High temperature mechanical properties of Al{sub 2}O{sub 3}/ZrO{sub 2}(Y{sub 2}O{sub 3}) fibers

Conference · Sun Oct 01 00:00:00 EDT 1995

OSTI ID:100533

Sayir, A ^[1]; Farmer, S C ^[2]; Dickerson, P O; Yun, H M ^[3]

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1. Case Western Reserve Univ., Cleveland, OH (United States)
2. National Aeronautics and Space Administration, Cleveland, OH (United States). Lewis Research Center
3. Cleveland State Univ., OH (United States)

In-situ composite fibers produced by directional solidification of two phase oxide eutectics are one means of producing fibers with good strength and higher creep resistance than single crystal fibers. In this work, directionally solidified alumina-yttria stabilized zirconia eutectic fibers have been grown by the laser heated float zone (LHFZ) method at NASA Lewis. The average tensile strength of the alumina-zirconia (60.8 m/o Al{sub 2}O{sub 3}; 39.2 m/o ZrO{sub 2} (9.5 m/o Y{sub 2}O{sub 3})) eutectic fibers was 1.2 GPa at room temperature. The high temperature tensile strength and creep resistance of the eutectic fiber were determined and compared to single crystal Al{sub 2}O{sub 3}.

• OSTI ID: 100533
• Report Number(s): CONF-941144--; ISBN 1-55899-266-9
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
CARBON DIOXIDE LASERS
COMPOSITE MATERIALS
CREEP
EUTECTICS
FABRICATION
FRACTURE PROPERTIES
MECHANICAL PROPERTIES
MELTING
SCANNING ELECTRON MICROSCOPY
TEMPERATURE DEPENDENCE
TENSILE PROPERTIES
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
YTTRIUM OXIDES
ZIRCONIUM OXIDES