Sintering mechanisms of partially stabilized zirconia (TZ3Y) with ZnO and Co3O4 as sintering additives

AUTOR(ES)

Marcomini, R. F.; Arantes, V. L.

FONTE

Cerâmica

DATA DE PUBLICAÇÃO

2021-06

RESUMO

Abstract In this work, the sintering mechanisms of 3 mol% yttria-stabilized zirconia (TZ3Y) and TZ3Y containing 0.3 wt% of ZnO or Co3O4 were analyzed by determining the apparent activation energy of sintering from dilatometry data and observing the evolution of microstructure. Dilatometry test was performed at a heating rate ranging from 5 to 20 °C/min from room temperature up to 1500 °C. The main mechanism of each sintering additive for the studied samples was revealed from the variation of the sintering activation energy as a function of the relative density and scanning electron microscopy images. The mechanism for the ZnO additive was the formation of a liquid phase at the beginning of the sintering process, while the Co3O4 additive acted via solid-state sintering by increasing cation diffusivity.

Documentos Relacionados

• Microstructural and Electrical Features of Yttrium Stabilised Zirconia with ZnO as Sintering Additive
• Investigação de interações hiperfinas em ZnO e  Zn(1-X) Co(x)O pela técnica de correlação angular y-y perturbada
• Análise teórica da interação de CO, CO2 e NH3 com ZnO
• PROPRIEDADES ESTRUTURAIS E MAGNÉTICAS DE NANOPARTÍCULAS DE Co3O4 COM A ADIÇÃO DE AGENTES QUELANTES.
• Nanoparticles of Fe2O3 and Co3O4 as Efficient Electrocatalysts for Oxygen Reduction Reaction in Acid Medium