A Thermal and Nanomechanical Study of Molecular Crystals as Versatile Mocks for Pentaerythritol Tetranitrate
| Autor: | John D. Yeager, David F. Bahr, Zakary R. Wilde, Alexandra C. Burch |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Yield (engineering)
Materials science Explosive material nanoindentation General Chemical Engineering Modulus Pentaerythritol tetranitrate 02 engineering and technology 010402 general chemistry 01 natural sciences Detonator Inorganic Chemistry chemistry.chemical_compound Indentation mock lcsh:QD901-999 General Materials Science Composite material Elastic modulus Nanoindentation explosive 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences chemistry fracture lcsh:Crystallography 0210 nano-technology |
| Zdroj: | Crystals Volume 10 Issue 2 Crystals, Vol 10, Iss 2, p 126 (2020) |
| ISSN: | 2073-4352 |
| DOI: | 10.3390/cryst10020126 |
| Popis: | Pentaerythritol tetranitrate (PETN) is a commonly used high explosive (HE) in detonators. Often, surrogate or &ldquo mock&rdquo materials are used in place of HE for mechanical tests, proofing out equipment, or developing new diagnostics. However, there is no commonly accepted mock for PETN. A good mock should match at least one physical property of the target material, and ideally mimic multiple thermal and mechanical properties. Here, we investigate several molecular crystals to evaluate their efficacy in mocking PETN density, melting point, elastic modulus, hardness, plastic deformation, and fracture behavior. Materials were tested with a combination of calorimetry and nanoindentation. Two materials, 2,4,6-trifluorobenzoic acid (246 TFBA) and mesoerythritol, were downselected for detailed indentation study after the initial round of screening experiments, both were found to mimic PETN mechanical behavior quite well, 246 TFBA closer to PETN in most properties (hardness, modulus, and density) than erythritol, but erythritol having advantages in relative cost and matching the onset of yield. Depending on the desired implementation of the mock, one material may be preferred over the other, but both have potential as generic mocks for PETN. Nanoindentation is demonstrated as a versatile tool to provide rapid screening of these materials&rsquo mechanical properties. |
| Databáze: | OpenAIRE |
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