Mechanical properties of cordierite-based composites obtained by sol-gel techniques

Conference · Tue Dec 31 04:00:00 EST 1996

OSTI ID:530704

Pinero, C; Barrera-Solano,; Esquivias, L ^[1]

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1. Universidad de Cadiz (Spain); and others

Glass-ceramic matrices of the composition 5SiO{sub 2} x 2Al{sub 2}O{sub 3} x 2MgO x (xTiO{sub 2}) (x= 7 and 15 wt %) were made by a sol-gel process to obtain highly homogeneous cordierite/Al{sub 2}O{sub 3} and cordierite/ZrO{sub 2} composites. The volume fractions of the reinforcing phases ranged from 0 to 0.6, and sintering was achieved by hot-pressing at temperatures between 900{degrees}C and 1000{degrees}C. The mechanical behavior and thermal properties of these composites were studied as functions of the volume fraction of the inclusions and the sintering temperature. The fracture mechanism will be discussed from observed changes on Young`s modulus and toughness evaluated through three-point bending tests and indentation techniques.

• OSTI ID: 530704
• Report Number(s): CONF-9604124--
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
COMPOSITE MATERIALS
FRACTURE PROPERTIES
HOT PRESSING
MAGNESIUM OXIDES
SILICON OXIDES
SINTERING
SOL-GEL PROCESS
TEMPERATURE RANGE 1000-4000 K
TITANIUM OXIDES
YOUNG MODULUS