Anisotropy in high-temperature deformation in unidirectionally solidified eutectic Al2O3-YAG single crystals

High-temperature deformation behavior in unidirectionally solidified eutectic Al2O3-Y3Al5O12 single crystals for a specimen with a compressive axis inclined by 0, 45 or 90 deg to the solidification direction was examined by uniaxial compression testing in argon flow at temperatures between 1773 and...

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Bibliographic Details
Published in:Scripta materialia 2001-10, Vol.45 (8), p.957-963
Main Authors: YOSHIDA, Hidehiro, NAKAMURA, Atsutomo, SAKUMA, Taketo, NAKAGAWA, Naruhito, WAKU, Yoshiharu
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
Deformation and plasticity (including yield, ductility, and superplasticity)
Exact sciences and technology
Mechanical and acoustical properties of condensed matter
Mechanical properties of solids
Physics
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Summary:High-temperature deformation behavior in unidirectionally solidified eutectic Al2O3-Y3Al5O12 single crystals for a specimen with a compressive axis inclined by 0, 45 or 90 deg to the solidification direction was examined by uniaxial compression testing in argon flow at temperatures between 1773 and 1973 K. High-temperature yield stress at 1873 K under an initial strain rate of 1 x 10 exp -4/s in a 0-deg specimen is 430 Mpa, which is much higher than that in sintered Al2O3-YAG composite with the same composition. (CSA)
ISSN:1359-6462
1872-8456
DOI:10.1016/s1359-6462(01)01118-6