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Title: Dynamic compaction of nickel powder examined by x-ray phase contrast imaging

Abstract

Understanding the shock response of porous, granular materials is important for many scientific applications. In this work, a propagation-based x-ray phase contrast imaging technique was used to examine the shock compaction response of Ni powder (particle size: 30 and 45 µm), encapsulated in PMMA cylinders, in situ and in real time. The propagating shock wave in the PMMA cylinder and the deformation of the Ni powder column were recorded, but the compaction wave in the Ni powder could not be observed due to insufficient penetration of x-ray photons through the sample. The overall shape of the deformed Ni column downstream of the PMMA shock looked qualitatively similar for both particle sizes: it deformed inward and then outward similar to a converging-diverging nozzle, followed by a ‘mushroom’-like structure at the impact face. A preliminary analysis of our data using shock-polar method provided insight into the observed shock and flow deflection angles at the PMMA/Ni interface, and permitted evaluation of the Ni powder EOS used in this work.

Authors:
 [1];  [1];  [1];  [2]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. National Security Technologies, LLC, Los Alamos,NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1565880
Report Number(s):
LA-UR-17-27835
Journal ID: 0094-243X
Grant/Contract Number:  
89233218CNA000001
Resource Type:
Accepted Manuscript
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1979; Journal Issue: 1; Conference: Shock Compression of Condensed Matter - 2017, St. Louis, MO (United States), 9-14 July 2017
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; shock compression; powder compaction; Ni powder; x-ray phase contrast imaging; shock-polar

Citation Formats

Mandal, Anirban, Jensen, Brian J., Aslam, Tariq D., and Iverson, Adam J. Dynamic compaction of nickel powder examined by x-ray phase contrast imaging. United States: N. p., 2018. Web. doi:10.1063/1.5044929.
Mandal, Anirban, Jensen, Brian J., Aslam, Tariq D., & Iverson, Adam J. Dynamic compaction of nickel powder examined by x-ray phase contrast imaging. United States. doi:10.1063/1.5044929.
Mandal, Anirban, Jensen, Brian J., Aslam, Tariq D., and Iverson, Adam J. Tue . "Dynamic compaction of nickel powder examined by x-ray phase contrast imaging". United States. doi:10.1063/1.5044929. https://www.osti.gov/servlets/purl/1565880.
@article{osti_1565880,
title = {Dynamic compaction of nickel powder examined by x-ray phase contrast imaging},
author = {Mandal, Anirban and Jensen, Brian J. and Aslam, Tariq D. and Iverson, Adam J.},
abstractNote = {Understanding the shock response of porous, granular materials is important for many scientific applications. In this work, a propagation-based x-ray phase contrast imaging technique was used to examine the shock compaction response of Ni powder (particle size: 30 and 45 µm), encapsulated in PMMA cylinders, in situ and in real time. The propagating shock wave in the PMMA cylinder and the deformation of the Ni powder column were recorded, but the compaction wave in the Ni powder could not be observed due to insufficient penetration of x-ray photons through the sample. The overall shape of the deformed Ni column downstream of the PMMA shock looked qualitatively similar for both particle sizes: it deformed inward and then outward similar to a converging-diverging nozzle, followed by a ‘mushroom’-like structure at the impact face. A preliminary analysis of our data using shock-polar method provided insight into the observed shock and flow deflection angles at the PMMA/Ni interface, and permitted evaluation of the Ni powder EOS used in this work.},
doi = {10.1063/1.5044929},
journal = {AIP Conference Proceedings},
number = 1,
volume = 1979,
place = {United States},
year = {2018},
month = {7}
}

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Cited by: 2 works
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