Effect of isothermal sintering time on the properties of the ceramic composite ZrO2-Al2O3

Autor(es)

Santos, C. ; Teixeira, L. H. P. ; Daguano, J. K. M. F. ; Strecker, K. ; Elias, C. N. ; Salgado, L ; Filho, FA

• Tipo de documento: Artigo Científico
• Fonte: Materials Science Forum; v. 530-531, p. 2-pg., 2006-01-01.

Resumo

In this work the influence of isothermal sintering time on the microstructural development of ZrO2-Al2O3 composite was studied. Powder mixture of ZrO2 containing 20 wt% Al2O3 was prepared by milling, compaction and sintering at 1600 degrees C, in air. The isothermal sintering time at 1600 degrees C was varied between 0 and 1440 min. The sintered samples were characterized in terms of phase composition and relative density. Their microstructures were characterized by grain size distributions and average grain size. These results were evaluated using the classic grain growth equation as a function of time, determining the grain growth exponent of these materials. Furthermore, the microstructural aspects were related to the mechanical properties (Vicker's hardness and fracture toughness) of these composites. (AU)

• Processo FAPESP: 04/04386-1 - Desenvolvimento e caracterização de pilares cerâmicos biocompatíveis à base de compósitos Zr02-Al2O3
• Beneficiário: Claudinei dos Santos
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores
• Processo FAPESP: 04/13149-3 - Desenvolvimento e caracterizacao de compositos zro2-ai2o3 visando aplicacao como componente protetico.
• Beneficiário: Luis Henrique Perdao Teixeira
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 05/51485-8 - Avaliação da citotoxicidade de biocerâmicas
• Beneficiário: Juliana Kelmy Macário Barboza Daguano
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica