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April 1, 2026Materials Today CommunicationsOpen Access

Size dependence of lattice strain anisotropy in nickel and ceria under non-hydrostatic compression

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Authors

MYMingzhi YuanJXJianing XUHDHaini Dong

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Overview

Investigates lattice strain anisotropy in nickel and ceria under high pressure, indicating unique size-dependent properties.

Key Points

  • To investigate how lattice strain anisotropy changes with grain size in nickel and ceria under non-hydrostatic compression.
  • Utilized synchrotron-based radial X-ray diffraction in a diamond anvil cell.
  • Examined nickel and ceria with grain sizes ranging from 8 to 200 nm under pressures up to ~35 GPa.
  • Analyzed elastic-plastic deformation behaviors and differential lattice aspect ratios.
  • Nickel exhibits a plateau in differential lattice aspect ratio at low pressure due to yielding.
  • Ceria shows continuous elastic deformation in the tested pressure range.
  • Both materials reach a maximum differential lattice aspect ratio of ~3.2% at ~8 nm grain size.
  • Nickel's lattice strain anisotropy significantly enhances with decreasing grain size, while ceria's increase attenuates due to nanoscale plasticity.

Cite This Study

Yuan et al. (2026) studied this question.

synapsesocial.com/papers/69cd7b345652765b073a9074https://doi.org/10.1016/j.mtcomm.2026.115100
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