2019
DOI: 10.1016/j.scriptamat.2019.04.024
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Plastic deformation induced hexagonal-close-packed nickel nano-grains

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Cited by 22 publications
(9 citation statements)
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“…Some novel transformations of crystal structure may take place in the material. Formation of hexagonal-close-packed Ni in grains smaller than 17 nm was found in pure Ni prepared by SMGT, which is contrary to the general knowledge that nickel has a stable face-cube-centered lattice without any phase transition at elevated temperatures and under high pressure up to 200 GPa. Although the phase transformation mechanism remains to be explored, similar phase transformations with the same underlying mechanism are expected in other metals and alloys.…”
Section: Perspectivecontrasting
confidence: 92%
“…Some novel transformations of crystal structure may take place in the material. Formation of hexagonal-close-packed Ni in grains smaller than 17 nm was found in pure Ni prepared by SMGT, which is contrary to the general knowledge that nickel has a stable face-cube-centered lattice without any phase transition at elevated temperatures and under high pressure up to 200 GPa. Although the phase transformation mechanism remains to be explored, similar phase transformations with the same underlying mechanism are expected in other metals and alloys.…”
Section: Perspectivecontrasting
confidence: 92%
“…Stable crystalline solids can transform into metastable states under certain conditions. The most spectacular example of this process is the transition of graphite, a more stable form of carbon, into diamond. Many metals (e.g., nickel, cobalt, iron, tungsten) may also exist in metastable states and, like diamond, can possess superior properties compared to their more stable counterparts. For example, bulk Ni adopts a face-centered cubic (fcc) crystalline structure. This metastable hexagonal close-packed (hcp) Ni forms only on a nanometric scale. Hcp-Ni exhibits unusual magnetic and mechanical properties, as well as high catalytic activity in the hydrogen evolution reaction. , …”
Section: Introductionmentioning
confidence: 99%
“…Researchers have continued to deepen the research on densely packed hexagonal metals [14][15][16][17]. However, there are a few studies on the recrystallization of hexagonal metals, such as titanium.…”
Section: Introductionmentioning
confidence: 99%