Room-temperature plastic deformation modes of cubic ZnS crystals

Review Materials Science, Ceramics

Ceramic science of crystal defect cores

Katsuyuki Matsunaga et al.

Summary: Point defects, dislocations, grain boundaries, and interfaces are crucial for the physical and chemical properties of ceramics. Controlling these crystal defects is essential in tailoring ceramic materials with superior properties. This article reviews recent research on the properties and phenomena in ceramics resulting from crystal defects, with a particular emphasis on the importance of crystal defect cores. Advances in nanoscale characterizations and theoretical calculations have enabled the acquisition of quantitative data on the electronic structures enclosed within crystal-defect cores, providing a clear understanding of various ceramic properties at the electronic and atomic levels.

JOURNAL OF THE CERAMIC SOCIETY OF JAPAN (2022)

添加到收藏夹

Article Chemistry, Multidisciplinary

Photoindentation: A New Route to Understanding Dislocation Behavior in Light

Atsutomo Nakamura et al.

Summary: Recent studies have discovered significant plasticity in bulk compression of single-crystal ZnS under complete darkness. The introduction of the photoindentation technique provides a new approach to understand the effects of light on dislocation nucleation and mobility. Research shows that light irradiation significantly increases the pop-in stress of dislocation nucleation near the surface of ZnS, leading to a drastic reduction in dislocation mobility.

NANO LETTERS (2021)

添加到收藏夹

Article Materials Science, Multidisciplinary

Atomic-scale mechanism of rhombohedral twinning in sapphire

Eita Tochigi et al.

Summary: The dynamic twinning behavior dominated by atomic shuffling in sapphire has been reported in this study. The propagation and annihilation of twins are shown to be mediated by migration of step structures on the matrix/twin interfaces, driven by cooperative motions of a group of five atoms with relatively few recombination of Al-O bonds. These findings suggest that atomic shuffling associated with twinning is determined by a collective property of a group of several atoms.

ACTA MATERIALIA (2021)

添加到收藏夹

Article Materials Science, Multidisciplinary