. However, the melting of metals by means of microwave irradiation is a relatively recent topic that has been gaining scientific and technological prominence. The purpose of this work is to investigate the application of microwaves for melting non-ferrous metals such as tin, lead, aluminum and copper. As metals in massive volumes do not absorb microwaves, a ring made of silicon carbide was used as a susceptor and thermally insulated with a ceramic fiber blanket. This simple system was able to generate the thermal energy needed for melting inside a common microwave oven for domestic use. For analysis of the processing, loads of 50 and 100 grams of the metals inserted in a graphite crucible were processed, and the heating curves during heating and melting of the materials were obtained. The results obtained prove to be viable the melting of non-ferrous metals in times similar to other heating methods, being, therefore, an alternative and simple technique for melting metals on a small scale.

Pós-graduação em Engenharia Mecânica - FEIS

Country
Brazil
Keywords

Fundição de metais não-ferrosos, Metal casting, Refratários, Refractories, Curvas de aquecimento, Heating curves, Micro-ondas, Susceptor, Microwave

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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