Drastic softening of Pd nanoparticles induced by hydrogen cycling
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arXiv
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| Autori principali: | , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| Soggetti: | |
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| _version_ | 1866909568756350976 |
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| author | Zimmerman, Jonathan Vrellou, Maria Wagner, Stefan Pundt, Astrid Kirchlechner, Christoph Rabkin, Eugen |
| author_facet | Zimmerman, Jonathan Vrellou, Maria Wagner, Stefan Pundt, Astrid Kirchlechner, Christoph Rabkin, Eugen |
| contents | Single crystalline faceted Pd nanoparticles attached to a sapphire substrate were fabricated employing the solid state dewetting method. The as-dewetted nanoparticles tested in compression exhibited all features of dislocation nucleation-controlled plasticity, including the size effect on strength and ultrahigh compressive strength reaching up to 11 GPa. Hydrogen cycling of as-dewetted Pd nanoparticles resulted in their drastic softening and in change of the deformation mode. This softening effect was correlated with the high density of glissile dislocations observed in the cycled particles. This work demonstrates that the nanomechanical behavior of hydride-forming metals can be manipulated by hydrogen cycling. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_04776 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Drastic softening of Pd nanoparticles induced by hydrogen cycling Zimmerman, Jonathan Vrellou, Maria Wagner, Stefan Pundt, Astrid Kirchlechner, Christoph Rabkin, Eugen Materials Science Single crystalline faceted Pd nanoparticles attached to a sapphire substrate were fabricated employing the solid state dewetting method. The as-dewetted nanoparticles tested in compression exhibited all features of dislocation nucleation-controlled plasticity, including the size effect on strength and ultrahigh compressive strength reaching up to 11 GPa. Hydrogen cycling of as-dewetted Pd nanoparticles resulted in their drastic softening and in change of the deformation mode. This softening effect was correlated with the high density of glissile dislocations observed in the cycled particles. This work demonstrates that the nanomechanical behavior of hydride-forming metals can be manipulated by hydrogen cycling. |
| title | Drastic softening of Pd nanoparticles induced by hydrogen cycling |
| topic | Materials Science |
| url | https://arxiv.org/abs/2504.04776 |