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|Type:||Artigo de periódico|
|Title:||Fracture toughness and microstructure degradation of Y-TZP in aqueous physiological environment|
|Abstract:||The present work aims at the study of possible time-dependent changes on the fracture toughness and microstructure of two Y-TZP ceramics with different yttria contents, when immersed in Ringer's solution. The effects of yttria content, sintering ti me and temperature a nd immersion time a nd temperature on the tetragon a I phase content and microstructure of these ceramics were studied, using X-ray diffraction (XRD) analysis and scanning electron microscope analysis (SEM) of the sample surface. Also, their fracture tough ness was measured before and after ageing in Ringer's solution using the Vickers indentation technique. The set of experiments involved in th is study was planned using a two-level-four-factor factorial design, and the results were analysed using the Yates algorithm. Among the main variables, the yttria content showed the greatest effect on the fracture toughness reduction of the samples studied, the sa me applying to the immersion temperature on what concerns the increase in the microstructure degradation of the samples after aging in Ringer's solution.|
|Editor:||Chapman Hall Ltd|
|Citation:||Journal Of Materials Science-materials In Medicine. Chapman Hall Ltd, v. 7, n. 6, n. 367, n. 369, 1996.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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