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Strongly Driven Crystallization Processes in a Metallic Glass

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.3125429· OSTI ID:952751
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The crystallization of amorphous NiTi thin films was studied in situ using pulsed laser heating in a dynamic transmission electron microscope. A single pulse can crystallize small areas of the film within 2 {micro}s. The crystallized volume fraction and morphology depend strongly on the laser energy, the laser spatial profile, and the heat transport in the film. As compared to slower furnace and continuous wave laser annealing, pulsed laser heating produces a dramatically different microstructure. Higher than expected crystallization rates were observed under pulsed irradiation that do not correlate with kinetic data obtained from the slow-heating crystallization experiments.
Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA
Sponsoring Organization:
USDOE
DOE Contract Number:
W-7405-ENG-48
OSTI ID:
952751
Report Number(s):
LLNL-JRNL-410497
Journal Information:
Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 18 Vol. 94; ISSN APPLAB; ISSN 0003-6951
Country of Publication:
United States
Language:
English

References (13)

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Effect of temperature on the devitrification kinetics of NiTi films journal October 2003

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Related Subjects

36 MATERIALS SCIENCE
ANNEALING
CRYSTALLIZATION
ELECTRON MICROSCOPES
FURNACES
GLASS
HEATING
KINETICS
LASERS
MICROSTRUCTURE
MORPHOLOGY
PULSED IRRADIATION
THIN FILMS
TRANSPORT