Fracture toughness of Si3N4 processed by gas pressure sintering and hot pressing

AUTOR(ES)

Rocha, Cláudio V., Costa, Célio A.

FONTE

Materials Research

DATA DE PUBLICAÇÃO

2006-06

RESUMO

This present work evaluates the influence of microstructure on the fracture toughness of two types of silicon nitride. The two microstructural types of silicon nitride were processed using the gas pressure sintering (GPS) and hot pressing (HP) pathways. The fracture toughness was measured using the Single Edge V-Notch Beam (SEVNB) and Chevron Notch Beam (CNB) methods. The results from both methods for the two forms were in close agreement (with a maximum variation of 5.8%); the K Ic of the material processed by HP was 35% higher than that of GPS and the grain length had a direct influence on the fracture toughness.

Documentos Relacionados

• A contribution of X ray diffraction analysis in the determination of creep of Si3N4 ceramics
• Si3N4 ceramic cutting tool sintered with CeO2 and Al2O3 additives with AlCrN coating
• Si3N4 ceramics sintered with Y2O3/SiO2 and R2O3(ss)/SiO2: a comparative study of the processing and properties
• Anisotropia no comportamento à fluência de cerâmicas à base de Si3N4 prensadas à quente
• The effects of mechanical alloying on the extrusion process of AA 6061 alloy reinforced with Si3N4