TY - JOUR
T1 - Microstructure of Al2O3/ZrO2 eutectic fibers grown by the micro-pulling down method
AU - Lee, Jong Ho
AU - Yoshikawa, Akira
AU - Durbin, Stephen D.
AU - Ho Yoon, Dae
AU - Fukuda, Tsuguo
AU - Waku, Yoshiharu
N1 - Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2001/2
Y1 - 2001/2
N2 - The micro-pulling down method has been applied to grow Al2O3/ZrO2 eutectic fibers and to investigate their microstructural properties as a function of solidification rate. Al2O3/ZrO2 eutectic fibers 0.2 to approximately 2 mm in diameter and 500 mm in length have been grown with a pulling rate of 0.1 to approximately 15 mm/min. The eutectic microstructures changed as a function of pulling rate from rod shape to cellular shape containing some thin lamellae. Typical lamellar thickness decreased from about 380 to 110 nm as the pulling rate increased from 1 to 15 mm/min. The interlamellar spacing, λ fits the inverse-square-root dependence on the pulling rate, ν according to λ = 1×ν-1/2, where λ has the dimension of μm and ν is in μ/s. Hardness value reached 13.1 GPa for fibers grown at a pulling rate of 15 mm/min and tensile strength of 900 MPa was achieved at a pulling rate of 10 mm/min. The hardness also increased as the interlamellar spacing decreased.
AB - The micro-pulling down method has been applied to grow Al2O3/ZrO2 eutectic fibers and to investigate their microstructural properties as a function of solidification rate. Al2O3/ZrO2 eutectic fibers 0.2 to approximately 2 mm in diameter and 500 mm in length have been grown with a pulling rate of 0.1 to approximately 15 mm/min. The eutectic microstructures changed as a function of pulling rate from rod shape to cellular shape containing some thin lamellae. Typical lamellar thickness decreased from about 380 to 110 nm as the pulling rate increased from 1 to 15 mm/min. The interlamellar spacing, λ fits the inverse-square-root dependence on the pulling rate, ν according to λ = 1×ν-1/2, where λ has the dimension of μm and ν is in μ/s. Hardness value reached 13.1 GPa for fibers grown at a pulling rate of 15 mm/min and tensile strength of 900 MPa was achieved at a pulling rate of 10 mm/min. The hardness also increased as the interlamellar spacing decreased.
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U2 - 10.1016/S0022-0248(00)00998-2
DO - 10.1016/S0022-0248(00)00998-2
M3 - Article
AN - SCOPUS:0035250759
VL - 222
SP - 791
EP - 796
JO - Journal of Crystal Growth
JF - Journal of Crystal Growth
SN - 0022-0248
IS - 4
ER -