The Early Stages of Solid-State Reactions in Ti/Al Multilayer Films
Keyword(s):
X Ray
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ABSTRACTWe have investigated the solid-state reaction of Ti/Al multilayer films by x-ray diffraction (XRD) and differential scanning calorimetry (DSC), with focus on the early stages of the reaction provided by samples with pair thicknesses in the range 5 - 40 nm. This reaction, which results in formation of TiAl3 with metastable Ll2 structure, can be modeled by a nucleation and growth process on the basis of the Johnson-Mehl-Avrami theory, with a reaction-order parameter n ≈1. These observations indicate the significance of nucleation barriers even at early stages of solid-state reactions, and suggests that the phenomena of phase selection and formation of metastable phases can result from the presence of nucleation barriers.
1991 ◽
Vol 6
(3)
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pp. 499-504
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1996 ◽
Vol 54
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pp. 1020-1021
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2019 ◽
Vol 75
(6)
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pp. 793-805
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1983 ◽
Vol 93
(2)
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pp. 433-440
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1989 ◽
Vol 162
(Part_1)
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pp. 97-107
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