INVESTIGADORES
CAMERUCCI Maria andrea
artículos
Título:
Mechanical behavior of cordierite and cordierite-mullite materials evaluated by indentation techniques
Autor/es:
CAMERUCCI, M.A; URRETAVIZCAYA, G.; CAVALIERI A.L
Revista:
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Editorial:
ELSEVIER SCI LTD
Referencias:
Año: 2001 vol. 21 p. 1195 - 1204
ISSN:
0955-2219
Resumen:
Commercially available cordierite and mullite powders were used to
obtain cordierite and composite materials with mullite content up to 65
wt.% by attrition milling, uniaxial pressing and sintering. Cordierite
powders were the coarse, medium and fine single granulometric fractions
and the binary mixtures of them with 30, 50 and 70 wt.% of the smaller
component. Mullite powder employed in composites was the 7 h-attrition
milled one. The Vickers hardness (HV) and fracture toughness (KIC) were measured by Vickers indentation techniques. The Knoop hardness (HK) and Young's modulus (EK)
were estimated by Knoop indentation method. Fracture surfaces of
sintered materials were analyzed using a scanning electron microscope
(SEM). The indentation load to determinate the fracture parameters was
previously determined. The influence of the porosity, increasing
mullite and glassy phase contents and grain size on the mechanical
parameters were analyzed and a fracture mechanism was proposed.