Grain-Growth Stagnation from Vacancy-Diffusion-Limited Disconnection Climb
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arXiv
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| Main Authors: | , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866915740553052160 |
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| author | Punke, Maik Milor, Abel H. G. Salvalaglio, Marco |
| author_facet | Punke, Maik Milor, Abel H. G. Salvalaglio, Marco |
| contents | Grain growth in polycrystals typically stagnates at long times. We identify disconnection climb, limited by vacancy diffusion, as a fundamental microscopic mechanism underlying this behavior. Using a phase-field crystal framework extended to model vacancy diffusion, we resolve grain-boundary migration on diffusive time scales and show that disconnection climb rates correlate with the characteristic grain size at which growth arrests. These results link vacancy transport, disconnection dynamics, and microstructural evolution, establishing vacancy diffusion as a key governing factor. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2601_13965 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Grain-Growth Stagnation from Vacancy-Diffusion-Limited Disconnection Climb Punke, Maik Milor, Abel H. G. Salvalaglio, Marco Materials Science Grain growth in polycrystals typically stagnates at long times. We identify disconnection climb, limited by vacancy diffusion, as a fundamental microscopic mechanism underlying this behavior. Using a phase-field crystal framework extended to model vacancy diffusion, we resolve grain-boundary migration on diffusive time scales and show that disconnection climb rates correlate with the characteristic grain size at which growth arrests. These results link vacancy transport, disconnection dynamics, and microstructural evolution, establishing vacancy diffusion as a key governing factor. |
| title | Grain-Growth Stagnation from Vacancy-Diffusion-Limited Disconnection Climb |
| topic | Materials Science |
| url | https://arxiv.org/abs/2601.13965 |