Intriguing Deformation Transition Behavior of Lithium Disilicate Crystal

15 Pages Posted: 10 Jun 2019

See all articles by Binghui Deng

Binghui Deng

Corning Incorporated - Manufacturing Technology & Engineering

Jian Luo

Corning Incorporated - Corning Research and Development Corporation

Jason T. Harris

Corning Incorporated - Manufacturing Technology & Engineering

Charlene M. Smith

Corning Incorporated - Corning Research and Development Corporation

Matthew E. McKenzie

Corning Incorporated - Corning Research and Development Corporation

Date Written: June 9, 2019

Abstract

We report an intriguing anisotropic deformation behavior of lithium disilicate crystal under tensile loadings via molecular dynamics simulations. The crystal undergoes clear brittle cleavage in the [010] direction, while exhibiting a first-order transition with the critical stress of around 8 GPa in the [100] direction. The transition is exclusively facilitated by local Li-O bond breakage spreading to the whole sample. This hierarchical deformation mechanism enables overall structure integrity while undergoing large degrees of deformation. To the best of our knowledge, this is the first observation on this intriguing deformation behavior that might inspire new designs of tougher lithium disilicate glass-ceramics.

Keywords: lithium disilicate, anisotropy, first-order transition, reversible deformation, molecular dynamics

Suggested Citation

Deng, Binghui and Luo, Jian and Harris, Jason T. and Smith, Charlene M. and McKenzie, Matthew E., Intriguing Deformation Transition Behavior of Lithium Disilicate Crystal (June 9, 2019). Available at SSRN: https://ssrn.com/abstract=3401348

Binghui Deng (Contact Author)

Corning Incorporated - Manufacturing Technology & Engineering ( email )

Corning, NY 14831
United States

Jian Luo

Corning Incorporated - Corning Research and Development Corporation

Corning, NY
United States

Jason T. Harris

Corning Incorporated - Manufacturing Technology & Engineering

Corning, NY 14831
United States

Charlene M. Smith

Corning Incorporated - Corning Research and Development Corporation

Corning, NY
United States

Matthew E. McKenzie

Corning Incorporated - Corning Research and Development Corporation

Corning, NY
United States

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