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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2508.01484 |
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| _version_ | 1866916945672011776 |
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| author | Abere, Michael J Kotula, Paul G. Paras, Jonathan S. Adams, David P. |
| author_facet | Abere, Michael J Kotula, Paul G. Paras, Jonathan S. Adams, David P. |
| contents | The sputter deposition of alternating layers of Ni(V) and Al forms a reactive multilayer known to undergo self-propagating formation reactions when ignited. The sequential deposition process leads to nm-scale premixing of reactants at each included interface which ultimately affects multilayer exothermicity. This work performs the direct measurement of a disordered face-centered cubic (FCC) solid solution premixed phase at the interfaces of Ni(V)/Al multilayers via scanning transmission electron microscopy. The crystallinity of the observed phase differs from previously reported a priori predictions of an amorphous interlayer. The disordered FCC phase retains its symmetry after annealing for 16 h at 135 C, but the lattice parameter shifts consistent with an Al-rich composition. The existence of a crystalline premix in Ni(V)/Al is attributed to the electronic contribution to the entropy of crystallization. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_01484 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Experimental evidence of disordered crystalline premixing in sputter-deposited Ni(V)/Al multilayers Abere, Michael J Kotula, Paul G. Paras, Jonathan S. Adams, David P. Materials Science The sputter deposition of alternating layers of Ni(V) and Al forms a reactive multilayer known to undergo self-propagating formation reactions when ignited. The sequential deposition process leads to nm-scale premixing of reactants at each included interface which ultimately affects multilayer exothermicity. This work performs the direct measurement of a disordered face-centered cubic (FCC) solid solution premixed phase at the interfaces of Ni(V)/Al multilayers via scanning transmission electron microscopy. The crystallinity of the observed phase differs from previously reported a priori predictions of an amorphous interlayer. The disordered FCC phase retains its symmetry after annealing for 16 h at 135 C, but the lattice parameter shifts consistent with an Al-rich composition. The existence of a crystalline premix in Ni(V)/Al is attributed to the electronic contribution to the entropy of crystallization. |
| title | Experimental evidence of disordered crystalline premixing in sputter-deposited Ni(V)/Al multilayers |
| topic | Materials Science |
| url | https://arxiv.org/abs/2508.01484 |