aspectos teóricos e práticos sobre a resistência mecânica de porcelanas theoretical and practical aspects on the mechanical strength of porcelains

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ID: 219927
2004
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Abstract
As propriedades finais de uma porcelana tradicional, incluindo sua resistência mecânica, são conseqüência do processamento cerâmico que lhe deu origem, desde as matérias-primas e suas características, processo de conformação e temperatura, tempo, tipo e atmosfera de queima. Estes fatores determinam a complexidade da microestrutura, a partir do desenvolvimento de fases que promovem. São na sua maioria variáveis de difícil controle, tornando difícil a previsão das propriedades finais e, dentre essas, a resistência mecânica do corpo cerâmico. Desde o século passado, várias teorias surgiram na tentativa de se explicar os fenômenos que governam a resistência mecânica. Algumas dessas foram recentemente revisadas devido à disponibilidade de novas técnicas analíticas. Este trabalho apresenta um overview da literatura sobre resistência mecânica de porcelanas, utilizando trabalhos de vários pesquisadores e acrescendo dados de investigações próprias e recentes sobre o tema.
The properties of traditional porcelain, including its mechanical strength, are a consequence of the ceramic processing that formed the piece, and then, raw materials and their characteristics, forming process, firing atmosphere, time and temperature. These parameters determine the complexities of microstructure and phase development, which are difficult to be controlled and makes almost impossible to predict porcelain final properties. Since the last century, many theories have been developed to explain the strength of porcelain, and some have recently been revised and improved due to the development of new analytical techniques. This work shows an overview on the literature, which comprises new discussions and theories about porcelain strength, including authors´ own investigations.
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Authors S. R. Bragança, C. P. Bergmann
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Journal Zootaxa
Year 2004
DOI
10.1590/S0366-69132004000200012
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132004000200012
Keywords
ceramics civil engineering (general) mechanical strengthengineering (general)

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