INVESTIGADORES
RENDTORFF BIRRER Nicolas Maximiliano
artículos
Título:
A short and long range study of mullitezirconiazircon composites
Autor/es:
N. RENDTORFF; M.C. CONCONI; E. AGLIETTI; YAMIL CHAIN; ALBERTO PASQUEVICH; PATRICIA RIVAS; JORGE MARTINEZ; MARIA C. CARACOCHE
Revista:
HYPERFINE INTERACTIONS
Editorial:
SPRINGER
Referencias:
Año: 2010 vol. 198 p. 219 - 228
ISSN:
0304-3843
Resumen:
Abstract In the field of refractory materials, ceramics containing mullitezirconia
are the basis of those most used in the industry of glass and steel. It is known
that the addition of zircon improves the behavior of the refractory used in service.
Knowing that some mullitezirconia composites properties as fracture strength and
the elastic modulus E are associated with the material microstructure integrity, the
eventual thermal decomposition of zircon into zirconia and silica could seriously
alter the material elastic properties. In this paper the phase content of a series
of mullitezirconiazircon (3Al2O3.2SiO2ZrO2ZrSiO4) composites is determined
at atomic level via perturbed angular correlations (PAC) and compared with that
derived from the long range X-ray diffraction technique. PAC results on the asprepared
materials indicate that all nominal zircon is present and that it involves
two types of nanoconfigurations, one of them describing aperiodic regions. The thermomechanical properties already reported for these materials could be related
to the crystalline to aperiodic zircon concentrations ratio they exhibit.