Abstract
Crystallization reactions, crystal morphologies and evolutions have been studied in meltspun binary Al-Y and ternary Al-Fe-Y metallic glasses using X-ray diffraction, differential scanning calorimetry, electron microscopy and Moessbauer spectroscopy. The binary samples crystallize in an one-stage or two-stage primary reaction of {alpha} Al phase, followed by polymorphous reactions of different metastable compounds. The ternary glasses devitrify in either polymorphous or eutectic reactions. The ternary crystalline compounds are characteristically a metastable Al{sub 9} (Fe,Y){sub 2} phase with strongly textured columnar morphology, and a tetragonal Al{sub 70}Fe{sub 16}Y{sub 14} phase. The structure of the early stage crystallization products depends on the nature of the short range chemical order structures existing at different temperatures in the melts, which are partly retained in the glass phases. (orig.).
Citation Formats
Li, Q, Johnson, E, Madsen, M B, Johansen, A, and Sarholt-Kristensen, L.
Crystallization of Al-based metallic glasses: Structural aspects.
Denmark: N. p.,
1991.
Web.
Li, Q, Johnson, E, Madsen, M B, Johansen, A, & Sarholt-Kristensen, L.
Crystallization of Al-based metallic glasses: Structural aspects.
Denmark.
Li, Q, Johnson, E, Madsen, M B, Johansen, A, and Sarholt-Kristensen, L.
1991.
"Crystallization of Al-based metallic glasses: Structural aspects."
Denmark.
@misc{etde_10120607,
title = {Crystallization of Al-based metallic glasses: Structural aspects}
author = {Li, Q, Johnson, E, Madsen, M B, Johansen, A, and Sarholt-Kristensen, L}
abstractNote = {Crystallization reactions, crystal morphologies and evolutions have been studied in meltspun binary Al-Y and ternary Al-Fe-Y metallic glasses using X-ray diffraction, differential scanning calorimetry, electron microscopy and Moessbauer spectroscopy. The binary samples crystallize in an one-stage or two-stage primary reaction of {alpha} Al phase, followed by polymorphous reactions of different metastable compounds. The ternary glasses devitrify in either polymorphous or eutectic reactions. The ternary crystalline compounds are characteristically a metastable Al{sub 9} (Fe,Y){sub 2} phase with strongly textured columnar morphology, and a tetragonal Al{sub 70}Fe{sub 16}Y{sub 14} phase. The structure of the early stage crystallization products depends on the nature of the short range chemical order structures existing at different temperatures in the melts, which are partly retained in the glass phases. (orig.).}
place = {Denmark}
year = {1991}
month = {Dec}
}
title = {Crystallization of Al-based metallic glasses: Structural aspects}
author = {Li, Q, Johnson, E, Madsen, M B, Johansen, A, and Sarholt-Kristensen, L}
abstractNote = {Crystallization reactions, crystal morphologies and evolutions have been studied in meltspun binary Al-Y and ternary Al-Fe-Y metallic glasses using X-ray diffraction, differential scanning calorimetry, electron microscopy and Moessbauer spectroscopy. The binary samples crystallize in an one-stage or two-stage primary reaction of {alpha} Al phase, followed by polymorphous reactions of different metastable compounds. The ternary glasses devitrify in either polymorphous or eutectic reactions. The ternary crystalline compounds are characteristically a metastable Al{sub 9} (Fe,Y){sub 2} phase with strongly textured columnar morphology, and a tetragonal Al{sub 70}Fe{sub 16}Y{sub 14} phase. The structure of the early stage crystallization products depends on the nature of the short range chemical order structures existing at different temperatures in the melts, which are partly retained in the glass phases. (orig.).}
place = {Denmark}
year = {1991}
month = {Dec}
}