Coefficient of Thermal Expansion during Ratchet Growth of TATB Compactions
Abstract
Abstract Triamino trinitrobenzene (TATB) is an insensitive high explosive, meaning that it is quite immune from accidental detonation and only performs in appropriately engineered configurations. While this is advantageous for applications, the TATB crystal is graphitic and possesses significant thermal and mechanical anisotropy. Compactions of TATB crystals, with or without binder, have been shown to have oriented TATB crystals that relate to the pressing geometry and process, and this TATB texture necessarily imparts microscale and macroscale anisotropy to the compaction. By a mechanism not fully understood, thermal cycling results in irreversible volume expansion (also called ratchet growth) of the compaction likely by creating stress points on the microscale. Changes in density caused by thermal cycling can certainly effect the explosive performance. Our past characterization of the ratchet growth phenomenon has focused on the magnitude of the irreversible strain as measured before and after a thermal cycle. In the work presented here, we analyze the evolving thermal expansion behavior during the ascending and descending temperature ramps, providing further insight into the material changes taking place during the ratchet growth phenomenon.
- Publication Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1774450
- Alternate Identifier(s):
- OSTI ID: 1786443
- Report Number(s):
- LA-UR-20-24950
Journal ID: ISSN 0721-3115
- Grant/Contract Number:
- 89233218CNA000001
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Propellants, Explosives, Pyrotechnics
- Additional Journal Information:
- Journal Volume: 45; Journal Issue: 12; Journal ID: ISSN 0721-3115
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE; TATB; thermal expansion; ratchet growth; anisotropy; TMA
Citation Formats
Thompson, Darla Graff, Woznick, Caitlin Savanna, DeLuca, Racci, and Scott, Sidney John. Coefficient of Thermal Expansion during Ratchet Growth of TATB Compactions. United States: N. p., 2020.
Web. doi:10.1002/prep.202000175.
Thompson, Darla Graff, Woznick, Caitlin Savanna, DeLuca, Racci, & Scott, Sidney John. Coefficient of Thermal Expansion during Ratchet Growth of TATB Compactions. United States. https://doi.org/10.1002/prep.202000175
Thompson, Darla Graff, Woznick, Caitlin Savanna, DeLuca, Racci, and Scott, Sidney John. Thu .
"Coefficient of Thermal Expansion during Ratchet Growth of TATB Compactions". United States. https://doi.org/10.1002/prep.202000175. https://www.osti.gov/servlets/purl/1774450.
@article{osti_1774450,
title = {Coefficient of Thermal Expansion during Ratchet Growth of TATB Compactions},
author = {Thompson, Darla Graff and Woznick, Caitlin Savanna and DeLuca, Racci and Scott, Sidney John},
abstractNote = {Abstract Triamino trinitrobenzene (TATB) is an insensitive high explosive, meaning that it is quite immune from accidental detonation and only performs in appropriately engineered configurations. While this is advantageous for applications, the TATB crystal is graphitic and possesses significant thermal and mechanical anisotropy. Compactions of TATB crystals, with or without binder, have been shown to have oriented TATB crystals that relate to the pressing geometry and process, and this TATB texture necessarily imparts microscale and macroscale anisotropy to the compaction. By a mechanism not fully understood, thermal cycling results in irreversible volume expansion (also called ratchet growth) of the compaction likely by creating stress points on the microscale. Changes in density caused by thermal cycling can certainly effect the explosive performance. Our past characterization of the ratchet growth phenomenon has focused on the magnitude of the irreversible strain as measured before and after a thermal cycle. In the work presented here, we analyze the evolving thermal expansion behavior during the ascending and descending temperature ramps, providing further insight into the material changes taking place during the ratchet growth phenomenon.},
doi = {10.1002/prep.202000175},
journal = {Propellants, Explosives, Pyrotechnics},
number = 12,
volume = 45,
place = {United States},
year = {Thu Nov 05 00:00:00 EST 2020},
month = {Thu Nov 05 00:00:00 EST 2020}
}
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Works referenced in this record:
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