Scanning AC nanocalorimetry study of Zr/B reactive multilayers

The reaction of Zr/B multilayers with a 50 nm modulation period has been studied using scanning AC nanocalorimetry at a heating rate of approximately 103 K/s. We describe a data reduction algorithm to determine the rate of heat released from the multilayer. Two different exothermic peaks are identif...

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Bibliographic Details
Published in:Journal of applied physics 2013-12, Vol.114 (21)
Main Authors: Lee, Dongwoo, Sim, Gi-Dong, Xiao, Kechao, Seok Choi, Yong, Vlassak, Joost J.
Format: Article
Language:English
Subjects:
Amorphization
Applied physics
Crystallization
Data reduction
Exothermic reactions
Heating rate
High temperature
Metallic glasses
Multilayers
Scanning
Zirconium base alloys
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Summary:The reaction of Zr/B multilayers with a 50 nm modulation period has been studied using scanning AC nanocalorimetry at a heating rate of approximately 103 K/s. We describe a data reduction algorithm to determine the rate of heat released from the multilayer. Two different exothermic peaks are identified in the nanocalorimetry signal: a shallow peak at low temperature (200–650 °C) and a sharp peak at elevated temperature (650–800 °C). TEM observation shows that the first peak corresponds to heterogeneous inter-diffusion and amorphization of Zr and B while the second peak is due to the crystallization of the amorphous Zr/B alloy to form ZrB2.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4833572