Laser shock compression induced crystallization of Ce3Al metallic glass

Laser shock compression studies on Ce3Al metallic glass performed using a 3 J Nd:YAG laser indicate shock-induced crystallization, evidenced by the presence of a two-wave/stepped particle velocity profile and structural changes observed via X-ray Diffraction (XRD) analysis of recovered material. A d...

Full description

Saved in:
Bibliographic Details
Published in:Journal of applied physics 2018-07, Vol.124 (3)
Main Authors: Bryant, Alex W., Scripka, David, Alamgir, Faisal M., Thadhani, Naresh N.
Format: Article
Language:English
Subjects:
Amorphous materials
Applied physics
Crystallization
Densification
Diffraction
Diffraction patterns
Elastic deformation
Elastic limit
Foils
Lasers
Metallic glasses
Neodymium lasers
Nickel
Plastic deformation
Polymethyl methacrylate
Preferred orientation
Semiconductor lasers
Velocity distribution
Wave diffraction
X-ray diffraction
YAG lasers
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Laser shock compression studies on Ce3Al metallic glass performed using a 3 J Nd:YAG laser indicate shock-induced crystallization, evidenced by the presence of a two-wave/stepped particle velocity profile and structural changes observed via X-ray Diffraction (XRD) analysis of recovered material. A direct shock-compression setup was designed with 25 μm thick Ni driver foil, 40 μm thick Ce3Al metallic glass ribbon, and 3 mm thick poly(methyl methacrylate) (PMMA) backer window for use with input laser energies varying from 100 to 2000 mJ and corresponding estimated peak pressures of 1.4 to 4.1 GPa in Ce3Al. At shock pressures below ∼1.8 GPa (300 mJ laser input energy), samples were recovered showing no obvious deformation or structural changes evidenced via XRD analysis. At higher laser energies and shock pressures above the elastic limit, samples were recovered showing visible deformation and crystallization evidenced by Rietveld analysis of diffraction patterns. The corresponding velocity profiles also showed a stepped wave structure, increasing in magnitude with energy. The overall results reveal possible densification of the glass due to delocalization of 4f electrons in Ce at lower laser shock pressures and increased crystallization with preferred orientation and distortion of the nanocrystals at higher shock compression conditions.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.5030663